139 lines
3.5 KiB
ArmAsm
139 lines
3.5 KiB
ArmAsm
SBTL 'Z A P -- DISK UPDATE UTILITY'
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ORG $900
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SKP 1
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***********************************************************
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* *
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* ZAP: THIS PROGRAM WILL ALLOW ITS USER TO READ/WRITE *
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* INDIVIDUAL SECTORS FROM/TO THE DISKETTE *
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* *
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* INPUT: $02 = TRACK TO BE READ *
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* $03 = SECTOR TO BE READ/WRITTEN *
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* $04 = $01 - READ SECTOR *
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* $02 - WRITE SECTOR *
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* $800 = ADDRESS OF SECTOR DATA BUFFER *
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* *
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* ENTRY POINT: $900 *
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* *
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* PROGRAMMER: DON D WORTH 2/15/81 *
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* *
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***********************************************************
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SKP 2
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BELL EQU $87 BELL CHARACTER
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SKP 1
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* ZPAGE DEFINITIONS
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SKP 1
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PTR EQU $0 WORK POINTER
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TRACK EQU $2 TRACK TO BE READ/WRITTEN
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SECTOR EQU $3 SECTOR TO BE READ/WRITTEN
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OPER EQU $4 OPERATION TO BE PERFORMED
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READ EQU 1 READ OPERATION
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WRITE EQU 2 WRITE OPERATION
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A1L EQU $3C MONITOR POINTER
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A2L EQU $3E MONITOR POINTER
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PREG EQU $48 MONITOR STATUS REGISTER
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SKP 1
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* OTHER ADDRESSES
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SKP 1
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BUFFER EQU $800 SECTOR DATA BUFFER
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LOCRPL EQU $3E3 LOCATE RWTS PARMLIST SUBRTN
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RWTS EQU $3D9 RWTS SUBROUTINE
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COUT EQU $FDED PRINT ONE CHAR SUBROUTINE
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PRBYTE EQU $FDDA PRINT ONE HEX BYTE SUBRTN
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XAM EQU $FDB3 MONITOR HEX DUMP SUBRTN
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SKP 1
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* RWTS PARMLIST DEFINITION
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SKP 1
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DSECT
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RPLIOB DS 1 IOB TYPE ($01)
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RPLSLT DS 1 SLOT*16
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RPLDRV DS 1 DRIVE
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RPLVOL DS 1 VOLUME
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RPLTRK DS 1 TRACK
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RPLSEC DS 1 SECTOR
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RPLDCT DS 2 ADDRESS OF DCT
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RPLBUF DS 2 ADDRESS OF BUFFER
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RPLSIZ DS 2 SECTOR SIZE
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RPLCMD DS 1 COMMAND CODE
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RPLCNL EQU $00 NULL COMMAND
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RPLCRD EQU $01 READ COMMAND
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RPLCWR EQU $02 WRITE COMMAND
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RPLCFM EQU $04 FORMAT COMMAND
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RPLRCD DS 1 RETURN CODE
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RPLRWP EQU $10 WRITE PROTECTED
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RPLRVM EQU $20 VOLUME MISMATCH
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RPLRDE EQU $40 DRIVE ERROR
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RPLRRE EQU $80 READ ERROR
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RPLTVL DS 1 TRUE VOLUME
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RPLPSL DS 1 PREVIOUS SLOT
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RPLPDR DS 1 PREVIOUS DRIVE
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DEND
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SKP 2
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* FILL IN RWTS LIST
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SKP 1
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ZAP JSR LOCRPL LOCATE RWTS PARMLIST
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STY PTR AND SAVE POINTER
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STA PTR+1
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SKP 1
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LDA TRACK GET TRACK TO READ/WRITE
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LDY #RPLTRK STORE IN RWTS LIST
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STA (PTR),Y
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SKP 1
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LDA SECTOR GET SECTOR TO READ/WRITE
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CMP #16 BIGGER THAN 16 SECTORS?
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BCC SOK NO
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LDA #0
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STA SECTOR YES, PUT IT BACK TO ZERO
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SOK LDY #RPLSEC
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STA (PTR),Y STORE IN RWTS LIST
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SKP 1
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LDY #RPLBUF
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LDA #>BUFFER STORE BUFFER PTR IN LIST
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STA (PTR),Y
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INY
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LDA #<BUFFER
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STA (PTR),Y
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SKP 1
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LDA OPER GET COMMAND CODE
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LDY #RPLCMD AND STORE IN LIST
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STA (PTR),Y
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SKP 1
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LDA #0 ANY VOLUME WILL DO
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LDY #RPLVOL
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STA (PTR),Y
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SKP 1
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* NOW CALL RWTS TO READ/WRITE THE SECTOR
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SKP 1
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JSR LOCRPL RELOAD POINTER TO PARMS
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JSR RWTS CALL RWTS
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LDA #0
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STA PREG FIX P REG SO DOS IS HAPPY
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BCC EXIT ALL IS WELL
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PAGE
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* ERROR OCCURED, PRINT "RC=XX"
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SKP 1
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LDA #BELL BEEP THE SPEAKER
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JSR COUT
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LDA #'R PRINT THE "RC="
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JSR COUT
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LDA #'C
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JSR COUT
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LDA #'=
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JSR COUT
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LDY #RPLRCD
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LDA (PTR),Y GET RWTS RETURN CODE
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JSR PRBYTE PRINT RETURN CODE IN HEX
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SKP 1
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* WHEN FINISHED, DUMP SOME OF SECTOR IN HEX
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SKP 1
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EXIT LDA #>BUFFER DUMP 800.8B7
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STA A1L
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LDA #<BUFFER
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STA A1L+1
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LDA #>BUFFER+$AF
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STA A2L
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LDA #<BUFFER+$AF
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STA A2L+1
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JMP XAM EXIT VIA HEX DISPLAY
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\x00\x00
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JMP XAM EXIT VIA HEX DISPLAY
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