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PC-SIG Diskette Library (Disk #226)
[PCjs Machine "ibm5160"]
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Information about “FREECOPY”
FREECOPY is a disk utility that is functionally equivalent to DISKCOPY
which is distributed with IBM PC DOS. FREECOPY simply replaces
MS-DOS's DISKCOPY, but written better and runs faster. The author
has encouraged your "improving" it by placing the source code here.
The four major files are: FREECOPY.COM is the executable code in a
binary .COM file in machine-readable format; FREECOPY.ASM contains the
source code in structured assembly language with lots of comments;
FREECOPY.MAP is an Assembler map listing; and FREECOPY.DOC contains a
users guide.
How to Start: Read documentation in FREECOPY.DOC. To run, type
FREECOPY from the prompt and answer all questions.
Suggested Registration: $25.00
File Descriptions:
FREECOPY COM A user-supported version of DISKCOPY
FREECOPY LST Assembly listing for those without an Assembler
FREECOPY DOC Users manual (28K)
FREECOPY ASM Source code for FREECOPY.COM
FREECOPY MAP Assembler map listing
FREECOPY REF Assembler reference listing
FILES226.TXT
------------------------------------------------------------------------
Disk No 226 FREECOPY Version 1.13 v1.13 DS2
------------------------------------------------------------------------
FREECOPY COM A user-supported version of DISKCOPY
FREECOPY ASM Source code for FREECOPY.COM
FREECOPY DOC Users manual (28K)
FREECOPY LST Assembly listing for those without an Assembler
FREECOPY REF Assembler reference listing
FREECOPY MAP Assembler map listing
FREECOPY.ASM
Page 55,132
Title FREECOPY Version 1.13 (C)Copyright 1984
;*********************** F R E E C O P Y ******************************
;* *
;* Program: FREECOPY *
;* *
;* Author: Donald L. Buresh, C.D.P. *
;* Squire Buresh Associates, Inc. *
;* Post Office Box 112 *
;* Millbury, MA 01527 *
;* (617) 865-3435 *
;* *
;* !!!!!!!!!!!!!!!!!!!!!! N O T I C E !!!!!!!!!!!!!!!!!!!!!! *
;* *
;* A limited license is granted to all users of this program to *
;* make copies of this source code and to distribute them to *
;* other users under the following conditions: *
;* *
;* 1. The notice contained in the variable MES00_Copy_Notice *
;* is not to be altered, bypassed or removed. *
;* *
;* 2. The program is not to be distributed to others in *
;* modified form. *
;* *
;* 3. If you think that this program has helped you, we request *
;* a $25.00 contribution. *
;* *
;* 4. No other fee is to be charged or any consideration received *
;* for copying or distributing the program without the *
;* expressed written permission of Squire Buresh Assoc, Inc. *
;* *
;* *
;* (C) Copyright 1984 Squire Buresh Associates, Inc. *
;* *
;************************************************************************
Page
;************************************************************************
;* *
;* REVISION HISTORY *
;* *
;* Version *
;* Number Date Comments *
;* *
;* 1.00 16-SEP-84 This is the first version of FREECOPY *
;* *
;* 1.01 13-OCT-84 Corrected a problem when copying *
;* diskettes on 512K systems. Reversed *
;* the order of testing the ES:BX table *
;* counter and the read/write track *
;* counter. Fix was near C2005, C2006, *
;* C2105 and C2106. *
;* *
;* 1.02 13-OCT-84 Flushed the standard input keyboard *
;* buffer before accepting a character. *
;* Fix was near U1101 and U1102. *
;* *
;* 1.03 21-OCT-84 Added parsing a tab character on the *
;* command line. Fix was below C1215. *
;* *
;* 1.04 - 1.09 These versions never really existed in *
;* any decent form. They are incorporated *
;* into fixing the memory allocation *
;* problems stemming from the original *
;* version of FREECOPY. *
;* *
;* 1.10 02-FEB-85 Allocated and freed memory when running *
;* FREECOPY under PC-DOS versions 2.00 *
;* and greater. The fix involved finding *
;* out the version of the operating system,*
;* allocating the memory, establishing *
;* the ES:BX table entries and freeing *
;* memory before returning control to *
;* PC-DOS. *
;* *
;* 1.11 06-JUN-85 Modified the sequence of turning inter- *
;* rupts on and off in the S1000 and S1100 *
;* modules. *
;* *
;* 1.12 06-JUN-85 Allowed users to write more than one *
;* target diskette, by setting FLG17 to *
;* True and jumping to B1105A after ini- *
;* tializing the appropriate variables. *
;* *
;* 1.13 07-JUN-85 Fixed a stack imbalance that appeared *
;* only when running PC-DOS 3.00 on a PC *
;* rather than on an XT or AT *
;* *
;************************************************************************
Page
;************************************************************************
;* *
;* EQUATES *
;* *
;* The constants defined below are used to to specify: *
;* *
;* o Disk commands, *
;* *
;* o Keyboard commands, *
;* *
;* o Video commands *
;* *
;* o Miscellaneous parameters, *
;* *
;* o Various ASCII characters. *
;* *
;************************************************************************
;
Disk_Parameter_Addr Equ 001EH*4 ; Address of Disk Parameter Table
;
Reset_Command Equ 0000D ; Diskette reset command
Status_Command Equ 0001D ; Diskette status command
Read_Command Equ 0002D ; Diskette read command
Write_Command Equ 0003D ; Diskette write command
Verify_Command Equ 0004D ; Diskette verify command
Format_Command Equ 0005D ; Diskette format command
;
Time_Out_Error Equ 0080H ; Diskette error codes
Seek_Error Equ 0040H ; .
Controller_Error Equ 0020H ; .
CRC_Error Equ 0010H ; .
DMA_Boundary_Error Equ 0009H ; .
DMA_Error Equ 0008H ; .
Sector_Error Equ 0004H ; .
Write_Protect_Error Equ 0003H ; .
Address_Mark_Error Equ 0002H ; .
Command_Error Equ 0001H ; ..End
;
Video_Address Equ 0A000H ; Starting segment addr of Video RAM
;
Set_Mode_Command Equ 0000D ; Set the video mode
Set_CType_Command Equ 0001D ; Set the cursor type
Set_CPos_Command Equ 0002D ; Set the cursor position
Read_Cursor_Command Equ 0003D ; Get cursor position and attributes
Read_LPen_Command Equ 0004D ; Get the light pen position
Set_ADPage_Command Equ 0005D ; Set the active display page
Scroll_Up_Command Equ 0006D ; Scrool up or blank a portion of
; . the video display
;
Page
;************************************************************************
;* *
;* EQUATES Page 2 *
;* *
;************************************************************************
;
Scroll_Down_Command Equ 0007D ; Scroll down or blank a portion
; . of the video display
Read_AChar_Command Equ 0008D ; Read the attribute and character
Write_AChar_command Equ 0009D ; Write the attribute and character
Write_Char_Command Equ 0010D ; Write the character only
Set_Color_Command Equ 0011D ; Set the color pallette
Write_Dot_Command Equ 0012D ; Write a pixel to a graphics screen
Read_Dot_Command Equ 0013D ; Read a pixel from a graphics screen
Write_TTY_Command Equ 0014D ; Write a character with automatic
; . processing for LF, CR, Bell & BS
Video_State_Command Equ 0015D ; Get the current video state
;
Read_Keyboard_Command Equ 0007D ; Reads character from the keyboard
Flush_Keyboard_Command Equ 0012D ; Clears the standard keyboard buffer
Get_DOS_Version_Number Equ 0030H ; Gets the current version of PC-DOS
Allocate_Memory Equ 0048H ; Allocate a block of memory
Free_Memory Equ 0049H ; Free a block of memory
Modify_Memory_Block Equ 004AH ; Modify the size of memory block
;
Default_Drive_Command Equ 0025D ; Get PC DOS default drive number
;
Video_Interrupt Equ 0010H ; Interrupt 10H for video calls
Equipment_Interrupt Equ 0011H ; Interrupt 11H for equipment
Disk_Interrupt Equ 0013H ; Interrupt 13H for disk calls
PC_DOS_Interrupt Equ 0021H ; Interrupt 21H for PC DOS calls
;
Parallel_Ports_Mask Equ 0C000H ; Equipment masks
Game_Adapters_Mask Equ 00100H ; .
RS232_Ports_Mask Equ 00E00H ; .
Disk_Drives_Mask Equ 000C0H ; .
Init_Video_Mask Equ 00030H ; .
Planar_RAM_Mask Equ 0000CH ; .
IPL_Diskette_Mask Equ 00001H ; ..End
;
Page
;************************************************************************
;* *
;* EQUATES Page 3 *
;* *
;************************************************************************
;
Command_Com_Size Equ 0410D ; Size of various tables and programs
CHRN_Table_Size Equ 0180D ; in 16 byte paragraphs
; .
; .
ESBX_Table_Size Equ 0020D ; .
; .
; .
FAT_Sector_Size Equ 0032D ; ..End
;
DMA_Boundary_Mask Equ 0FFFH ; Mask to isolate the high nibble of
; . the ES segment address
;
Invalid_Drive Equ 0255D ; Invalid drive parameter
Maximum_Drives Equ 0003D ; Maximum number of floppy drives
Minimum_Drives Equ 0000D ; Minimum number of floppy drives
;
Sector_Size Equ 0512D ; Number of bytes per sector
Paragraph_Size Equ 0016D ; Number of bytes per paragraph
Number_of_Retries Equ 0005D ; Number of attempts to copy
; . a track before admitting failure
Final_Track Equ 0039D ; The last track on a PC DOS diskette
;
One_Side_Eight_Sectors Equ 00FEH ; First entry in the File Allocation
Two_Sides_Eight_Sectors Equ 00FFH ; Table (FAT)
One_Side_Nine_Sectors Equ 00FCH ; .
Two_Sides_Nine_Sectors Equ 00FDH ; .
Fixed_Disk Equ 00F8H ; ..End
;
Keyboard_Buffer_Size Equ 0080D ; Maximum number of characters in
; . the keyboard buffer
;
Minimum_Memory_Size Equ 0288D ; Minimum memory size in 16 byte
; . paragraphs to hold a nine
; . sectored track
;
Blank_Cursor Equ 0F0FH ; Blank cursor value
Underline_Cursor Equ 0D0DH ; Underline cursor value
;
False Equ 0000D ; Incorrect processing occured
True Equ Not False ; Correct processing occured
High_Values Equ 0FFFFH ; High values
;
Page
;************************************************************************
;* *
;* EQUATES Page 4 *
;* *
;************************************************************************
;
NUL Equ 0000D ; Null character
SOH Equ 0001D ; SOH character
STX Equ 0002D ; STX character
ETX Equ 0003D ; Control Break character
Bell Equ 0007D ; Bell character
BS Equ 0008D ; Backspace character
HT Equ 0009D ; Horizontal tab character
LF Equ 0010D ; Line feed character
CR Equ 0013D ; Carriage return character
Space Equ 0032D ; Space or blank character
Slash Equ 0047D ; Slash character
Zero_Digit Equ 0048D ; Digit Zero
One_Digit Equ 0049D ; Digit One
Capital_Letter_A Equ 0065D ; Capital letter A
Capital_Letter_N Equ 0078D ; Capital letter N
Capital_Letter_Y Equ 0089D ; Capital letter Y
Small_Letter_n Equ 0110D ; Small letter n
Small_Letter_y Equ 0121D ; Small letter y
EOT Equ 0255D ; End of text character
;
Minus_One Equ -1D ; Numbers used in FREECOPY
Zero Equ 0000D ; .
One Equ 0001D ; .
Two Equ 0002D ; .
Three Equ 0003D ; .
Four Equ 0004D ; .
Six Equ 0006D ; .
Eight Equ 0008D ; .
Nine Equ 0009D ; .
Ten Equ 0010D ; .
Eleven Equ 0011D ; .
Twelve Equ 0012D ; .
Fourteen Equ 0014D ;.
Fifteen Equ 0015D ; .
Twenty_Four Equ 0024D ; .
Twenty_Five Equ 0025D ; .
Thirty_Four Equ 0034D ; .
Thirty_Six Equ 0036D ; .
Thirty_Nine Equ 0039D ; .
Seventy_Nine Equ 0079D ; ..End
;
Page
;************************************************************************
;* *
;* CSEG Segment *
;* *
;* This segment contains all of the code of the program. It is *
;* named CSEG because this name conforms with ASM-86. *
;* *
;************************************************************************
;
CSEG Segment Para Public 'CSEG'
Assume CS:CSEG,DS:CSEG,ES:CSEG,SS:Nothing
;
Page
;************************************************************************
;* *
;* PROGRAM SEGMENT PREFIX *
;* *
;* The first 256 bytes of every program executed under PC DOS *
;* contains a Program Segment Prefix control block. The data *
;* stored in this block of memory is used by FREECOPY to process *
;* the parameters when invoking the program. *
;* *
;************************************************************************
;
Org 05CH
Source_Drive Label Byte ; Source diskette drive number
Org 05DH
Source_Filename Label Byte ; Source diskette filename
Org 068H
Source_Filler_Area Label Byte
Org 06CH
Target_Drive Label Byte ; Target diskette drive number
Org 06DH
Target_Filename Label Byte ; Target diskette filename
Org 078H
Target_Filler_Area Label Byte
Org 080H
Parameter_Count Label Byte ; Number of parameters
Org 081H
Parameter_String Label Byte ; String entered by the user
;
Page
;************************************************************************
;* *
;* A1000_MAIN_MODULE *
;* *
;* This is the top level of FREECOPY and it controls the flow of *
;* the program. The first sequence of commands in the routine *
;* preserve the state of the machine. Next, there is a set of *
;* three (3) calls to sub-modules that control the initial *
;* processing, detail processing and final processing. Finally, *
;* FREECOPY restores the state of the machine an returns to *
;* PC DOS via INT 20H. *
;* *
;************************************************************************
;
Org 0100H
;
Public A1000_Main_Module
;
A1000_Main_Module Proc Far
;
A1001:
Cli ; Set up the top of the stack
Mov SP,Offset MEM04_Top_of_the_Stack
Sti ; ..End
;
Push BP ; Save the state of the machine
Push DS ; .
Push ES ; .
Push SS ; .
Push AX ; .
Push BX ; .
Push CX ; .
Push DX ; .
Push SI ; .
Push DI ; .
Pushf ; ..End
;
Cli ; Save the current stack pointer
Mov Word Ptr SYS15_Stack_Pointer,SP
Add Word Ptr SYS15_Stack_Pointer,Two ; .
Sti ; ..End
;
Call B1000_Initial_Process ; Main flow of control
Cmp Byte Ptr FLG01_Good_Command,False
Je A1002 ; .
Cmp Byte Ptr FLG03_Default_Drive,False
Je A1002 ; .
Call B1100_Detail_Process ; .
A1002: ; .
Call B1200_Final_Process ; ..End
A1090:
Popf ; Restore the state of the machine
Pop DI ; .
Pop SI ; .
Pop DX ; .
Pop CX ; .
Pop BX ; .
Pop AX ; .
Pop SS ; .
Pop ES ; .
Pop DS ; .
Pop BP ; ..End
A1099:
Int 20H ; Return to PC DOS
;
A1000_Main_Module Endp
;
Page
;************************************************************************
;* *
;* B1000_INITIAL_PROCESS *
;* *
;* This module performs the following functions after control *
;* passess to FREECOPY: *
;* *
;* 1. Sets up the Disk Parameter Table. *
;* *
;* 2. Gets the current PC-DOS version number. *
;* *
;* 3. Initializes various parameters. *
;* *
;* 4. Gets and sets the video mode. *
;* *
;* 5. Displays the intiial message. *
;* *
;* 6. Parses the command line entered by a user. *
;* *
;* 7. Determines the amount of equipment on the machine. *
;* *
;* 8. Validates the number of disk drives on the system. *
;* *
;* 9. Displays the appropriate disk copying message. *
;* *
;* 10. Gets the amount of available memory. *
;* *
;* 11. Calculates the number and position of the entries in the *
;* ES:BX buffer address table. *
;* *
;************************************************************************
;
Page
;
Public B1000_Initial_Process
;
B1000_Initial_Process Proc Near
;
B1001:
Call S1000_Setup_Disk_Param_Table
Call S1200_Get_Version_Number
;
Mov Byte Ptr FLG01_Good_Command,True
Mov Byte Ptr FLG02_Double_Side,True
Mov Byte Ptr FLG03_Default_Drive,True
Mov Byte Ptr FLG04_Single_Drive,True
Mov Byte Ptr FLG07_First_Time,True
Mov Byte Ptr FLG16_Free_Memory,True
Mov Byte Ptr FLG17_Copy_More_Disks,False
B1002:
Call C1000_Get_And_Set_Video ; Get and set current video state
Call C1100_Display_Intro ; Display the intial screen
Call C1200_Parse_Commands ; Parse the command line entered
; . by the user
Cmp Byte Ptr FLG01_Good_Command,False
Je B1099 ; If false, go to end of the module
Call C1300_Get_Equipment ; Find out the equipment on the PC
Call C1400_Validate_Drives ; Validate the drive numbers
Cmp Byte Ptr FLG03_Default_Drive,False
Je B1099 ; If false, go to end of the module
Call C1500_Diskette_Messages ; Display the appropriate messages
;
Cmp Byte Ptr SYS19_Major_Vers_Number,Zero
Jne B1003 ; Get available memory in paragraphs
Call C1600A_Get_Free_Memory ; . and create the ES:BX table
Jmp B1004 ; .
B1003: ; .
Call C1600B_Get_Free_Memory ; .
B1004: ; .
Cmp Byte Ptr FLG01_Good_Command,False
Je B1099 ; .
Call C1700_Create_ESBX_Table; ..End
B1099:
Ret
;
B1000_Initial_Process Endp
;
Page
;************************************************************************
;* *
;* B1100_DETAIL_PROCESS *
;* *
;* This module performs the following functions when copying one *
;* or more diskettes: *
;* *
;* 1. Initializes various parameters. *
;* *
;* 2. Validates the contents of the source diskette. *
;* *
;* 3. Creates all of the entries of the CHRN table used in *
;* formatting the target diskette. *
;* *
;* 4. Reads the tracks of the source diskette. *
;* *
;* 5. If the diskette is being copied on only one drive, the *
;* routines asks the user to enter the target diskette. *
;* *
;* 6. Writes the tracks on the target diskette. *
;* *
;* 7. If FREECOPY is finished copying the source diskette, the *
;* program asks whether to write another target diskette, *
;* provided the source diskette fits completely in memory; *
;* otherwise, the program asks whether to copy a new diskette. *
;* If not, the module returns to A1000_Main_Module. If so, *
;* control transfers to 1. *
;* *
;* 8. If FREECOPY is not completed copying the source diskette, *
;* control transfers to 4. *
;* *
;************************************************************************
;
Page
;
Public B1100_Detail_Process
;
B1100_Detail_Process Proc Near
;
B1101:
Mov Byte Ptr WRK20_Current_Source_Head,Zero
Mov Byte Ptr WRK21_Current_Source_Track,Zero
Mov Byte Ptr WRK22_Current_Target_Head,Zero
Mov Byte Ptr WRK23_Current_Target_Track,Zero
Mov Word Ptr WRK33_CHRN_Table_Address,Offset MEM02_CHRN_Table
Mov Byte Ptr FLG13_First_Read_Write,True
Mov Byte Ptr FLG14_Copy_Complete,False
Mov Byte Ptr FLG15_IO_Error,Three
B1102:
Call C1800_Validate_Source_Disk
Cmp Byte Ptr FLG08_Good_Read,True
Je B1103 ; If it is a valid source, continue
Mov SI,Offset MES07_Correct_And_Press_Key
Call U1000_Display_Message ; Display the message on the screen
Mov Byte Ptr FLG05_Store_Buffer,False
Call U1100_Get_Response ; Get the user's response
Jmp B1101 ; Go back and try again
B1103:
Call C1900_Create_CHRN_Table
B1104:
Call C2000_Read_Source_Disk
Cmp Byte Ptr FLG08_Good_Read,True
Je B1105 ; If read disk correctly, continue
Mov SI,Offset MES07_Correct_And_Press_Key
Call U1000_Display_Message ; Display the message on the screen
Mov Byte Ptr FLG05_Store_Buffer,False
Call U1100_Get_Response ; Get the user's response
Jmp B1101 ; Go back and try again
B1105:
Cmp Byte Ptr FLG04_Single_Drive,False
Je B1106 ; If a single drive copy, continue
B1105A:
Mov SI,Offset MES10_Insert_Target
Mov AL,Byte Ptr WRK02_Target_Drive
Add AL,Capital_Letter_A ; Put drive letter into AL
Mov [SI+Thirty_Four],AL ; Put the drive letter into the
; . correct position in the message
Call U1000_Display_Message ; Display the message on the screen
Mov SI,Offset MES16_Press_Any_Key
Call U1000_Display_Message ; Display the message on the screen
Mov Byte Ptr FLG05_Store_Buffer,False
Call U1100_Get_Response ; Get the user's response
B1106:
Call C2100_Write_Format_Target_Disk
Cmp Byte Ptr FLG09_Good_Write,False
Je B1110 ; If bad write, go to bottom of loop
Cmp Byte Ptr FLG11_Good_Format,False
Je B1110 ; If bad format, go to bottom of loop
B1107:
Cmp Byte Ptr FLG14_Copy_Complete,True
Je B1109 ; If copy done, go to bottom of loop
Cmp Byte Ptr FLG04_Single_Drive,False
Je B1108 ; If double drive copy, continue
Mov SI,Offset MES09_Insert_Source
Mov AL,Byte Ptr WRK01_Source_Drive
Add AL,Capital_Letter_A ; Put the drive letter into AL
Mov [SI+Thirty_Four],AL ; Put the drive letter into the
; . correct position in the message
Call U1000_Display_Message ; Display the message on the screen
Mov SI,Offset MES16_Press_Any_Key
Call U1000_Display_Message ; Display the message on the screen
Mov Byte Ptr FLG05_Store_Buffer,False
Call U1100_Get_Response ; Get the user's response
B1108:
Call C2200_Check_File_Alloc_Table
Cmp Byte Ptr FLG12_Good_FAT,False
Je B1110 ; If bad FAT, go to bottom of loop
Mov Byte Ptr FLG13_First_Read_Write,False
Jmp B1104 ; Go back and read some more
B1109:
Mov Byte Ptr FLG07_First_Time,False
Mov SI,Offset MES02_Copy_Complete
Call U1000_Display_Message
B1110:
Cmp Byte Ptr FLG17_Copy_More_Disks,False
Je B1111
Mov SI,Offset MES01A_Write_Another_Diskette
Call U1000_Display_Message
Call U1200_Get_Yes_or_No
Cmp Byte Ptr FLG06_Yes_or_No,False
Je B1111 ; Continue
Mov Byte Ptr WRK22_Current_Target_Head,Zero
Mov Byte Ptr WRK23_Current_Target_Track,Zero
Mov Word Ptr WRK33_CHRN_Table_Address,Offset MEM02_CHRN_Table
Mov Byte Ptr FLG13_First_Read_Write,True
Mov Byte Ptr FLG14_Copy_Complete,False
Mov Byte Ptr FLG15_IO_Error,Three
Jmp B1105A ; Start writing a diskette again
B1111:
Mov SI,Offset MES01B_Copy_Another_Diskette
Call U1000_Display_Message
Call U1200_Get_Yes_or_No
Cmp Byte Ptr FLG06_Yes_or_No,False
Je B1199 ; Go to the end of the module
Call C1500_Diskette_Messages ; Print out the messages on screen
Jmp B1101 ; Start copying a diskette again
B1199:
Ret
;
B1100_Detail_Process Endp
;
Page
;************************************************************************
;* *
;* B1200_FINAL_PROCESS *
;* *
;* This module performs the following functions before returning *
;* control to PC DOS: *
;* *
;* 1. Restores the value of the stack pointer. *
;* *
;* 2. Displays the final message of the program. *
;* *
;* 3. Restores the underline cursor. *
;* *
;* 4. Restores the settings in the Disk Parameter Table. *
;* *
;* 5. Returns control to A1000_Main_Module. *
;* *
;************************************************************************
;
Page
;
Public B1200_Final_Process
;
B1200_Final_Process Proc Near
;
B1201:
Cli ; Establish the stack pointer
Mov SP,Word Ptr SYS15_Stack_Pointer
Sti ; ..End
;
Call C2300_Free_Memory ; Free allocated memory if necessary
;
Mov SI,Offset MES100_Freecopy_Finished
Call U1000_Display_Message ; Display the message on the screen
;
Mov AH,Set_CType_Command ; Restore the underline cursor
Mov CX,Underline_Cursor ; .
Int Video_Interrupt ; ..End
;
Call S1100_Restore_Disk_Param_Table
;
Mov AX,Offset A1090 ; Setup to return to the main module
Push CS ; .
Push AX ; ..End
B1299:
Ret
;
B1200_Final_Process Endp
;
Page
;************************************************************************
;* *
;* C1000_GET_AND_SET_VIDEO *
;* *
;* This module gets the current video state and saves this *
;* information in the various SYStem variables. *
;* *
;************************************************************************
;
Public C1000_Get_And_Set_Video
;
C1000_Get_And_Set_Video Proc Near
;
C1001:
Push AX ; Save the registers
Push BX ; .
Push CX ; ..End
C1002:
Mov AH,Video_State_Command ; Get the current video state
Int Video_Interrupt ; ..End
Mov Byte Ptr SYS01_Number_Columns,AH
Mov Byte Ptr SYS02_Current_Mode,AL
Mov Byte Ptr SYS03_Active_Page,BH
C1003:
Mov AH,Set_CType_Command ; Set the cursor to blanks
Mov CX,Blank_Cursor ; .
Int Video_Interrupt ; ..End
C1090:
Pop CX ; Restore the registers
Pop BX ; .
Pop AX ; ..End
C1099:
Ret
;
C1000_Get_And_Set_Video Endp
;
Page
;************************************************************************
;* *
;* C1100_DISPLAY_INTRO *
;* *
;* This module displays the introductory message to FREECOPY. *
;* Please do not disable this message, since it states the *
;* conditions under which a person may copy this program. *
;* *
;************************************************************************
;
Public C1100_Display_Intro
;
C1100_Display_Intro Proc Near
;
C1101:
Mov SI,Offset MES00_Copy_Notice ; Display the copy notice
Call U1000_Display_Message ; ..End
C1199:
Ret
C1100_Display_Intro Endp
;
Page
;************************************************************************
;* *
;* C1200_PARSE_COMMANDS *
;* *
;* This module parses the command line entered by the user *
;* by checking the following conditions: *
;* *
;* 1. The source and/or the target drives do not exist. *
;* *
;* 2. The command line contains any characters other than two *
;* drive letters (e.g., a filename). *
;* *
;* 3. The /1 (single side) parameter is on the command line. *
;* *
;************************************************************************
;
Public C1200_Parse_Commands
;
C1200_Parse_Commands Proc Near
;
C1201:
Cmp AH,Invalid_Drive ; Compare for invalid drive parms
Jne C1202 ; .
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES14_Invalid_Drive
Call U1000_Display_Message
Jmp C1299 ; .
C1202: ; .
Cmp AL,Invalid_Drive ; .
Jne C1203 ; .
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES14_Invalid_Drive
Call U1000_Display_Message
Jmp C1299 ; ..End
C1203:
Mov AL,Byte Ptr Source_Drive
Mov Byte Ptr WRK01_Source_Drive,AL
Mov AL,Byte Ptr Target_Drive
Mov Byte Ptr WRK02_Target_Drive,AL
C1204:
Mov SI,Offset Source_Filename
Mov DI,Offset WRK03_Valid_Filename
Mov CX,Eleven ; Set CX to compare 11 characters
C1205:
Mov AL,[SI] ; Compare for valid source diskette
Mov AH,[DI] ; filename in the FCB at 05DH
Cmp AH,AL ; .
Je C1206 ; .
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES12_Invalid_Parameter
Call U1000_Display_Message
Jmp C1299 ; .
C1206: ; .
Inc SI ; .
Inc DI ; .
Loop C1205 ; ..End
C1207:
Mov SI,Offset Target_Filename
Mov DI,Offset WRK03_Valid_Filename
Mov CX,Eleven ; Set CX to comapre 11 characters
C1208:
Mov AL,[SI] ; Compare for valid target diskette
Mov AH,[DI] ; . filename in the FCB at 06DH
Cmp AH,AL ; .
Je C1209 ; .
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES12_Invalid_Parameter
Call U1000_Display_Message
Jmp C1299 ; .
C1209: ; .
Inc SI ; .
Inc DI ; .
Loop C1208 ; ..End
C1210:
Mov AL,Byte Ptr Parameter_Count
Mov Byte Ptr WRK04_Parameter_Count,AL
Mov SI,Offset Parameter_String
Inc Byte Ptr WRK04_Parameter_Count
C1211:
Dec Byte Ptr WRK04_Parameter_Count
Jz C1299 ; Go to the end of the module
Mov AL,[SI] ; Put the character into AL
Cmp AL,Slash ; Compare character with a slash
Je C1212 ; If so, then continue processing
Inc SI ; Increment the command string addr
Jmp C1211 ; Go back and try again
C1212:
Inc SI ; Increment the command string addr
Mov AL,[SI] ; Get the next char after the slash
Cmp AL,One_Digit ; Compare with the char 1
Je C1214 ; Set double side flag to false
C1213:
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES12_Invalid_Parameter
Call U1000_Display_Message
Jmp C1299 ; Go to the end of the module
C1214:
Mov Byte Ptr FLG02_Double_Side,False
Dec Byte Ptr WRK04_Parameter_Count
Jz C1299 ; Go to the end of the module
C1215:
Dec Byte Ptr WRK04_Parameter_Count
Jz C1299 ; Go to the end of the module
Inc SI ; Increment the command string addr
Mov AL,[SI] ; Get the next char in command line
Cmp AL,HT ; Check for tabs and spaces
Je C1215 ; .
Cmp AL,Space ; .
Je C1215 ; ..End
C1216:
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES12_Invalid_Parameter
Call U1000_Display_Message
C1299:
Ret
;
C1200_Parse_Commands Endp
;
Page
;************************************************************************
;* *
;* C1300_GET_EQUIPMENT *
;* *
;* This module determines the peripheral devices on the machine. *
;* It invokes the equipment status interrupt and places the *
;* information into the appropriate SYStem parameters. *
;* *
;************************************************************************
;
Public C1300_Get_Equipment
C1300_Get_Equipment Proc Near
;
C1301:
Int Equipment_Interrupt ; Get the equipment on machine
Mov BX,AX ; Save the result for future use
;
And AX,Parallel_Ports_Mask ; Get the number of parallel ports
Mov CL,Fourteen ; .
Shr AX,CL ; .
Mov Byte Ptr SYS07_No_Parallel_Ports,AL
;
Mov AX,BX ; Get the game adapter attachments
And AX,Game_Adapters_Mask ; .
Mov CL,Twelve ; .
Shr AX,CL ; .
Mov Byte Ptr SYS08_Game_Adapters,AL
;
Mov AX,BX ; Get the number of RS-232 ports
And AX,RS232_Ports_Mask ; .
Mov CL,Nine ; .
Shr AX,CL ; .
Mov Byte Ptr SYS09_No_RS232_Ports,AL
;
Mov AX,BX ; Get the number of diskette drives
And AX,Disk_Drives_Mask ; .
Mov CL,Six ; .
Shr AX,CL ; .
Mov Byte Ptr SYS10_No_Disk_Drives,AL
;
Mov AX,BX ; Get the initial video mode
And AX,Init_Video_Mask ; .
Mov CL,Four ; .
Shr AX,CL ; .
Mov Byte Ptr SYS11_Init_Video_Mode,AL
;
Mov AX,BX ; Get planar RAM size
And AX,Planar_RAM_Mask ; .
Mov CL,Two ; .
Shr AX,CL ; .
Mov Byte Ptr SYS12_Planar_RAM_Size,AL
;
Mov AX,BX ; Get IPL from diskette flag
And AX,IPL_Diskette_Mask ; .
Mov Byte Ptr SYS13_IPL_From_Diskette,AL
;
C1399:
Ret
;
C1300_Get_Equipment Endp
;
Page
;************************************************************************
;* *
;* C1400_VALIDATE_DRIVES *
;* *
;* This module determines if the drives specified in the *
;* command line are floppy disk drives or RAM disk drives. *
;* It also checks if copying the source diskette takes place *
;* on a single drive. *
;* *
;************************************************************************
;
Public C1400_Validate_Drives
;
C1400_Validate_Drives Proc Near
;
C1401:
Mov AH,Default_Drive_Command; Get the PC DOS default drive
Int PC_DOS_Interrupt ; .
Mov Byte Ptr SYS14_Default_Drive,AL
C1402:
Cmp Byte Ptr SYS10_No_Disk_Drives,Minimum_Drives
Ja C1403 ; If not single drive copy, set
; . FLG04 to false
Mov Byte Ptr SYS14_Default_Drive,Minimum_Drives
Mov Byte Ptr WRK01_Source_Drive,Minimum_Drives
Mov Byte Ptr WRK02_Target_Drive,Minimum_Drives
Jmp C1499 ; Go to the end of the module
C1403:
Mov Byte Ptr FLG04_Single_Drive,False
C1404:
Cmp Byte Ptr SYS14_Default_Drive,Maximum_Drives
Jbe C1405 ; If below maximum, continue
Mov Byte Ptr FLG03_Default_Drive,False
Mov SI,Offset MES13_Invalid_Default
Call U1000_Display_Message
Jmp C1499 ; Go to the end of the module
C1405:
Dec Byte Ptr WRK01_Source_Drive
Cmp Byte Ptr WRK01_Source_Drive,Minus_One
Jne C1406
Mov AL,Byte Ptr SYS14_Default_Drive
Mov Byte Ptr WRK01_Source_Drive,AL
C1406:
Dec Byte Ptr WRK02_Target_Drive
Cmp Byte Ptr WRK02_Target_Drive,Minus_One
Jne C1407
Mov AL,Byte Ptr SYS14_Default_Drive
Mov Byte Ptr WRK02_Target_Drive,AL
C1407:
Mov AL,Byte Ptr WRK01_Source_Drive
Mov AH,Byte Ptr WRK02_Target_Drive
Cmp AH,AL ; Check source drive = target drive
Jne C1499 ; If so, then continue
Mov Byte Ptr FLG04_Single_Drive,True
C1499:
Ret
;
C1400_Validate_Drives Endp
;
Page
;************************************************************************
;* *
;* C1500_DISKETTE_MESSAGES *
;* *
;* This module displays the appropriate source and target *
;* insertion diskette messages on the screen. *
;* *
;************************************************************************
;
Public C1500_Diskette_Messages
;
C1500_Diskette_Messages Proc Near
;
C1501:
Cmp Byte Ptr FLG07_First_Time,False
Je C1502 ; If not first time, continue
Cmp Byte Ptr FLG04_Single_Drive,False
Je C1502 ; If false, then continue
Mov SI,Offset MES15_Single_Drive_Copy
Call U1000_Display_Message
C1502:
Mov SI,Offset MES09_Insert_Source
Mov AL,Byte Ptr WRK01_Source_Drive
Add AL,Capital_Letter_A ; Put the drive letter into AL
Mov [SI+Thirty_Four],AL ; Put the drive letter into the
; . correct position in the message
Call U1000_Display_Message ; Display the message on the screen
C1503:
Cmp Byte Ptr FLG04_Single_Drive,True
Je C1505 ; If true, go to the message to press
; . any key to continue
C1504:
Mov SI,Offset MES10_Insert_Target
Mov AL,Byte Ptr WRK02_Target_Drive
Add AL,Capital_Letter_A ; Put the drive letter into AL
Mov [SI+Thirty_Four],AL ; Put the drive letter into the
; . correct position in the message
Call U1000_Display_Message ; Display the message on the screen
C1505:
Mov SI,Offset MES16_Press_Any_Key
Call U1000_Display_Message
Mov Byte Ptr FLG05_Store_Buffer,False
Call U1100_Get_Response
C1599:
Ret
;
C1500_Diskette_Messages Endp
;
Page
;************************************************************************
;* *
;* C1600A_GET_FREE_MEMORY *
;* *
;* This module calculates the amount of free 16 byte paragraphs *
;* available on the machine. The segment address of the beginning *
;* of free memory is obtained by setting DX to: *
;* *
;* 1. The contents of the stack segment SS plus *
;* *
;* 2. 256 bytes for the Program Segment Prefix plus *
;* *
;* 3. 128 bytes for the stack. *
;* *
;* After saving the ES segment register on the stack and *
;* initializing both the offset register BX and the 16 byte *
;* counter register CX to zero, the routine begins the looping *
;* through memory 16 bytes at a time (incrementing the segment *
;* register ES by one) until either the module encounters one *
;* of the two (2) conditions: *
;* *
;* 1. The beginning of Video RAM at the segment address *
;* specified in Video_Address. *
;* *
;* 2. The memory pattern defined by the machine that *
;* indicates no more memory. *
;* *
;* When either of these two (2) conditions occur, CX contains *
;* the number of 16 bytes paragraphs of free memory. *
;* *
;* Since we do not know the size of the transient portion of *
;* COMMAND.COM, FREECOPY makes the worst case assumption that *
;* all of the bytes in COMMAND.COM reside in high memory. *
;* *
;* This module also allocates space for the ES:BX table, the *
;* CHRN table, the File Allocation Table (FAT) of the source *
;* diskette and at least one track (4608 bytes). *
;* *
;* This module executes only when running PC-DOS 1.0 and 1.1!!! *
;* *
;************************************************************************
;
Page
;
Public C1600A_Get_Free_Memory
;
C1600A_Get_Free_Memory Proc Near
;
C1601A:
Mov DX,SS ; Calculate the segment address for
; . the beginning of free memory
Add DX,Offset MEM04_Top_of_the_Stack
;
Push ES ; Save ES on the stack for a moment
Mov BX,NUL ; Initialize BX and CX registers
Mov CX,NUL ; ..End
C1602A:
Mov ES,DX ; Set ES to the appropriate value
Cli ; Turn off interrupts for a moment
Mov AX,ES:[BX] ; Read a word from memory into AX
Mov Word Ptr ES:[BX],SOH ; Put the test pattern into memory
Cmp Word Ptr ES:[BX],SOH ; Compare memory with test pattern
Mov ES:[BX],AX ; Restore the contents of memory
Sti ; Turn on the interrupts
Jne C1603A ; If not equal, stop looping
Inc DX ; Increment DX segment register
Cmp DX,Video_Address ; Compare for start of Video RAM
Jae C1603A ; If so, stop looping
Inc CX ; Increment 16 byte counter CX
Jmp C1602A ; Go back and try again
C1603A:
Pop ES ; Restore the ES register
Cmp CX,Command_Com_Size ; Compare the paragraph size of
; . free memory with the paragraph
; . size of COMMAND.COM.
Ja C1604A ; If greater, continue
;
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES11_Insufficient_Memory
Call U1000_Display_Message ; Display the message on the screen
Jmp C1699A ; Go to the end of the module
C1604A:
Sub CX,Command_Com_Size ; Subtract the size of COMMAND.COM
Cmp CX,ESBX_Table_Size ; Compare the paragraph size of the
; . free memory with the paragraph
; . size of the ES:BX table
Ja C1605A ; If greater, continue
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES11_Insufficient_Memory
Call U1000_Display_Message ; Display the message on the screen
Jmp C1699A ; Go to the end of the module
C1605A:
Sub CX,ESBX_Table_Size ; Subtract the size of ES:BX table
Cmp CX,CHRN_Table_Size ; Compare the paragraph size of the
; . free memory with the paragraph
; . size of the CHRN table
Ja C1606A ; If greater, continue
;
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES11_Insufficient_Memory
Call U1000_Display_Message ; Display the message on the screen
Jmp C1699A ; Go to the end of the module
C1606A:
Sub CX,CHRN_Table_Size ; Subtract the size of CHRN Table
Cmp CX,FAT_Sector_Size ; Determine if there is enough memory
Jae C1607A ; to read the File Allocation Table
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES11_Insufficient_Memory
Call U1000_Display_Message ; Display the message on the screen
Jmp C1699A ; Go to the end of the module
C1607A:
Sub CX,FAT_Sector_Size ; Subtract the size of the source FAT
Cmp CX,Minimum_Memory_Size ; Determine if the amount of memory
Jae C1608A ; can hold a nine sectored track
;
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES11_Insufficient_Memory
Call U1000_Display_Message ; Display the message on the screen
Jmp C1699A ; Go to the end of the module
C1608A:
Mov Word Ptr SYS05_Para_RAM_Size,CX
C1699A:
Ret
;
C1600A_Get_Free_Memory Endp
;
Page
;************************************************************************
;* *
;* C1600B_GET_FREE_MEMORY *
;* *
;* This module calcules the amount of available memory. It *
;* executes when running PC-DOS versions 2.0 and above. *
;* *
;************************************************************************
;
Public C1600B_Get_Free_Memory
;
C1600B_Get_Free_Memory Proc Near
;
C1601B:
Mov AH,Modify_Memory_Block ; Allocate enough space for the
Mov BX,Offset MEM00_Bottom_Free_Memory
Mov CL,Four ; . program and all tables
Shr BX,CL ; .
Inc BX ; .
Int PC_DOS_Interrupt ; .
Jnc C1603B ; ..End
C1602B:
Mov Byte Ptr FLG01_Good_Command,False
Mov SI,Offset MES11_Insufficient_Memory
Call U1000_Display_Message ; Display the message on the screen
Jmp C1699B ; Go to the end of the module
C1603B:
Mov AH,Allocate_Memory ; Get the amount of available memory
Mov BX,High_Values ; .
Int PC_DOS_Interrupt ; .
Mov Word Ptr SYS21_Alloc_Segment,AX
Mov Word Ptr SYS05_Para_RAM_Size,BX
Jnc C1699B ; .
Cmp AL,Eight ; .
Je C1605B ; .
C1604B:
Mov SI,Offset MES97_Return_Linefeed
Call U1000_Display_Message ; Issue a carriage return/linefeed
Mov SI,Offset MES99_Memory_Block_Destroyed
Call U1000_Display_Message ; Display the message on the screen
Jmp C1699B ; Go to the end of the module
C1605B:
Mov AH,Allocate_Memory ; .
Int PC_DOS_Interrupt ; ..End
Mov Word Ptr SYS21_Alloc_Segment,AX
Mov Word Ptr SYS05_Para_RAM_Size,BX
Jnc C1606B ; Set the allocation flag
Jmp C1604B ; Go to the error condition
C1606B:
Mov Byte Ptr FLG16_Free_Memory,False
C1699B:
Ret
;
C1600B_Get_Free_Memory Endp
;
Page
;************************************************************************
;* *
;* C1700_CREATE_ESBX_TABLE *
;* *
;* This module creates the correct ES:BX addresses that are *
;* used when storing tracks read from the source diskette. *
;* The routine allocates at most 80 entries in the table for *
;* double sided diskettes. *
;* *
;************************************************************************
;
Public C1700_Create_ESBX_Table
;
C1700_Create_ESBX_Table Proc Near
;
C1701:
Mov Word Ptr WRK34_DMA_OverFlow_Counter,ZERO
;
Mov Word Ptr WRK18_Counter_ESBX_Entries,Zero
Mov AX,Nine ; Calculate DI = the number of bytes
Mov BX,Sector_Size ; per track and BX = the number of
Mul BX ; paragraphs per track
Mov DI,AX ; .
Mov BX,Paragraph_Size ; .
Mov DX,Zero ; .
Div BX ; .
Mov BX,AX ; ..End
;
Cmp Byte Ptr SYS19_Major_Vers_Number,Zero
Je C1702 ; Compare for PC DOS 1.0 and 1.1
Mov AX,Word Ptr SYS21_Alloc_Segment
Jmp C1703 ; Continue
C1702:
Mov AX,CS ; Calculate the address of the 1st
Mov CL,Four ; that will be copied into memory
Shl AX,CL ; .
Add AX,Offset MEM00_Bottom_Free_Memory
Shr AX,CL ; .
Inc AX ; ..End
C1703:
Mov SI,Offset MEM03_ESBX_Table
Mov Word Ptr [SI],Zero ; Put the 1st entry into the table
Mov Word Ptr [SI+Two],AX ; ..End
C1704:
Cmp Word Ptr WRK18_Counter_ESBX_Entries,Seventy_Nine
Jae C1707 ; Calculate the ES:BX valid entries
Add SI,Four ; Get the next ES:BX table address
;
Mov AX,[SI-Two] ; Check for DMA overflow error
And AX,DMA_Boundary_Mask ; .
Shl AX,CL ; .
Add AX,DI ; .
Jnc C1705 ; ..End
;
Mov AX,[SI-Two] ; Correction for DMA overflow
Add AX,BX ; .
Mov [SI-Two],AX ; ..End
Inc Word Ptr WRK34_DMA_Overflow_Counter
C1705:
Mov AX,[SI-Two] ; Increment the ES segment address
Add AX,BX ; ..End
C1706:
Mov Word Ptr [SI],Zero ; Put the address into the table
Mov Word Ptr [SI+Two],AX ; ..End
Inc Word Ptr WRK18_Counter_ESBX_Entries
Jmp C1704 ; Go back and find another entry
C1707:
Mov AX,Word Ptr SYS05_Para_RAM_Size
Mov DX,Zero ; Divide by the number of paragraphs
Div BX ; . per track
Mov Word Ptr WRK19_Number_ESBX_Entries,AX
Mov AX,Word Ptr WRK34_DMA_Overflow_Counter
Sub Word Ptr WRK19_Number_ESBX_Entries,AX
Cmp Word Ptr WRK19_Number_ESBX_Entries,Seventy_Nine
Jb C1799 ; If less than 79, continue
Mov Word Ptr WRK19_Number_ESBX_Entries,Seventy_Nine
Mov Byte Ptr FLG17_Copy_More_Disks,True
C1799:
Ret
;
C1700_Create_ESBX_Table Endp
;
Page
;************************************************************************
;* *
;* C1800_VALIDATE_SOURCE_DISK *
;* *
;* This module determines if the source diskette is readable *
;* and whether it was formatted under PC DOS 1.0, 1.1, 2.0 or *
;* 2.1. The routine also reads the first copy of the File *
;* Allocation Table (FAT) storing it for future comparisons *
;* as well as analyzing it first entry. *
;* *
;* A series of comparisons for the number of sectors per track *
;* is done for the following reasons. All diskettes formatted *
;* under PC DOS 2.0 and 2.1 really have nine sectors. In order *
;* to obtain an eight sectored diskette, the operating system *
;* sets the first byte of the File Allocation Table (FAT) *
;* accordingly. In contrast, PC DOS 1.0 and 1.1 formats a track *
;* to have exactly eight sectors. *
;* *
;************************************************************************
;
Public C1800_Validate_Source_Disk
;
C1800_Validate_Source_Disk Proc Near
;
C1801:
Mov Byte Ptr FLG08_Good_Read,True
;
Mov AL,Byte Ptr WRK01_Source_Drive
Mov Byte Ptr WRK06_Drive_Number,AL
Mov Byte Ptr WRK07_Head_Number,Zero
Mov Byte Ptr WRK08_Track_Number,Zero
Mov Byte Ptr WRK09_Sector_Number,Nine
Mov Byte Ptr WRK10_Number_of_Sectors,One
Push CS ; Establish the address ES:BX
Pop ES ; ..End
Mov BX,Offset MEM01_File_Allocation_Table
;
Call D1000_Read_Diskette
;
Cli ; Set the number of sectors to nine
Mov Byte Ptr SYS18_Disk_Parameter_Table[Four],Nine
Sti ; .
Mov Byte Ptr WRK17_Maximum_Sectors,Nine
;
Cmp Byte Ptr FLG08_Good_Read,True
Je C1803 ; Check for good read of sector nine
Cmp Byte Ptr WRK14_Status_Operation,Sector_Error
Je C1802 ; If so, continue
Mov Byte Ptr FLG15_IO_Error,One
Call D1200_Disk_IO_Error ; Process the error
Jmp C1899 ; ..End
C1802:
Cli ; Set the number of sectors to eight
Mov Byte Ptr SYS18_Disk_Parameter_Table[Four],Eight
Sti ; .
Mov Byte Ptr WRK17_Maximum_Sectors,Eight
C1803: ; .
Mov Byte Ptr FLG08_Good_Read,True
;
Mov AL,Byte Ptr WRK01_Source_Drive
Mov Byte Ptr WRK06_Drive_Number,AL
Mov Byte Ptr WRK07_Head_Number,Zero
Mov Byte Ptr WRK08_Track_Number,Zero
Mov Byte Ptr WRK09_Sector_Number,Two
Mov Byte Ptr WRK10_Number_of_Sectors,One
Push CS ; Establish the address ES:BX
Pop ES ; ..End
Mov BX,Offset MEM01_File_Allocation_Table
;
Call D1000_Read_Diskette
;
Cmp Byte Ptr FLG08_Good_Read,True
Je C1804 ; If the read operation was
; . successful, continue
Mov Byte Ptr FLG15_IO_Error,One
Call D1200_Disk_IO_Error ; Display appropriate error message
Jmp C1899 ; Go to the end of the module
C1804:
Mov AL,Byte Ptr MEM01_File_Allocation_Table[Zero]
;
Cmp AL,One_Side_Eight_Sectors
Jne C1805 ; If not, continue
Mov Byte Ptr WRK15_Maximum_Heads,Zero
Mov Byte Ptr WRK16_Maximum_Tracks,Thirty_Nine
Mov SI,Offset MES03_Copy81_Sectors
Jmp C1809 ; Continue the processing
C1805:
Cmp AL,Two_Sides_Eight_Sectors
Jne C1806 ; If not, continue
Mov Byte Ptr WRK15_Maximum_Heads,One
Mov Byte Ptr WRK16_Maximum_Tracks,Seventy_Nine
Mov SI,Offset MES04_Copy82_Sectors
Jmp C1809 ; Continue the processing
C1806:
Cmp AL,One_Side_Nine_Sectors
Jne C1807 ; If not, continue
Mov Byte Ptr WRK15_Maximum_Heads,Zero
Mov Byte Ptr WRK16_Maximum_Tracks,Thirty_Nine
Mov SI,Offset MES05_Copy91_Sectors
Jmp C1809 ; Continue the processing
C1807:
Cmp AL,Two_Sides_Nine_Sectors
Jne C1808 ; If not, continue
Mov Byte Ptr WRK15_Maximum_Heads,One
Mov Byte Ptr WRK16_Maximum_Tracks,Seventy_Nine
Mov SI,Offset MES06_Copy92_Sectors
Jmp C1809 ; Continue the processing
C1808:
Mov Byte Ptr FLG08_Good_Read,False
Mov SI,Offset MES19_Unrecoverable_Read
Call U1000_Display_Message ; Display the message on the screen
Mov SI,Offset MES90_Unknown_FAT_Error
Call U1000_Display_Message ; Display the message on the screen
Jmp C1899 ; Go to display the message
C1809:
Cmp Byte Ptr WRK15_Maximum_Heads,Zero
Je C1810 ; If the diskette is single sided,
; . display the diskette message
Cmp Byte Ptr FLG02_Double_Side,True
Je C1810 ; If the flag indicates to copy
; . both sides of the diskette,
; . then continue
Mov Byte Ptr WRK15_Maximum_Heads,Zero
Mov Byte Ptr WRK16_Maximum_Tracks,Thirty_Nine
C1810:
Mov AL,Byte Ptr WRK01_Source_Drive
Mov Byte Ptr WRK06_Drive_Number,AL
Mov Byte Ptr WRK07_Head_Number,One
Mov Byte Ptr WRK08_Track_Number,Zero
Mov Byte Ptr WRK09_Sector_Number,One
Mov Byte Ptr WRK10_Number_of_Sectors,One
Push CS ; Establish the ES segment register
Pop ES ; .
Push ES ; ..End
Mov BX,Offset MEM00_Bottom_Free_Memory
Cmp SYS19_Major_Vers_Number,Zero
Je C1811 ; If PC DOS 1.0 or 1.1, continue;
; . otherwise, setup ES:BX a little
Mov ES,Word Ptr SYS21_Alloc_Segment
Mov BX,Zero ; . differently
C1811:
Call D1000_Read_Diskette
Pop ES ; Restore ES in any case
;
Cmp Byte Ptr FLG08_Good_Read,True
Je C1813 ; Go to display the message
Cmp Byte Ptr WRK15_Maximum_Heads,One
Je C1812 ; If double sided diskette, error!!!
Mov Byte Ptr FLG08_Good_Read,True
Mov Byte Ptr FLG02_Double_Side,False
Jmp C1813 ; Display the appropriate message
C1812:
Mov SI,Offset MES19_Unrecoverable_Read
Call U1000_Display_Message ; Display the message on the screen
Mov SI,Offset MES91_Single_Side_Error
Call U1000_Display_Message ; Display the message on the screen
Jmp C1899 ; Go to the end of the module
C1813:
Call U1000_Display_Message ; Display the message on the screen
C1899:
Ret
;
C1800_Validate_Source_Disk Endp
;
Page
;************************************************************************
;* *
;* C1900_CREATE_CHRN_TABLE *
;* *
;* This module creates the CHRN table to be used in case the *
;* target diskette needs to be formatted. The abbreviation *
;* stands for C = track number, H = head number, R = sector *
;* number and N = a code for the number of bytes per sector. *
;* *
;************************************************************************
;
Public C1900_Create_CHRN_Table
;
C1900_Create_CHRN_Table Proc Near
;
C1901:
Mov BH,Byte Ptr WRK15_Maximum_Heads
Mov BL,Byte Ptr WRK16_Maximum_Tracks
Mov AL,Nine
;
Mov CL,BH ; Establish correct track number
Shr BL,CL ; ..End
;
Mov DL,Two ; . DL = number of sectors
Mov DH,Zero ; . DH = head number
Mov CH,Zero ; . CH = track number
Mov CL,One ; . CL = sector number
Mov SI,Offset MEM02_CHRN_Table; Set up initial registers
C1902:
Mov [SI],CH ; Establish an entry in the CHRN
Mov [SI+One],DH ; . table
Mov [SI+Two],CL ; .
Mov [SI+Three],DL ; ..End
;
Add SI,Four ; Get the addr of next CHRN entry
Inc CL ; Increment the sector number
Cmp CL,AL ; Compare for maximum sectors
Jbe C1902 ; If not, go back and try again
;
Mov CL,One ; Initialize sector number
Inc DH ; Increment the head number
Cmp DH,BH ; Compare for maximum heads
Jbe C1902 ; If not, go back and try again
;
Mov CL,One ; Initialize sector number
Mov DH,Zero ; Initialize head number
Inc CH ; Increment the track number
Cmp CH,BL ; Compare for maximum tracks
Jbe C1902 ; If not, go back and try again
C1999:
Ret
;
C1900_Create_CHRN_Table Endp
;
Page
;************************************************************************
;* *
;* C2000_READ_SOURCE_DISK *
;* *
;* This module reads a diskette track by track until it fills *
;* all of available memory specified by the ES:BX table. The *
;* processing sequence is: *
;* *
;* 1. Initializes the SI resgister to point to the correct entry *
;* in the ES:BX table. *
;* *
;* 2. Prints the initial read message on the screen. *
;* *
;* 3. Compares for the end of the ES:BX table and/or the number *
;* of tracks on the diskette. If not, continue. If so, *
;* return to B1100_Detail_Processing. *
;* *
;* 4. Reads a track from the source diskette. *
;* *
;* 5. Displays the track and head numbers on the screen. *
;* *
;* 6. Transfers control to 3. *
;* *
;************************************************************************
;
Page
;
Public C2000_Read_Source_Disk
;
C2000_Read_Source_Disk Proc Near
;
C2001:
Mov Byte Ptr FLG08_Good_Read,True
;
Mov SI,Offset MEM03_ESBX_Table
Mov Word Ptr WRK18_Counter_ESBX_Entries,Zero
;
Cmp Byte Ptr FLG13_First_Read_Write,False
Je C2002 ; If not first time, continue
Mov Byte Ptr WRK31_Track_Read_Counter,Zero
Jmp C2003 ; Go to display the message
C2002:
Cmp Byte Ptr FLG04_Single_Drive,False
Je C2004 ; If double drive copy, continue
C2003:
Push SI ; Save SI = Addr of ES:BX table
Mov SI,Offset MES97_Return_Linefeed
Call U1000_Display_Message ; Display a return and linefeed
Mov SI,Offset MES17_Reading_Track
Mov AL,Byte Ptr WRK21_Current_Source_Track
Call U1300_Convert_Binary_to_ASCII
Mov [SI+Fifteen],AX ; Put the track number into message
Mov AL,Byte Ptr WRK20_Current_Source_Head
Call U1300_Convert_Binary_to_ASCII
Mov [SI+Twenty_Five],AL ; Put the head number into message
Call U1000_Display_Message ; Display the message on the screeen
;
Mov AH,Read_Cursor_Command ; Get the current cursor position
Mov BH,Byte Ptr SYS03_Active_Page
Int Video_Interrupt ; ..End
;
Dec DH ; Save the row of the read track and
Mov Byte Ptr WRK24_Read_Message_Row,DH; . head message
;
Pop SI ; Restore SI = Addr of ES:BX table
C2004:
Mov AL,Byte Ptr WRK31_Track_Read_Counter
Cmp AL,Byte Ptr WRK16_Maximum_Tracks
Jbe C2005 ; If more tracks, then continue
Jmp C2099 ; Go to the end of the module
C2005:
Mov AX,Word Ptr WRK18_Counter_ESBX_Entries
Cmp AX,Word Ptr WRK19_Number_ESBX_Entries
Jbe C2006 ; If more memory exists, continue
Jmp C2099 ; Go to the end of the module
C2006:
; ; Display the current track and head
Mov AL,Byte Ptr WRK24_Read_Message_Row
Mov Byte Ptr WRK28_Current_Message_Row,AL
Mov AL,Byte Ptr WRK20_Current_Source_Head
Mov Byte Ptr WRK29_Current_Head,AL
Mov AL,Byte Ptr WRK21_Current_Source_Track
Mov Byte Ptr WRK30_Current_Track,AL
;
Call U1400_Display_Head_and_Track
;
; Establish the disk parameters
Mov AL,Byte Ptr WRK01_Source_Drive
Mov Byte Ptr WRK06_Drive_Number,AL
Mov AL,Byte Ptr WRK20_Current_Source_Head
Mov Byte Ptr WRK07_Head_Number,AL
Mov AL,Byte Ptr WRK21_Current_Source_Track
Mov Byte Ptr WRK08_Track_Number,AL
Mov Byte Ptr WRK09_Sector_Number,One
Mov AL,Byte Ptr WRK17_Maximum_Sectors
Mov Byte Ptr WRK10_Number_of_Sectors,AL
Mov AX,DS:[SI] ; .
Mov BX,AX ; .
Mov AX,DS:[SI+Two] ; .
Mov ES,AX ; ..End
;
Call D1000_Read_Diskette ; Read the source diskette
C2007:
Cmp Byte Ptr FLG08_Good_Read,True
Je C2008 ; If the read operation was
; . successful, then continue
Mov Byte Ptr FLG15_IO_Error,One
Call D1200_Disk_IO_Error ; Display appropriate error message
Jmp C2099 ; Go to the end of the module
C2008:
Inc Byte Ptr WRK31_Track_Read_Counter
Inc Word Ptr WRK18_Counter_ESBX_Entries
Add SI,Four ; Increment addr of the ES:BX table
Cmp Byte Ptr FLG02_Double_Side,False
Je C2009 ; If single sided, then continue
Inc Byte Ptr WRK20_Current_Source_Head
Cmp Byte Ptr WRK20_Current_Source_Head,One
Jbe C2010 ; If the head number is less than or
; . equal to one, then continue
Mov Byte Ptr WRK20_Current_Source_Head,Zero
C2009:
Inc Byte Ptr WRK21_Current_Source_Track
C2010:
Jmp C2004 ; Go back and read another track
C2099:
Ret
;
C2000_Read_Source_Disk Endp
;
Page
;************************************************************************
;* *
;* C2100_WRITE_FORMAT_TARGET_DISK *
;* *
;* This module formats and writes a diskette track by track *
;* until it fills all of available memory specified by the *
;* ES:BX table. The processing sequence is: *
;* *
;* 1. Initializes the SI resgister to point to the correct entry *
;* in the ES:BX table. *
;* *
;* 2. Prints the initial write message on the screen. *
;* *
;* 3. Compares for the end of the ES:BX table and/or the number *
;* of tracks on the diskette. If not, continue. If so, *
;* return to B1100_Detail_Processing. *
;* *
;* 4. Writes a track from the source diskette. *
;* *
;* 5. Displays the track and head numbers on the screen. *
;* *
;* 6. Transfers control to 3. *
;* *
;************************************************************************
;
Public C2100_Write_Format_Target_Disk
;
C2100_Write_Format_Target_Disk Proc Near
;
C2101:
Mov Byte Ptr FLG09_Good_Write,True
Mov Byte Ptr FLG11_Good_Format,True
;
Mov Byte Ptr WRK13_Retry_Counter,Number_of_Retries
;
Mov SI,Offset MEM03_ESBX_Table
Mov Word Ptr WRK18_Counter_ESBX_Entries,Zero
;
Cmp Byte Ptr FLG13_First_Read_Write,False
Je C2102 ; If not first time, continue
Mov Byte Ptr WRK32_Track_Write_Counter,Zero
Jmp C2103 ; Go to display the message
C2102:
Cmp Byte Ptr FLG04_Single_Drive,False
Je C2104 ; If double drive copy, continue
C2103:
Push SI ; Save SI = Addr of ES:BX table
;
Mov SI,Offset MES97_Return_Linefeed
Call U1000_Display_Message ; Display return and line feed
Mov SI,Offset MES23_Writing_Track
Call U1000_Display_Message ; Display write track message
;
Mov AH,Read_Cursor_Command ; Get the current cursor position
Mov BH,Byte Ptr SYS03_Active_Page
Int Video_Interrupt ; ..End
;
Dec DH ; Save the row of the I/O track and
Mov Byte Ptr WRK27_Write_Message_Row,DH; . head information
Sub DH,Two ; .
Mov Byte Ptr WRK24_Read_Message_Row,DH
;
Pop SI ; Restore SI = Addr of ES:BX table
C2104:
Mov AL,Byte Ptr WRK32_Track_Write_Counter
Cmp AL,Byte Ptr WRK16_Maximum_Tracks
Jbe C2105 ; If more tracks, then continue
Mov Byte Ptr FLG14_Copy_Complete,True
Jmp C2199 ; Go to the end of the module
C2105:
Mov AX,Word Ptr WRK18_Counter_ESBX_Entries
Cmp AX,Word Ptr WRK19_Number_ESBX_Entries
Jbe C2106 ; If more memory exists, continue
Jmp C2199 ; Go to the end of the module
C2106:
; ; Establish the disk parameters
Mov AL,Byte Ptr WRK02_Target_Drive
Mov Byte Ptr WRK06_Drive_Number,AL
Mov AL,Byte Ptr WRK22_Current_Target_Head
Mov Byte Ptr WRK07_Head_Number,AL
Mov AL,Byte Ptr WRK23_Current_Target_Track
Mov Byte Ptr WRK08_Track_Number,AL
Mov Byte Ptr WRK09_Sector_Number,One
Mov AL,Byte Ptr WRK17_Maximum_Sectors
Mov Byte Ptr WRK10_Number_of_Sectors,AL
Mov AX,DS:[SI+Two] ; .
Mov Word Ptr WRK11_Segment_Address,AX
Mov AX,DS:[SI] ; .
Mov Word Ptr WRK12_Offset_Address,AX
;
Call D1100_Write_Format_Diskette
;
Cmp Byte Ptr FLG11_Good_Format,True
Je C2107 ; If a good format, continue
Cmp Byte Ptr FLG09_Good_Write,True
Je C2107 ; If a good write, continue
Call D1200_Disk_IO_Error ; Display appropriate error message
Jmp C2199 ; Go to the end of the module
C2107:
Inc Byte Ptr WRK32_Track_Write_Counter
Inc Word Ptr WRK18_Counter_ESBX_Entries
Add SI,Four ; Increment addr of the ES:BX table
Cmp Byte Ptr FLG02_Double_Side,False
Je C2108 ; If single sided, then continue
Inc Byte Ptr WRK22_Current_Target_Head
Cmp Byte Ptr WRK22_Current_Target_Head,One
Jbe C2109 ; If the head number is less than or
; . equal to one, then continue
Mov Byte Ptr WRK22_Current_Target_Head,Zero
C2108:
Inc Byte Ptr WRK23_Current_Target_Track
C2109:
Jmp C2104 ; Go back and write another track
C2199:
Ret
;
C2100_Write_Format_Target_Disk Endp
;
Page
;************************************************************************
;* *
;* C2200_CHECK_FILE_ALLOC_TABLE *
;* *
;* This module checks the File Allocation Table (FAT) of the *
;* diskette in the source drive and compares it with the File *
;* Allocation Table (FAT) of the original source diskette. If *
;* there are any differences, the program sets the flag *
;* FLG12_Good_FAT to False; otherwise, the flag is True. *
;* *
;************************************************************************
;
Public C2200_Check_File_Alloc_Table
;
C2200_Check_File_Alloc_Table Proc Near
;
C2201:
Mov Byte Ptr FLG12_Good_FAT,True
;
Mov AL,Byte Ptr WRK01_Source_Drive
Mov Byte Ptr WRK06_Drive_Number,AL
Mov Byte Ptr WRK07_Head_Number,Zero
Mov Byte Ptr WRK08_Track_Number,Zero
Mov Byte Ptr WRK09_Sector_Number,Two
Mov Byte Ptr WRK10_Number_of_Sectors,One
Push CS ; Establish the ES segment register
Pop ES ; .
Push ES ; ..End
Mov BX,Offset MEM00_Bottom_Free_Memory
Cmp SYS19_Major_Vers_Number,Zero
Je C2202 ; If PC DOS 1.0 or 1.1, continue;
; . otherwise, set up ES:BX a little
Mov ES,Word Ptr SYS21_Alloc_Segment
Mov BX,Zero ; . differently
C2202:
Call D1000_Read_Diskette ; Read the File Allocation Table
Pop ES ; Restore ES in any case
;
Cmp Byte Ptr FLG08_Good_Read,True
Je C2203 ; If the read operation was
; . successful, continue
Mov Byte Ptr FLG15_IO_Error,One
Call D1200_Disk_IO_Error ; Display appropriate error message
Jmp C2299 ; Go to the end of the module
C2203:
Mov SI,Offset MEM01_File_Allocation_Table
Mov DI,Offset MEM00_Bottom_Free_Memory
Push ES ; Save ES for a moment
Cmp Byte Ptr SYS19_Major_Vers_Number,Zero
Je C2204 ; If PC DOS 1.0 or 1.1, continue
Mov ES,Word Ptr SYS21_Alloc_Segment
Mov DI,Zero ; Set up ES:DI for PC DOS 2.0+
C2204:
Mov CX,Sector_Size ; Set counter CX to compare the
; . sector size in words
Shr CX,1 ; ..End
Cld ; Clear the direction flag
Rep Cmpsw ; Compare all of the 512 bytes
Jne C2205 ; If there is a discrepancy, go to
; . the error message routine
Jmp C2206 ; Go to the end of the module
C2205:
Pop ES ; Restore the ES register
Mov Byte Ptr FLG12_Good_FAT,False
Mov SI,Offset MES19_Unrecoverable_Read
Call U1000_Display_Message ; Display the message on the screen
Mov SI,Offset MES90_Unknown_FAT_Error
Call U1000_Display_Message ; Display the message on the screen
Jmp C2299 ; Go to the end of the module
C2206:
Pop ES ; Restore the ES register
C2299:
Ret
;
C2200_Check_File_Alloc_Table Endp
;
Page
;************************************************************************
;* *
;* C2300_FREE_MEMORY *
;* *
;* This module free up allocated memory, provided that a user *
;* is running PC DOS 2.0 or greater; otherwise, it does nothing. *
;* *
;************************************************************************
;
Public C2300_Free_Memory
;
C2300_Free_Memory Proc Near
;
C2301:
Cmp Byte Ptr SYS19_Major_Vers_Number,Zero
Je C2399 ; If PC DOS 1.0 or 1.1, go to the
; . end of the module
Cmp Byte Ptr FLG16_Free_Memory,True
Je C2399 ; If memory was not allocated, go
; . to the end of the module
;
Mov AH,Free_Memory ; Free allocated memory
Push ES ; .
Mov ES,Word Ptr SYS21_Alloc_Segment
Int PC_DOS_Interrupt ; .
Pop ES ; .
Jnc C2399 ; ..End
;
Mov SI,Offset MES97_Return_Linefeed
Call U1000_Display_Message ; Issue a carriage return/linefeed
Mov SI,Offset MES99_Memory_Block_Destroyed
Call U1000_Display_Message ; Display the message on the screen
C2399:
Ret
;
C2300_Free_Memory Endp
;
Page
;************************************************************************
;* *
;* D1000_READ_DISKETTE *
;* *
;* This module reads a track at a time from a diskette. If it *
;* fails to read the diskette it tries Number_of_Retries = 5 *
;* times. *
;* *
;************************************************************************
;
Public D1000_Read_Diskette
;
D1000_Read_Diskette Proc Near
;
D1001:
Mov Byte Ptr WRK13_Retry_Counter,Number_of_Retries
D1002:
Clc ; Clear the carry flag
Mov AH,Read_Command ; Read the data on the diskette
Mov DL,Byte Ptr WRK06_Drive_Number
Mov DH,Byte Ptr WRK07_Head_Number
Mov CH,Byte Ptr WRK08_Track_Number
Mov CL,Byte Ptr WRK09_Sector_Number
Mov AL,Byte Ptr WRK10_Number_of_Sectors
Int Disk_Interrupt ; ..End
;
Mov Byte Ptr WRK14_Status_Operation,AH
Jnc D1099 ; Go to the end of the module
D1003:
Dec Byte Ptr WRK13_Retry_Counter
Jz D1004 ; Could not read the diskette
Clc ; Clear the carry flag
Mov AH,Reset_Command ; Initialize the disk controller
Int Disk_Interrupt ; .
Mov Byte Ptr WRK14_Status_Operation,AH
Jnc D1002 ; .
Jmp D1003 ; ..End
D1004:
Mov Byte Ptr FLG08_Good_Read,False
D1099:
Ret
;
D1000_Read_Diskette Endp
;
Page
;************************************************************************
;* *
;* D1100_WRITE_FORMAT_DISKETTE *
;* *
;* This module formats and writes a track at a time to a *
;* diskette. If it fails to format or a write a track, it tries *
;* Number_of_Retries = 5 times. *
;* *
;************************************************************************
;
Public D1100_Write_Format_Diskette
;
D1100_Write_Format_Diskette Proc Near
;
D1101:
Mov Byte Ptr WRK13_Retry_Counter,Number_of_Retries
D1102:
Clc ; Clear the carry flag
Mov AH,Format_Command ; Format the diskette
Mov DL,Byte Ptr WRK06_Drive_Number
Mov DH,Byte Ptr WRK07_Head_Number
Mov CH,Byte Ptr WRK08_Track_Number
Mov CL,Byte Ptr WRK09_Sector_Number
Mov AL,Byte Ptr WRK10_Number_of_Sectors
Push CS ; .
Pop ES ; .
Mov BX,Word Ptr WRK33_CHRN_Table_Address
Int Disk_Interrupt ; ..End
Mov Byte Ptr WRK14_Status_Operation,AH
Jnc D1105 ; Formatted the diskette
D1103:
Dec Byte Ptr WRK13_Retry_Counter
Jz D1104 ; Go to format error processing
Clc ; Clear the carry flag
Mov AH,Reset_Command ; Initialize the disk controller
Int Disk_Interrupt ; .
Mov Byte Ptr WRK14_Status_Operation,AH
Jnc D1102 ; Try to format the disk again
Jmp D1103 ; Try to initialize the disk again
D1104:
Mov Byte Ptr FLG15_IO_Error,Zero
Mov Byte Ptr FLG11_Good_Format,False
Jmp D1199 ; Go to the end of the module
D1105:
Mov Byte Ptr WRK13_Retry_Counter,Number_of_Retries
D1106:
Clc ; Clear the carry flag
Mov AH,Write_Command ; Write the diskette
Mov ES,Word Ptr WRK11_Segment_Address
Mov BX,Word Ptr WRK12_Offset_Address
Mov AL,Byte Ptr WRK10_Number_of_Sectors
Int Disk_Interrupt ; .
Mov Byte Ptr WRK14_Status_Operation,AH
Jnc D1109 ; ..End
D1107:
Dec Byte Ptr WRK13_Retry_Counter
Jz D1108 ; Go to write error processing
Clc ; Clear the carry flag
Mov AH,Reset_Command ; Initialize the disk controller
Int Disk_Interrupt ; .
Mov Byte Ptr WRK14_Status_Operation,AH
Jnc D1106 ; .
Jmp D1107 ; ..End
D1108:
Mov Byte Ptr FLG15_IO_Error,Two
Mov Byte Ptr FLG09_Good_Write,False
Jmp D1199 ; Go to the end of the module
D1109:
Add Word Ptr WRK33_CHRN_Table_Address,Thirty_Six
;
Mov AL,Byte Ptr WRK27_Write_Message_Row
Mov Byte Ptr WRK28_Current_Message_Row,AL
Mov AL,Byte Ptr WRK22_Current_Target_Head
Mov Byte Ptr WRK29_Current_Head,AL
Mov AL,Byte Ptr WRK23_Current_Target_Track
Mov Byte Ptr WRK30_Current_Track,AL
Call U1400_Display_Head_and_Track
D1199:
Ret
;
D1100_Write_Format_Diskette Endp
;
Page
;************************************************************************
;* *
;* D1200_DISK_IO_ERROR *
;* *
;* This module fans out a disk error. It tells a user if it *
;* occured on a read, format or write operation. If it cannot *
;* determine the nature of the error, the routine displays an *
;* unknown disk error message. *
;* *
;************************************************************************
;
Public D1200_Disk_IO_Error
;
D1200_Disk_IO_Error Proc Near
;
D1201:
Cmp Byte Ptr WRK14_Status_Operation,Time_Out_Error
Jne D1202 ; If not time out error, continue
Mov SI,Offset MES08_Drive_Not_Ready
Mov AL,Byte Ptr WRK06_Drive_Number
Add AL,Capital_Letter_A ; Convert drive number to a letter
Mov [SI+Twenty_Four],AL ; Put the drive letter into position
Call U1000_Display_Message
Jmp D1299 ; Go to the end of the module
D1202:
Cmp Byte Ptr FLG15_IO_Error,Zero
Jne D1203 ; If not a format error, continue
Mov SI,Offset MES18_Unrecoverable_Format
Jmp D1206 ; Continue processing
D1203:
Cmp Byte Ptr FLG15_IO_Error,One
Jne D1204 ; If not a read error, continue
Mov SI,Offset MES19_Unrecoverable_Read
Jmp D1206 ; Continue processing
D1204:
Cmp Byte Ptr FLG15_IO_Error,Two
Jne D1205 ; If not a write error, continue
Mov SI,Offset MES21_Unrecoverable_Write
Jmp D1206 ; Continue processing
D1205:
Mov SI,Offset MES22_Unrecoverable_IO
D1206:
Call U1000_Display_Message ; Display the message on the screen
D1207:
Cmp Byte Ptr WRK14_Status_Operation,Seek_Error
Jne D1208 ; If not a seek error, continue
Mov SI,Offset MES80_Seek_Error
Jmp D1217 ; Continue processing
D1208:
Cmp Byte Ptr WRK14_Status_Operation,Controller_Error
Jne D1209 ; If not a controller error, continue
Mov SI,Offset MES81_Controller_Error
Jmp D1217 ; Continue processing
D1209:
Cmp Byte Ptr WRK14_Status_Operation,CRC_Error
Jne D1210 ; If not a CRC error, continue
Mov SI,Offset MES82_CRC_Error
Jmp D1217 ; Continue processing
D1210:
Cmp Byte Ptr WRK14_Status_Operation,DMA_Boundary_Error
Jne D1211 ; If not DMA boundary error, continue
Mov SI,Offset MES83_DMA_Boundary_Error
Jmp D1217 ; Continue processing
D1211:
Cmp Byte Ptr WRK14_Status_Operation,DMA_Error
Jne D1212 ; If not a DMA error, continue
Mov SI,Offset MES84_DMA_Error
Jmp D1217 ; Continue processing
D1212:
Cmp Byte Ptr WRK14_Status_Operation,Sector_Error
Jne D1213 ; If not a sector error, continue
Mov SI,Offset MES85_Sector_Error
Jmp D1217 ; Continue processing
D1213:
Cmp Byte Ptr WRK14_Status_Operation,Write_Protect_Error
Jne D1214 ; If not write protected, continue
Mov SI,Offset MES86_Write_Protect_Error
Jmp D1217 ; Continue processing
D1214:
Cmp Byte Ptr WRK14_Status_Operation,Address_Mark_Error
Jne D1215 ; If not addr mark error, continue
Mov SI,Offset MES87_Address_Mark_Error
Jmp D1217 ; Continue processing
D1215:
Cmp Byte Ptr WRK14_Status_Operation,Command_Error
Jne D1216 ; If not a command error, continue
Mov SI,Offset MES88_Command_Error
Jmp D1217 ; Continue processing
D1216:
Mov SI,Offset MES89_Unknown_Error
D1217:
Call U1000_Display_Message ; Display the message on the screen
D1299:
Ret
;
D1200_Disk_IO_Error Endp
;
Page
;************************************************************************
;* *
;* S1000_SETUP_DISK_PARAM_TABLE *
;* *
;* This module sets up the Disk Parameter Table (Int 1EH) so that *
;* it points to the disk parameters for PC DOS 2.1 contained in *
;* this program. *
;* *
;************************************************************************
;
Public S1000_Setup_Disk_Param_Table
;
S1000_Setup_Disk_Param_Table Proc Near
;
S1001:
Push AX ; Save the registers
Push BX ; .
Push DS ; ..End
;
Cli ; Turn off the interrupts
;
Sub AX,AX ; Initialize DS to Absolute Zero
Mov DS,AX ; ..End
;
Mov BX,Disk_Parameter_Addr ; Save and redirect the address
Mov AX,[BX] ; .
Mov Word Ptr CS:SYS16_Save_DPT_Offset,AX
Mov AX,[BX+Two] ; .
Mov Word Ptr CS:SYS17_Save_DPT_Segment,AX
; .
Mov AX,Offset SYS18_Disk_Parameter_Table
Mov [BX],AX ; .
Mov AX,CS ; .
Mov [BX+Two],AX ; ..End
;
Sti ; Turn on interrupts
;
Pop DS ; Restore the registers
Pop BX ; .
Pop AX ; ..End
S1099:
Ret
;
S1000_Setup_Disk_Param_Table Endp
;
Page
;************************************************************************
;* *
;* S1100_RESTORE_DISK_PARAM_TABLE *
;* *
;* This module restores the Disk Parameter Table to its original *
;* address in PC DOS. *
;* *
;************************************************************************
;
Public S1100_Restore_Disk_Param_Table
;
S1100_Restore_Disk_Param_Table Proc Near
;
S1101:
Push AX ; Save the registers
Push BX ; .
Push DS ; ..End
;
Cli ; Turn off the interrupts
;
Sub AX,AX ; Initialize DS to Absolute Zero
Mov DS,AX ; ..End
;
Mov BX,Disk_Parameter_Addr ; Restore Disk Parameter Address
Mov AX,Word Ptr CS:SYS16_Save_DPT_Offset
Mov [BX],AX ; .
Mov AX,Word Ptr CS:SYS17_Save_DPT_Segment
Mov [BX+Two],AX ; ..End
;
Sti ; Turn on the interrupts
;
Pop DS ; Restore the registers
Pop BX ; .
Pop AX ; ..End
S1199:
Ret
;
S1100_Restore_Disk_Param_Table Endp
;
Page
;************************************************************************
;* *
;* S1200_GET_VERSION_NUMBER *
;* *
;* This module gets the current version number of PC DOS and *
;* stores the information in determining whether to allocate *
;* memory using the PC DOS 2.0 function calls. *
;* *
;************************************************************************
;
Public S1200_Get_Version_Number
;
S1200_Get_Version_Number Proc Near
;
S1201:
Push AX ; Save the registers and flags
Pushf ; ..End
;
Mov AH,Get_DOS_Version_Number
Int PC_DOS_Interrupt
Mov Byte Ptr SYS19_Major_Vers_Number,AL
Mov Byte Ptr SYS20_Minor_Vers_Number,AH
;
Popf ; Restore the registers and flags
Pop AX ; ..End
S1299:
Ret
;
S1200_Get_Version_Number Endp
;
Page
;************************************************************************
;* *
;* U1000_DISPLAY_MESSAGE *
;* *
;* This module displays a message on the screen. Before calling *
;* this module, the offset of the message should be in SI *
;* relative to the DS register. This routine preserves the *
;* registers and the flags. *
;* *
;************************************************************************
;
Public U1000_Display_Message
;
U1000_Display_Message Proc Near
;
U1001:
Push AX ; Save the registers and flags
Push BX ; .
Push SI ; .
Pushf ; ..End
U1002:
Mov AL,[SI] ; Put the character into AL
Cmp AL,EOT ; Compare for the end of the string
Je U1090 ; If so, go to end of the module
Mov AH,Write_TTY_Command ; Write the Character
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
Inc SI ; Increment the SI counter
Jmp U1002 ; Go back and try again
U1090:
Popf ; Restore the registers and flags
Pop SI ; .
Pop BX ; .
Pop AX ; ..End
U1099:
Ret
;
U1000_Display_Message Endp
;
Page
;************************************************************************
;* *
;* U1100_GET_RESPONSE *
;* *
;* This module gets the response from the keyboard and displays *
;* the information on the video display unit. The keyboard *
;* buffer is WRK05_Keyboard_Buffer. The first byte of this *
;* buffer contains the length of the buffer and must be less *
;* than or equal to 80 characters. The next 80 characters are *
;* the acutal buffer. The character EOT denotes the end of the *
;* buffer and can occur in any one of the 80 characters. *
;* *
;************************************************************************
;
Public U1100_Get_Response
;
U1100_Get_Response Proc Near
;
U1101:
Push AX ; Save the registers and flags
Push BX ; .
Push CX ; .
Push SI ; .
Pushf ; ..End
U1102:
Mov SI,Offset WRK05_Keyboard_Buffer+1
Mov CX,NUL ; Initialize the CX counter register
U1103:
Mov AH,Flush_Keyboard_Command; Read the character from keyboard
Mov AL,Read_Keyboard_Command; .
Int PC_DOS_Interrupt ; ..End
Cmp AL,ETX ; Compare for a control break
Jne U1104 ; If not, then continue
Mov SI,Offset MES98_Control_Break
Call U1000_Display_Message ; Display the message on the screen
Jmp A1002 ; Go to B1200_Final_Process
U1104:
Cmp Byte Ptr FLG05_Store_Buffer,True
Je U1105 ; If store keyboard entries, continue
Jmp U1190 ; If not, go to end of the module
U1105:
Cmp AL,BS ; Is AL a backspace character???
Jne U1106 ; If not, continue processing AL
Cmp CX,NUL ; Is the cursor at column zero????
Je U1103 ; Yes, so get another character
Dec CX ; Decrement CX to point to the
; . previous cursor location
Dec SI ; Decrement SI to go back to the
; . previos buffer location
;
Mov AH,Write_TTY_Command ; Write a backspace to the screen
Mov AL,BS ; .
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
;
Mov AH,Write_TTY_Command ; Write a space to the screen
Mov AL,Space ; .
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
;
Mov AH,Write_TTY_Command ; Write a backspace to the screen
Mov AL,BS ; .
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
;
Jmp U1103 ; Go back and get another character
U1106:
Cmp AL,CR ; Compare char for a carriage return
Je U1108 ; If so, insert an EOT into buffer
Cmp CX,Keyboard_Buffer_Size ; Check for keyboard buffer full
Jae U1107 ; If so, sound bell and get new char
Mov [SI],AL ; Put the character into the buffer
Inc SI ; Increment the keyboard address
Inc CX ; Increment the CX character counter
Jmp U1103 ; Go back and get another character
U1107:
Mov AH,Write_TTY_Command ; Sound the beep from the screen
Mov AL,Bell ; .
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
Jmp U1103 ; Go back and get another character
U1108:
Mov AL,EOT ; Put an EOT into the buffer
Mov [SI],AL ; ..End
;
Mov AH,Write_TTY_Command ; Write a carriage return to the
Mov AL,CR ; . screen
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
;
Mov AH,Write_TTY_Command ; Write a line feed to the screen
Mov AL,LF ; .
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
;
Mov WRK05_Keyboard_Buffer[0],CL; Set the length accrodingly
U1190:
Popf ; Restore the registers and flags
Pop SI ; .
Pop CX ; .
Pop BX ; .
Pop AX ; ..End
U1199:
Ret
U1100_Get_Response Endp
;
Page
;************************************************************************
;* *
;* U1200_GET_YES_OR_NO *
;* *
;* This module asks for a [Yy]es or [Nn]o answer from a user. The *
;* routine accepts only a [Yy] or [Nn] and exists with the flag *
;* FLG06_Yes_or_No set to True for YES and False for NO. *
;* *
;************************************************************************
;
Public U1200_Get_Yes_or_No
;
U1200_Get_Yes_or_No Proc Near
;
U1201:
Push AX ; Save the registers and flags
Push SI ; .
Pushf ; ..End
U1202:
Mov AH,Flush_Keyboard_Command; Read the character from keyboard
Mov AL,Read_Keyboard_Command; .
Int PC_DOS_Interrupt ; ..End
Cmp AL,ETX ; Compare for control break
Jne U1203 ; If not, then continue
Mov SI,Offset MES98_Control_Break
Call U1000_Display_Message ; Display the message on the screen
Jmp A1002 ; Go to B1200_Final_Process
U1203:
Cmp AL,Capital_Letter_Y ; Check for capital letter Y
Jne U1204 ; ..End
Mov Byte Ptr FLG06_Yes_or_No,True
Mov SI,Offset MES24_Yes ; Display YES on the screen
Call U1000_Display_Message ; ..End
Jmp U1290 ; Go to the end of the module
U1204:
Cmp AL,Small_Letter_y ; Check for small letter y
Jne U1205 ; ..End
Mov Byte Ptr FLG06_Yes_or_No,True
Mov SI,Offset MES24_Yes ; Display YES on the screen
Call U1000_Display_Message ; ..End
Jmp U1290 ; Go to the end of the module
U1205:
Cmp AL,Capital_Letter_N ; Check for capital letter N
Jne U1206 ; ..End
Mov Byte Ptr FLG06_Yes_or_No,False
Mov SI,Offset MES25_No ; Display NO on the screen
Call U1000_Display_Message ; ..End
Jmp U1290 ; Go to the end of the module
U1206:
Cmp AL,Small_Letter_n ; Check for small letter n
Jne U1207 ; ..End
Mov Byte Ptr FLG06_Yes_or_No,False
Mov SI,Offset MES25_No ; Display NO on the screen
Call U1000_Display_Message ; ..End
Jmp U1290 ; Go to the end of the module
U1207:
Jmp U1202 ; Go back and get another character
U1290:
Popf ; Restore the registers and flags
Pop SI ; .
Pop AX ; ..End
U1299:
Ret
;
U1200_Get_Yes_or_No Endp
;
Page
;************************************************************************
;* *
;* U1300_CONVERT_BINARY_TO_ASCII *
;* *
;* This module BCD contained in the AL register into an ASCII *
;* character. The output is returned in the AX register. *
;* *
;************************************************************************
;
Public U1300_Convert_Binary_to_ASCII
;
U1300_Convert_Binary_to_ASCII Proc Near
;
U1301:
Push DX ; Save the registers
Pushf ; ..End
;
Cbw ; Perform sign extension for division
Mov DL,Ten ; Set DL disvisor to 10D
Div DL ; Divide AL by 10D remainder in AH
Add AL,Zero_Digit ; Setup the characters in AL & AH
Add AH,Zero_Digit ; ..End
;
Popf ; Restore the registers
Pop DX ; ..End
U1399:
Ret
;
U1300_Convert_Binary_to_ASCII Endp
;
Page
;************************************************************************
;* *
;* U1400_DISPLAY_HEAD_AND_TRACK *
;* *
;* This module displays the current track and head number that *
;* is being read from the source diskette or written to the *
;* target diskette. *
;* *
;************************************************************************
;
Public U1400_Display_Head_and_Track
;
U1400_Display_Head_and_Track Proc Near
;
U1401:
Push AX ; Save the registers
Push BX ; .
Push DX ; .
Pushf ; ..End
;
Mov AH,Set_CPos_Command ; Set cursor to track position
Mov BH,Byte Ptr SYS03_Active_Page
Mov DH,Byte Ptr WRK28_Current_Message_Row
Mov DL,Fifteen ; .
Int Video_Interrupt ; ..End
;
; Write the current track number
Mov AL,Byte Ptr WRK30_Current_Track
Call U1300_Convert_Binary_to_ASCII
Push AX ; .
Mov AH,Write_TTY_Command ; .
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; .
Pop AX ; .
Mov AL,AH ; .
Mov AH,Write_TTY_Command ; .
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
;
Mov AH,Set_CPos_Command ; Set cursor to head position
Mov BH,Byte Ptr SYS03_Active_Page
Mov DH,Byte Ptr WRK28_Current_Message_Row
Mov DL,Twenty_Five ; .
Int Video_Interrupt ; ..End
; ; Write the current head number
Mov AL,Byte Ptr WRK29_Current_Head
Call U1300_Convert_Binary_to_ASCII
Mov AL,AH ;.
Mov AH,Write_TTY_Command ;.
Mov BH,Byte Ptr SYS03_Active_Page
Mov BL,Byte Ptr SYS04_Foreground_Color
Int Video_Interrupt ; ..End
;
Mov AH,Set_CPos_Command ; Set cursor to the next line
Mov BH,Byte Ptr SYS03_Active_Page
Mov DH,Byte Ptr WRK28_Current_Message_Row
Inc DH ; .
Mov DL,Zero ; .
Int Video_Interrupt ; ..End
U1490:
Popf ; Restore the registers
Pop DX ;
Pop BX ; .
Pop AX ; ..End
U1499:
Ret
;
U1400_Display_Head_and_Track Endp
;
Page
;************************************************************************
;* *
;* FLAGS *
;* *
;* This portion of FREECOPY contains the definitions of all of *
;* flags defined in the program. *
;* *
;************************************************************************
;
FLG01_Good_Command DB (?) ; Establishes any errors in the
; . command line entered by a user
FLG02_Double_Side DB (?) ; Points out whether the user wants
; . to copy only the top side of a
; . floppy diskette
FLG03_Default_Drive DB (?) ; Shows if the default drive is a
; . valid floppy disk drive
FLG04_Single_Drive DB (?) ; Determines if the machine is a
; . single drive system
FLG05_Store_Buffer DB (?) ; Establishes whether to put the
; . characters entered from the
; . keyboard into the buffer
FLG06_Yes_or_No DB (?) ; Points out the user's response
; . NO = False YES = True
FLG07_First_Time DB (?) ; Shows the number of times the user
; . copies a diskette
; . ONCE = True MORE = False
FLG08_Good_Read DB (?) ; Flags establish whether the
FLG09_Good_Write DB (?) ; . operation was performed correctly
FLG10_Good_Verify DB (?) ; . YES = True NO = False
FLG11_Good_Format DB (?) ; ..End
FLG12_Good_FAT DB (?) ; Establishes a good FAT when reading
; . source diskette more than once
FLG13_First_Read_Write DB (?) ; Shows if a diskette is being read
; . or written for the first time
; . YES = True NO = False
FLG14_Copy_Complete DB (?) ; Points out if a diskette has been
; . copied completely
; . YES = True NO = False
FLG15_IO_Error DB (?) ; Establishes the type of IO error
; . Zero = Format error
; . One = Read error
; . Two = Write error
; ..End
FLG16_Free_Memory DB (?) ; Determines whether memory should
; . using the PC DOS function calls
FLG17_Copy_More_Disks DB (?) ; Indicates whether to ask a user to
; . write the same disk over again
;
Page
;************************************************************************
;* *
;* MESSAGES *
;* *
;* This portion of FREECOPY contains the definitions of all of *
;* messages defined in the program. *
;* *
;************************************************************************
;
MES00_Copy_Notice Label Byte
DB CR,LF
DB 'FREECOPY Disk Utility',CR,LF
DB 'IBM Personal Computer/Jr.',CR,LF
DB 'Version 1.13 (C)Copyright 1984, 1985',CR,LF
DB CR,LF
DB 'Squire Buresh Assoc., Inc.',CR,LF
DB 'Post Office Box 112',CR,LF
DB 'Millbury, MA 01527',CR,LF
DB CR,LF
DB '$25.00 requested contribution.',CR,LF,EOT
MES01A_Write_Another_Diskette Label Byte
DB CR,LF
DB 'Write source diskette again (Y/N)? ',EOT
MES01B_Copy_Another_diskette Label Byte
DB CR,LF
DB 'Copy another diskette (Y/N)? ',EOT
MES02_Copy_Complete Label Byte
DB CR,LF
DB 'Copy complete.',CR,LF,EOT
MES03_Copy81_Sectors Label Byte
DB CR,LF
DB 'Copying 8 sectors per track, 1 side.',CR,LF,EOT
MES04_Copy82_Sectors Label Byte
DB CR,LF
DB 'Copying 8 sectors per track, 2 sides.',CR,LF,EOT
MES05_Copy91_Sectors Label Byte
DB CR,LF
DB 'Copying 9 sectors per track, 1 side.',CR,LF,EOT
MES06_Copy92_Sectors Label Byte
DB CR,LF
DB 'Copying 9 sectors per track, 2 sides.',CR,LF,EOT
MES07_Correct_And_Press_Key Label Byte
DB CR,LF
DB 'Correct, and press any key to continue',CR,LF,EOT
MES08_Drive_Not_Ready Label Byte
DB CR,LF
DB 'Diskette not in drive :.',CR,LF,EOT
MES09_Insert_Source Label Byte
DB CR,LF
DB 'Insert source diskette in drive :.',CR,LF,EOT
MES10_Insert_Target Label Byte
DB CR,LF
DB 'Insert target diskette in drive :.',CR,LF,EOT
MES11_Insufficient_Memory Label Byte
DB CR,LF
DB 'Insufficient memory.',Bell,CR,LF,EOT
MES12_Invalid_Parameter Label Byte
DB CR,LF
DB 'Invalid parameter(s) specified.',CR,LF,EOT
MES13_Invalid_Default Label Byte
DB CR,LF
DB 'Invalid default floppy disk drive',CR,LF,EOT
MES14_Invalid_Drive Label Byte
DB CR,LF
DB 'Invalid drive specification.',CR,LF,EOT
MES15_Single_Drive_Copy Label Byte
DB CR,LF
DB 'NOTE: Copying diskette on single drive.',Bell,CR,LF,EOT
MES16_Press_Any_Key Label Byte
DB CR,LF
DB 'Press any key when ready.',CR,LF,EOT
MES17_Reading_Track Label Byte
DB 'Reading track ( ) head ( ).',CR,LF,EOT
MES18_Unrecoverable_Format Label Byte
DB CR,LF
DB 'Unrecoverable format error on target.',CR,LF,EOT
MES19_Unrecoverable_Read Label Byte
DB CR,LF
DB 'Unrecoverable read error on source.',CR,LF,EOT
MES20_Unrecoverable_Verify Label Byte
DB CR,LF
DB 'Unrecoverable verify error on target.',CR,LF,EOT
MES21_Unrecoverable_Write Label Byte
DB CR,LF
DB 'Unrecoverable write error on target.',CR,LF,EOT
MES22_Unrecoverable_IO Label Byte
DB CR,LF
DB 'Unrecoverable IO error.',CR,LF,EOT
MES23_Writing_Track Label Byte
DB 'Writing track ( ) head ( ).',CR,LF,EOT
MES24_Yes Label Byte
DB 'YES',CR,LF,EOT
MES25_No Label Byte
DB 'NO',CR,LF,EOT
MES80_Seek_Error Label Byte
DB 'Seek operation has failed.',CR,LF,EOT
MES81_Controller_Error Label Byte
DB 'Disk controller has failed.',CR,LF,EOT
MES82_CRC_Error Label Byte
DB 'Cyclic redundancy check (CRC) error.',CR,LF,EOT
MES83_DMA_Boundary_Error Label Byte
DB 'Attempted to DMA across a 64K boundary.',CR,LF,EOT
MES84_DMA_Error Label Byte
DB 'DMA overrun on I/O operation.',CR,LF,EOT
MES85_Sector_Error Label Byte
DB 'Requested sector not found.',CR,LF,EOT
MES86_Write_Protect_Error Label Byte
DB 'Output diskette is write protected.',CR,LF,EOT
MES87_Address_Mark_Error Label Byte
DB 'Address mark was not found.',CR,LF,EOT
MES88_Command_Error Label Byte
DB 'Bad command passed to the disk interrupt 13H.',CR,LF,EOT
MES89_Unknown_Error Label Byte
DB 'Unknown diskette error encountered.',CR,LF,EOT
MES90_Unknown_FAT_Error Label Byte
DB 'First byte of the FAT does not',CR,LF
DB 'match any known diskette type.',CR,LF,EOT
MES91_Single_Side_Error Label byte
DB 'Double sided diskette in a',CR,LF
DB 'single sided disk drive.',CR,LF,EOT
MES97_Return_Linefeed Label Byte
DB CR,LF,EOT
MES98_Control_Break Label Byte
DB '^C',CR,LF,EOT
MES99_Memory_Block_Destroyed Label Byte
DB 'Memory control block destroyed.',CR,LF,EOT
MES100_Freecopy_Finished Label Byte
DB CR,LF
DB 'Returning to PC DOS.',CR,LF,EOT
;
Page
;************************************************************************
;* *
;* WORK VARIABLES *
;* *
;* This portion of FREECOPY contains the definitions of the work *
;* variables that are used by the program. *
;* *
;************************************************************************
;
WRK01_Source_Drive DB (?) ; Source diskette drive number
WRK02_Target_Drive DB (?) ; Target diskette drive number
WRK03_Valid_Filename DB 11 Dup (32D); Valid diskette file name
WRK04_Parameter_Count DB (?) ; Valid diskette filler area
;
WRK05_Keyboard_Buffer Label Byte
DB 80D ; Length of the keyboard buffer
DB 80 Dup (?); Actual keyboard buffer
DB EOT ; Last char denotes the end of text
;
WRK06_Drive_Number DB (?) ; Drive number of a disk drive
WRK07_Head_Number DB (?) ; Head number of a disk drive
WRK08_Track_Number DB (?) ; Track number of a diskette
WRK09_Sector_Number DB (?) ; Sector number of a diskette
WRK10_Number_of_Sectors DB (?) ; Number of sectors on a track
WRK11_Segment_Address DW (?) ; ES segment address
WRK12_Offset_Address DW (?) ; BX offset address
WRK13_Retry_Counter DB (?) ; Number of retrys to make
WRK14_Status_Operation DB (?) ; Result of the operation
;
WRK15_Maximum_Heads DB (?) ; Maximum heads, tracks and sectors
WRK16_Maximum_Tracks DB (?) ; .
WRK17_Maximum_Sectors DB (?) ; ..End
;
WRK18_Counter_ESBX_Entries DW (?) ; Counter to calculate ES:BX entries
WRK19_Number_ESBX_Entries DW (?) ; Maximum ES:BX table entires
;
Page
;************************************************************************
;* *
;* WORK VARIABLES Page 2 *
;* *
;************************************************************************
;
WRK20_Current_Source_Head DB (?) ; Current source head & track number
WRK21_Current_Source_Track DB (?) ; ..End
WRK22_Current_Target_Head DB (?) ; Current target head & track number
WRK23_Current_Target_Track DB (?) ; . End
;
WRK24_Read_Message_Row DB (?) ; Cursor row of read, verify, format
WRK25_Verify_Message_Row DB (?) ; and write message
WRK26_Format_Message_Row DB (?) ; .
WRK27_Write_Message_Row DB (?) ; .
WRK28_Current_Message_Row DB (?) ; ..End
;
WRK29_Current_Head DB (?) ; Current head and track to display
WRK30_Current_Track DB (?) ; . on the screen
;
WRK31_Track_Read_Counter DB (?) ; Counter of tracks processed
WRK32_Track_Write_Counter DB (?) ; ..End
;
WRK33_CHRN_Table_Address DW (?) ; Current address of the CHRN table
;
WRK34_DMA_Overflow_Counter DW (?) ; Counts how many times FREECOPY
; . adjusted for DMA overflow
;
Page
;************************************************************************
;* *
;* SYSTEM VARIABLES *
;* *
;* This portion of FREECOPY contains the definitions of all of *
;* the system variables used by the program. *
;* *
;************************************************************************
;
SYS01_Number_Columns DB (?) ; Number of columns in current mode
SYS02_Current_Mode DB (?) ; Current video mode
SYS03_Active_Page DB (?) ; Active display page
SYS04_Foreground_Color DB (?) ; Foreground color number
SYS05_Para_RAM_Size DW (?) ; Number of free 16 byte paragraphs
SYS06_Monitor_Flag DB (?) ; 0 = monochrome 1 = graphics
SYS07_No_Parallel_Ports DB (?) ; Number of parallel ports
SYS08_Game_Adapters DB (?) ; Number of RS-232 ports
SYS09_No_RS232_Ports DB (?) ; 0 = no adapter 1 = has adapter
SYS10_No_Disk_Drives DB (?) ; Number of floppy disk drives
SYS11_Init_Video_Mode DB (?) ; Initial video mode when powering
; up the machine
SYS12_Planar_RAM_Size DB (?) ; Planar RAM size
SYS13_IPL_From_Diskette DB (?) ; Location of initial program load
SYS14_Default_Drive DB (?) ; Default disk drive
;
SYS15_Stack_Pointer DW (?) ; Stack pointer value when entering
; . FREECOPY from PC DOS
SYS16_Save_DPT_Offset DW (?) ; Address of Disk Parameter Table
SYS17_Save_DPT_Segment DW (?) ; ..End
;
SYS18_Disk_Parameter_Table Label Byte
DB 11011111B ; SRT = 0D & Head Unload = 0FH
DB 002H ; Head Load = 1 Mode = DMA
DB 025H ; Wait to turn the motor off
DB 002H ; 512 bytes per sector
DB 009H ; 9 sectors per track
DB 02AH ; PC DOS gap length for I/O
DB 0FFH ; Data length parameter
DB 050H ; PC DOS gap length for format
DB 0F6H ; Fille byte for format
DB 00FH ; Head Settle time in milliseconds
DB 002H ; Motor start-up time (1/8 sec.)
;
SYS19_Major_Vers_Number DB (?) ; Major and minor version number
SYS20_Minor_Vers_Number DB (?) ; . of the operating system
;
SYS21_Alloc_Segment DW (?) ; Beginning segment address of
; . free memory
;
Page
;************************************************************************
;* *
;* SETUP STACK POINTER AND MEMORY *
;* *
;* This portion of FREECOPY is contains the stack and the label *
;* that indicates the beginning of available memory. *
;* *
;************************************************************************
;
MEM05_Bottom_of_the_Stack Label Word
DW 64 Dup (?)
MEM04_Top_of_the_Stack Label Word
;
MEM03_ESBX_Table Equ MEM04_Top_of_the_Stack+2
;
MEM02_CHRN_Table Equ MEM03_ESBX_Table+320
;
MEM01_File_Allocation_Table Equ MEM02_CHRN_Table+2880
;
MEM00_Bottom_Free_Memory Equ MEM01_File_Allocation_Table+512
;
Page
;************************************************************************
;* *
;* END OF THE PROGRAM *
;* *
;************************************************************************
;
CSEG Ends
End A1000_Main_Module
FREECOPY.DOC
THIS IS THE BEGINNING OF THE DOCUMENT
****** FREECOPY Users Guide ***** Page 1.
---------------------------------------------------
F R E E C O P Y
A Disk Utility for the IBM Personal Computer
Users Guide by Donald L. Buresh, C.D.P.
Version 1.10
(C)Copyright 1984, 85 Squire Buresh Associates, Inc.
$25.00 Requested Contribution
---------------------------------------------------
Squire Buresh Associates, Inc. P.O. Box 112 Millbury, MA 01527
****** FREECOPY Users Guide ***** Page 2.
TABLE OF CONTENTS
Page
I. To the Users of FREECOPY 3
II. Running FREECOPY 5
III. Notes on FREECOPY
a. The Parameters 6
b. Fragmented Data 7
c. Disk Errors 8
IV. Messages from FREECOPY
a. Informative Messages 10
b. Error Messages 13
V. Remarks on User Supported Software 17
VI. Acknowledgements 19
Squire Buresh Associates, Inc. P.O. Box 112 Millbury, MA 01527
****** FREECOPY Users Guide ***** Page 3.
I. To the Users Of FREECOPY
This is a short summary describing what is on the FREECOPY
diskette. FREECOPY is a disk utility that is functionally
equivalent to DISKCOPY which is distributed with IBM PC DOS.
I am releasing this software into the public domain because I
believe that the time has come for users to see and criticize
professional quality source code. I welcome all comments on
FREECOPY, particularly about any bugs you discover in the code.
In developing FREECOPY, I reversed engineered DISKCOPY and made
sure that I did not violate the proprietary rights of either IBM or
Microsoft. In fact, I took great pains to ensure that FREECOPY
is better than DISKCOPY.
The three (3) files that are on this diskette are:
o FREECOPY.COM - The executable code
o FREECOPY.ASM - The source code
o FREECOPY.DOC - A users guide
The executable code is a binary .COM file that comes in machine
readable format. The source code is structured assembly language
with lots of comments. This users guide is a short document
describing how to run FREECOPY.
Squire Buresh Associates, Inc. P.O. Box 112 Millbury, MA 01527
****** FREECOPY Users Guide ***** Page 4.
FREECOPY is the first of a series of assembly language programs
that I am distributing on a user supported basis. I will create
significant programs for the PC community. These programs will
appear in conjunction with the articles that I am writing for the
disk-based magazine PC FIRING LINE edited by Bill Salkin. I am
writing the PC DOS/ROM column.
If you find FREECOPY helpful, please give the package to other
users without alteration so that I can answer people's questions.
I am requesting a $25.00 contribution. If you want a copy, send a
self-addressed postage-paid mailer along with a formatted diskette
to us. No exceptions, please.
Regardless of the contribution, users are encouraged to copy and
share the program with other users.
- Donald L. Buresh, C.D.P. -
Squire Buresh Associates, Inc. P.O. Box 112 Millbury, MA 01527
****** FREECOPY Users Guide ***** Page 5.
II. Running FREECOPY
FREECOPY copies the source diskette on a track by track basis
to the target diskette formatting and then writing to the target
diskette. The utility does not check the drive letter to see
if you specified a hard disk drive.
Before invoking FREECOPY, examine the PC DOS prompt (e.g.,
A> for drive A:) that denotes the default drive. To execute
FREECOPY, enter the command:
FREECOPY X: Y:/1
where the first parameter X: specifies the source drive, the second
parameter Y: indicates the target drive and the /1 parameter
instructs the utility to copy only the top side of the source
diskette.
The disk drives X: and Y: may or may not be the same. If they
are equal to each other or omitted altogether, FREECOPY copies the
source diskette using a single drive. The program prompts you to
insert the appropriate diskette at the correct time.
When FREECOPY finishes copying a diskette, the program asks
you if you want to continue. If you press Y(es), FREECOPY starts
the process all over again with the same parameters that you
specified when invoking the program. If you press N(o), FREECOPY
returns to PC DOS. The program ignores all other answers except
Control-C or Control-Break which also transfers control to PC DOS.
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III. Notes on FREECOPY
These notes on FREECOPY demonstrate to the user the features
and/or limitations of the program.
a. The Parameters
If you do not specify both disk drive parameters, FREECOPY
copies the source diskette using only the PC DOS default drive.
For exammple, if the PC default drive is B:, and you invoke
FREECOPY with the command:
B>FREECOPY
the program copies the source diskette onto the target diskette
using only drive B:.
If you specify only one disk drive parameter, FREECOPY assumes
that it is the source drive and that the target drive is the PC DOS
default drive. For example, if A: is the PC DOS default drive and
you enter the command:
A>FREECOPY B:
the program assumes that the source drive is B: and the target drive
is A:. If the default drive is the same as the drive that you
indicated when you entered the command, FREECOPY copies the source
diskette using a single drive. This command might look like:
B>FREECOPY B:
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If you enter distinct source and target disk drivers, FREECOPY
will follow your command exactly. For example, if A: is the PC DOS
default drive and you enter:
A>FREECOPY A: B:
the program copies the the source diskette in drive A: to the target
diskette in drive B:. However, if you have only one disk drive on
your system, FREECOPY is smart enough to use one drive.
If you employ the /1 parameter when invoking FREECOPY, the program
copies the top side of the source diskette. If the source drive is
single sided, FREECOPY recognizes that this parameter is not
necessary.
b. Fragmented Data
While using a diskette, the sectors that contain your data may
not be in sequential order. This situation occurs because PC DOS
uses the first available sector when writing files regardless of its
position on the diskette.
A diskette with fragmented files degrades the performance of
PC DOS causing excessive head movement when reading and/or writing
a file. If so, you may want to use the COPY command to copy the
files from the source diskette to the target diskette.
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c. Disk Errors
There are many reasons for a diskette error. The two (2) most
common reasons are:
o The mylar for a given track wears out; or
o The contents of the diskette are copy protected
by the software manufacturer.
All things have a finite lifespan, including diskettes. When the
mylar of a track can no longer retain the data, FREECOPY can do very
little to recover the information. We recommend that you always
maintain a backup diskette of your important data.
It is unfortunate that some software manufacturers make it
difficult, if not impossible, to copy their programs. It is our
opinion that copy protection assumes that everyone will attempt to
violate the software manufacturer's rights. One of the fundamental
principles of FREEWARE is that the user has the right to
examine the quality of the source code before deciding whether
or not they want to purchase it. FREECOPY is consistent with the
FREEWARE concept and it does not currently break any copy protection
schemes.
FREECOPY always displays the head and track number that it is
currently processing. If the program encounters a disk error,
it displays the appropriate message on the screen. Section IV of
this manual describes the messages in great detail.
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If FREECOPY encounters a disk error for either the source or
target diskette, that diskette may or may not be usable, depending
on whether the affected track contains valid data.
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IV. Messages from FREECOPY
The messages that FREECOPY displays on the screen come in two
varieties: informative messages and error messages.
a. Informative Messages
Copy another diskette (Y/N)?
If you want to copy another diskette, enter Y(y) and FREECOPY
prompts you to insert a diskette in the source drive. If you
reply N(n), the program returns control to PC DOS. FREECOPY
ignores any other answer except Control-C, Control-Break and
Control-Alt-Del.
Copy is complete.
FREECOPY has successfully copied the contents of the source
diskette onto the target diskette.
Copying X sectors per track, Y side.
This message tells you that a source diskette is a PC DOS 1.0,
1.1 or 2.0 diskette, single or double sided.
Correct, and press any key to continue.
This message appears when FREECOPY is unable to validate a
source diskette for one or more of the following reasons:
o The diskette is unformatted;
o The first byte of the File Allocation Table (FAT)
is invalid;
o A double sided diskette is placed in a single
sided source drive and the user did not ask
FREECOPY to copy only the first side.
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A diskette is not in drive X:.
FREECOPY displays this message on the screen when there is
no diskette in either the source or target drive.
Insert source diskette in drive X:.
This message tells you when to insert the source diskette
into the source drive.
Insert target diskette in drive Y:.
This message appears on the screen when FREECOPY is ready to
copy the source diskette onto the target diskette.
Insufficient memory.
FREECOPY puts this message on the screen when there is not
enough free memory on the machine to contain:
o A complete copy of COMMAND.COM, including the
resident portion in low memory and the transient
portion in high memory (PC DOS 1.0 and 1.1 only);
o A copy of the ES:BX table that holds the beginning
addresses of each track stored in memory;
o A copy of the CHRN table that is used when the
target diskette is unformatted;
o A copy of the File Allocation Table (FAT) of the
source diskette;
o At least one (1) track of the source diskette.
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Invalid parameter(s) specified.
FREECOPY issues this message when a colon did follow a drive
letter, a file name appears after a drive letter and a colon,
or a /1 occurs in the wrong position.
Invalid default floppy disk drive.
The program issues this message when the PC DOS default drive
is invalid. It can occur when a system has more than four (4)
logical disk drives that reside on a hard disk.
Note: Copying diskette on a single drive.
FREECOPY displays this message and sounds the bell to inform
you that it is using one (1) drive to copy the source diskette.
Press any key when ready.
This message is self-explanatory. Press any key except
Control-C or Control-Break to continue the processing.
Reading track (XX) head (Y).
The program issues this message when it is reading the source
diskette.
Returning to PC DOS.
FREECOPY puts this message on the screen whenever it transfers
control back to PC DOS.
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Write source diskette again (Y/N)?
This message asks a user if he/she wants another copy of the
source diskette. It appears only when the computer can
store the source diskette completely in memory.
Writing track (XX) head (Y).
This message tells you the track and head that FREECOPY is
writing onto the target diskette.
b. Error Messages
Address mark was not found.
When this message appears, INT 13H was not able to find the
CHRN entry that is standard for PC DOS diskettes. The diskette
is probably copy-protected by the manufacturer.
Bad command passed to the disk interrupt 13H.
This is a diagnostic message that was used in debugging
FREECOPY.
Cyclic redundancy check (CRC) error.
FREECOPY displays this message on the screen when the 16 bit
CRC character is invalid. This word immediately follows the
CHRN entry on a diskette and is generated by the polynomial:
16 12 5
P(X) = X + X + X + 1
where X is any byte of a given sector except the CRC or ID
byte.
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Disk controller has failed.
The program issues this message when the disk controller chip
is no longer working. This chip can be the Intel 8272 or
the NEC 765. They are functionally equivalent.
DMA overrun on an I/O operation.
This is a diagnostic message used in debugging FREECOPY. It
means that the disk controller chip (i8272 or NEC 765) tried
to use more memory than what was allocated to it by FREECOPY.
Double sided diskette in a
single sided disk drive.
This message appears when you place a double sided diskette in
a single sided drive and you did not tell FREECOPY to copy only
the top side of the diskette.
First byte of the FAT does not
match any known diskette type.
FREECOPY checks the first byte of the File Allocation Table
(FAT) for validity. If it is not equal to 0FCH, 0FDH, 0FEH
or 0FFH, the program displays this message.
Memory control block destroyed.
This was used in implementing and testing the PC DOS memory
allocation function calls. It should not appear when
normally using FRECOPY.
Requested sector not found.
This message occurs when the sectors of a given track for
the source diskette are not in sequential order, starting at
one (1) and ending at eight (8) or nine (9). The source
diskette is probably copy-protected by the manufacturer.
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Seek operation has failed.
This message appears when FREECOPY attempts to read or write
physical tracks greater than number forty-one (41) or seeks
a valid physical track number with an invalid logical track
number. If the first case is true, FREECOPY contains a
bug. This should not be the case. Probably a valid physical
track is holding an invalid logical track number in the CHRN
table. If so, the source diskette is copy-protected by the
manufacturer.
Target diskette is write protected.
If this message appears, remove the write protection tab on the
target diskette.
Tried DMA across a 64K boundary.
Since the Intel 8088 processor chip breaks up memory into
64K segments, this message appears when FREECOPY tries to
write a track of the source diskette into memory across a
64K boundary. This is a diagnostic message that was used
to debug FREECOPY.
Unrecoverable format error on target.
FREECOPY puts this message on the screen when it is unable
to format the target diskette. You should use another
target diskette.
Unrecoverable I/O error.
This message appears when an error occurs and FREECOPY is
unable to determine the nature of the error.
Unrecoverable read error on source.
The program displays this message when it cannot read the
source diskette. FREECOPY tries four (4) times before this
statement appears on the screen.
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Unrecoverable write error on target.
This message indicates that FREECOPY could not write the
data on the source diskette onto the target diskette. You
should use another target diskette.
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****** FREECOPY Users Guide ***** Page 17.
V. Remarks on User Supported Software
According to Andrew Fluegelman, user supported software is based
on the following three (3) principles:
o The utility of software can only be ascertained by a
user on their own system;
o The development of personal computer software should
be encouraged by the computing community; and
o The duplication of software should be encouraged rather
than restricted by copy-protection schemes.
The basic assumption behind these principles is that software
developers will rely on the individuals in the computing community
to support them financially. However, most developers are committed
to selling their wares through standard market channels.
The market for personal computing software is growing without
bound. Advertising and documentation costs are now a significant
barrier to the would be entrepreneur. The shelf space of major
distributors is commanding premium dollars. This means that within
a short period of time, we may see very few new programs on the
market. The small software developer will be driven from the
marketplace.
On the other hand, a computer program is a mechanism to process
data and form information. Information is a commodity that is
neither non-renewable nor recycleable. It is expandable. If I
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have information and give or sell it to you, we both have it.
The net effect of the transaction is positive. The net effect
of all other transactions in human history has been zero. If you
and I trade two goods, I lose what I have to gain what you have and
vice versa.
The FREEWARE concept admits that the exchange of software is an
informational transaction where both parties gain and yet retain what
they had before the transaction. Software developers who are selling
through standard market channels are attempting to make an
informational transaction into an exchange transaction with a zero
net effect. This is impossible in the long run.
I am writing user supported software because I believe that it
is a viable alternative to selling my wares through the standard
market channels. I believe that user supported software will
supply the computing community with significant computer programs
as soon as professional developers recognize that they can thrive
by selling their programs in this fashion.
Therefore, I am pleased to offer FREECOPY to the computing
community and I welcome other authors to try their hand at creating
professional quality software.
- Donald L. Buresh, C.D.P. -
Squire Buresh Associates, Inc. P.O. Box 112 Millbury, MA 01527
****** FREECOPY Users Guide ***** Page 19.
VI. Acknowledgements
This is where I thank the people who made FREECOPY possible.
My first round of thanks go out to Andrew Fluegelman for inventing
the FREEWARE concept. I would like to thank Marshall Goldberg for
convincing me that the computing community needs public domain
software. I want to thank Patricia Smith and Jim Button for
demonstrating to me that an individual can thrive on user supported
software provided that they have the right product. My thanks
go out to Bill Salkin for creating PC Firing Line and for the
many hours of conversation about the magazine.
From a technical perspective, I want to thank Brian Markey
for indicating how to overcome DMA boundary errors and Harry Keller
for demonstrating how to calculate the amount of available free
memory. I also think that Keith Beal deserves credit for showing
me a documentation system for assembly language programs.
The trademarks that I have mentioned in this users guide are
listed below.
o IBM and PC DOS are registered trademarks of International
Business Machines, Inc.
o FREEWARE is a trademark of The Headlands Press, Inc.
o PC Firing Line is a trademark of ABComputing
- Donald L. Buresh, C.D.P. -
Squire Buresh Associates, Inc. P.O. Box 112 Millbury, MA 01527
****** FREECOPY Users Guide ***** Page 20.
VII. List of Bugs
Since the first release of FREECOPY, I have corrected a
number of bugs. Some were small and some were not.
o Ensured that FREECOPY runs on PC with lots of
memory.
o Flushed the standard keyboard buffer to prevent
a user from unwantly typing ahead.
o Modified the command line parser to process the
TAB character.
o Completely revampled the memory management scheme
so that FREECOPY uses the PC DOS function calls
when running versions of the operating system
greater than 2.0
Squire Buresh Associates, Inc. P.O. Box 112 Millbury, MA 01527
THIS IS THE END OF THE DOCUMENT
Directory of PC-SIG Library Disk #0226
Volume in drive A has no label
Directory of A:\
FILES226 TXT 497 7-02-85 2:28p
FREECOPY ASM 93952 6-06-85 7:38p
FREECOPY COM 5294 6-06-85 7:39p
FREECOPY DOC 28800 6-06-85 7:51p
FREECOPY LST 196547 6-06-85 7:39p
FREECOPY MAP 190 6-06-85 7:39p
FREECOPY REF 30773 6-06-85 7:40p
7 file(s) 356053 bytes
2048 bytes free