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https://github.com/bobbimanners/Applecorn.git
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Started work on OSFIND, OSBGET/OSBPUT. W-I-P.
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Bobbi Webber-Manners
parent
d68dbd19bf
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BIN
applecorn.po
BIN
applecorn.po
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214
applecorn.s
214
applecorn.s
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@ -281,6 +281,79 @@ COPYAUXBLK
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LDA $C081
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RTS
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* ProDOS file handling for MOS OSFIND OPEN call
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OFILE LDX $0100 ; Recover SP
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TXS
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LDA $C081 ; ROM, please
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LDA $C081
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LDA #<MOSFILE
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STA OPENPL+1
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LDA #>MOSFILE
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STA OPENPL+2
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JSR OPENFILE
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BCS :NOTFND
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LDA OPENPL+5 ; File ref number
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PHA
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BRA FINDEXIT
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:NOTFND LDA #$00
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PHA
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FINDEXIT LDA $C08B ; R/W RAM, LC bank 1
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LDA $C08B
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LDA #<OSFINDRET
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STA STRTL
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LDA #>OSFINDRET
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STA STRTH
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PLA
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SEC
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BIT $FF58
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JMP XFER
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* ProDOS file handling for MOS OSFIND CLOSE call
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CFILE LDX $0100 ; Recover SP
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TXS
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LDA $C081 ; ROM, please
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LDA $C081
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LDA MOSFILE ; File ref number
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STA CLSPL+1
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JSR CLSFILE
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JMP FINDEXIT
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* ProDOS file handling for MOS OSBGET call
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FILEGET LDX $0100 ; Recover SP
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TXS
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LDA $C081 ; ROM, please
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LDA $C081
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LDA MOSFILE ; File ref number
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STA READPL1+1
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JSR MLI
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DB READCMD
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DW READPL1
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PHA
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* TODO HANDLE ERROR CASE WHERE C IS SET
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GETEXIT LDA $C08B ; R/W RAM, LC bank 1
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LDA $C08B
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LDA #<OSBGETRET
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STA STRTL
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LDA #>OSBGETRET
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STA STRTH
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PLA
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SEC
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BIT $FF58
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JMP XFER
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* ProDOS file handling for MOS OSBPUT call
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FILEPUT LDX $0100 ; Recover SP
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TXS
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LDA $C081 ; ROM, please
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LDA $C081
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JMP GETEXIT
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* ProDOS file handling for MOS OSFILE LOAD call
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* Return A=0 if successful
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* A=1 if file not found
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@ -650,6 +723,12 @@ READPL HEX 04 ; Number of parameters
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DW 512 ; Request count
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DW $0000 ; Trans count
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READPL1 HEX 04 ; Number of parameters
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DB #00 ; Reference number
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DW RDBUF ; Pointer to data buffer
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DW 1 ; Request count
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DW $0000 ; Trans count
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WRITEPL HEX 04 ; Number of parameters
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DB $01 ; Reference number
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DW RDBUF ; Pointer to data buffer
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@ -1000,13 +1079,78 @@ OSREAD LDA #<OSREADM
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OSREADM ASC 'OSREAD.'
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DB $00
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OSFIND LDA #<OSFINDM
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LDY #>OSFINDM
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JSR PRSTR
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RTS
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OSFINDM ASC 'OSFIND.'
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DB $00
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* OSFIND - open/close a file for byte access
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OSFIND PHX
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PHY
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PHA
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STX ZP1 ; Points to filename
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STY ZP1+1
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LDA STRTL ; Backup STRTL/STRTH
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STA TEMP1
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LDA STRTH
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STA TEMP2
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TSX ; Stash alt ZP
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STX $0101
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PLA
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PHA
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CMP #$00 ; A=$00 = close
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BEQ :CLOSE
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LDA #<MOSFILE+1
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STA ZP2
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LDA #>MOSFILE+1
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STA ZP2+1
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LDY #$00
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:L1 LDA (ZP1),Y
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STA $C004 ; Write main
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STA (ZP2),Y
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STA $C005 ; Write aux
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INY
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CMP #$0D ; Carriage return
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BNE :L1
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DEY
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STA $C004 ; Write main
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STY MOSFILE ; Length (Pascal string)
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STA $C005 ; Write aux
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LDA #<OFILE
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STA STRTL
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LDA #>OFILE
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STA STRTH
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:S1 CLC ; Use main memory
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CLV ; Use main ZP and LC
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JMP XFER
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:CLOSE STA $C004 ; Write main
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STY MOSFILE ; Write file number
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STA $C005 ; Write aux
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LDA #<CFILE
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STA STRTL
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LDA #>CFILE
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STA STRTH
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BRA :S1
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OSFINDRET
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LDX $0101 ; Recover alt SP from $0101
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TXS
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PHA ; Return value
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LDA TEMP1 ; Restore STRTL/STRTH
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STA STRTL
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LDA TEMP2
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STA STRTH
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PLA ; Return value
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PLY ; Value of A on entry
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CPY #$00 ; Was it close?
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BNE :S1
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TYA ; Preserve A for close
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:S1 PLY
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PLX
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RTS
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* OSFSC - miscellanous file system calls
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OSFSC LDA #<OSFSCM
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LDY #>OSFSCM
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JSR PRSTR
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@ -1014,6 +1158,7 @@ OSFSC LDA #<OSFSCM
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OSFSCM ASC 'OSFSC.'
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DB $00
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* OSGBPB - Get/Put a block of bytes to/from an open file
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OSGBPB LDA #<OSGBPBM
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LDY #>OSGBPBM
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JSR PRSTR
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@ -1021,20 +1166,50 @@ OSGBPB LDA #<OSGBPBM
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OSGBPBM ASC 'OSGBPB.'
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DB $00
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OSBPUT LDA #<OSBPUTM
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LDY #>OSBPUTM
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JSR PRSTR
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RTS
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OSBPUTM ASC 'OSBPUT.'
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DB $00
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* OSBPUT - write one byte to an open file
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OSBPUT LDA STRTL ; Backup STRTL/STRTH
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STA TEMP1
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LDA STRTH
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STA TEMP2
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LDA #<FILEPUT
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STA STRTL
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LDA #>FILEPUT
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STA STRTH
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TSX ; Stash alt SP in $0101
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STX $0101
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CLC ; Use main memory
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CLV ; Use main ZP and LC
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JMP XFER
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OSBGET LDA #<OSBGETM
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LDY #>OSBGETM
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JSR PRSTR
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* OSBGET - read one byte from an open file
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OSBGET LDA STRTL ; Backup STRTL/STRTH
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STA TEMP1
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LDA STRTH
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STA TEMP2
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STA $C004 ; Write to main memory
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STY MOSFILE ; File ref number
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STA $C005 ; Write to aux memory
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LDA #<FILEGET
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STA STRTL
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LDA #>FILEGET
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STA STRTH
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TSX ; Stash alt SP in $0101
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STX $0101
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CLC ; Use main memory
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CLV ; Use main ZP and LC
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JMP XFER
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OSBGETRET
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LDX $0101 ; Recover alt SP from $0101
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TXS
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PHA ; Return code
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LDA TEMP1 ; Recover STRTL/STRTH
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STA STRTL
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LDA TEMP2
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STA STRTH
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PLA ; Return code (ie: char read)
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RTS
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OSBGETM ASC 'OSBGET.'
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DB $00
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* OSARGS - adjust file arguments
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OSARGS LDA #<OSARGSM
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LDY #>OSARGSM
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JSR PRSTR
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@ -1042,6 +1217,7 @@ OSARGS LDA #<OSARGSM
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OSARGSM ASC 'OSARGS.'
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DB $00
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* OSFILE - load or save an entire file
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OSFILE PHX
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PHY
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PHA
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@ -1301,6 +1477,7 @@ CURSRT LDA COL
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STZ COL
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:S2 RTS
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* OSWRCH - write a character to the console
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OSWRCH PHA
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PHX
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PHY
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@ -1413,6 +1590,7 @@ SCNTAB DW $800,$880,$900,$980,$A00,$A80,$B00,$B80
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DW $828,$8A8,$928,$9A8,$A28,$AA8,$B28,$BA8
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DW $850,$8D0,$950,$9D0,$A50,$AD0,$B50,$BD0
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* OSWORD - system calls that take word argument in X,Y
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OSWORD STX ZP1 ; ZP1 points to control block
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STY ZP1+1
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CMP #$00 ; OSWORD 0 read a line
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@ -1524,6 +1702,7 @@ OSWORD6 LDY #$04
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STA (ZP1)
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RTS
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* OSBYTE - system calls that take a byte in A
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OSBYTE PHX
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PHY
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:S02 CMP #$02 ; $02 = select i/p stream
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@ -1654,6 +1833,7 @@ OSBYTEM ASC 'OSBYTE($'
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OSBM2 ASC ').'
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DB $00
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* OSCLI - interface to command line
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OSCLI PHX
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PHY
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STX ZP1 ; Pointer to CLI
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