Added *CAT function. Fixed LOADFILE bug.
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Bobbi Webber-Manners
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applecorn.po
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applecorn.po
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232
applecorn.s
232
applecorn.s
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@ -177,20 +177,20 @@ SETPRFX LDA GPFXCMD
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:L1 JSR MLI
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:OPC7 DB $00
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DW GPFXPL
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LDX $0300
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LDX RDBUF
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BNE :S1
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LDA $BF30
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STA ONLPL+1 ; Device number
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JSR MLI
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DB ONLNCMD
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DW ONLPL
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LDA $0301
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LDA RDBUF+1
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AND #$0F
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TAX
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INX
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STX $0300
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STX RDBUF
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LDA #$2F
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STA $0301
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STA RDBUF+1
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DEC :OPC7
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BNE :L1
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:S1 RTS
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@ -244,9 +244,9 @@ LOADFILE LDX $0100 ; Recover SP
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LDA #>RDBUFEND
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STA A2H
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LDA FBEXEC
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LDA FBLOAD
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STA A4L
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LDA FBEXEC+1
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LDA FBLOAD+1
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LDX BLOCKS
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:L2 CPX #$00
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BEQ :S2
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@ -270,8 +270,8 @@ LOADFILE LDX $0100 ; Recover SP
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BRA :EOF2
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:EOF LDA #$00 ; Success
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PHA
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:EOF2 LDA OPENPL+1 ; File ref num
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STA CLSPL+5
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:EOF2 LDA OPENPL+5 ; File ref num
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STA CLSPL+1
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JSR CLSFILE
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:EXIT LDA $C08B ; R/W RAM, bank 1
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LDA $C08B
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@ -405,14 +405,14 @@ SAVEFILE LDX $0100 ; Recover SP
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LDA #$01 ; Can't open/create
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BRA :EXIT
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:WRITEERR
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LDA OPENPL+1 ; File ref num
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STA CLSPL+5
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LDA OPENPL+5 ; File ref num
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STA CLSPL+1
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JSR CLSFILE
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LDA #$02 ; Write error
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BRA :EXIT
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:NORMALEND
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LDA OPENPL+1 ; File ref num
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STA CLSPL+5
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LDA OPENPL+5 ; File ref num
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STA CLSPL+1
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JSR CLSFILE
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LDA #$00 ; Success!
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BCC :EXIT ; If close OK
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@ -438,6 +438,85 @@ QUIT INC $3F4 ; Invalidate powerup byte
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DW QUITPL
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RTS
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* Obtain catalog of current PREFIX dir
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CATALOG LDX $0100 ; Recover SP
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TXS
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LDA $C081 ; Select ROM
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LDA $C081
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JSR MLI ; Fetch prefix into RDBUF
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DB GPFXCMD
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DW GPFXPL
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BNE CATEXIT ; If prefix not set
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LDA #<RDBUF
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STA OPENPL+1
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LDA #>RDBUF
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STA OPENPL+2
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JSR OPENFILE
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BCS CATEXIT ; Can't open dir
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CATREENTRY
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LDA OPENPL+5 ; File ref num
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STA READPL+1
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JSR RDBLK
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BCC :S1
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CMP #$4C ; EOF
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BEQ :EOF
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BRA :READERR
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:S1 LDA #<RDBUF
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STA A1L
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LDA #>RDBUF
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STA A1H
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LDA #<RDBUFEND
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STA A2L
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LDA #>RDBUFEND
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STA A2H
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LDA #<AUXBLK
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STA A4L
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LDA #>AUXBLK
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STA A4H
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SEC ; Main -> AUX
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JSR AUXMOVE
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LDA $C08B ; R/W RAM, bank 1
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LDA $C08B
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LDA #<PRONEBLK
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STA STRTL
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LDA #>PRONEBLK
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STA STRTH
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SEC
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BIT $FF58
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JMP XFER
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:READERR
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:EOF LDA OPENPL+5 ; File ref num
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STA CLSPL+1
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JSR CLSFILE
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CATEXIT LDA $C08B ; R/W LC RAM, bank 1
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LDA $C08B
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LDA #<STARCATRET
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STA STRTL
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LDA #>STARCATRET
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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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* PRONEBLK call returns here ...
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CATALOGRET
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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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BRA CATREENTRY
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* Create disk file
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CRTFILE JSR MLI
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DB CREATCMD
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@ -506,10 +585,10 @@ CLSPL HEX 01 ; Number of parameters
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ONLPL HEX 02 ; Number of parameters
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DB $00 ; Unit num
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DW $301 ; Buffer
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DW RDBUF+1 ; Buffer
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GPFXPL HEX 01 ; Number of parameters
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DW $300 ; Buffer
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DW RDBUF ; Buffer
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QUITPL HEX 04 ; Number of parameters
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DB $00
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@ -532,14 +611,22 @@ FBSTRT DW $0000 ; Start address for SAVE
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FBEND DW $0000 ; End address for SAVE
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DW $0000
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*********************************************************
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* Disk block buffer
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AUXBLK DS $200 ; 512 bytes
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**********************************************************
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* Everything below here is the BBC Micro 'virtual machine'
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* in Apple //e Auxiliary memory
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**********************************************************
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ZP1 EQU $90 ; $90-$9f are Econet space
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; so safe to use
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ZP2 EQU $92
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ROW EQU $94 ; Cursor row
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COL EQU $95 ; Cursor column
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ZP3 EQU $94
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ROW EQU $96 ; Cursor row
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COL EQU $97 ; Cursor column
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WARMSTRT EQU $9F ; Cold or warm start
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FAULT EQU $FD ; Error message pointer
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ESCFLAG EQU $FF ; Escape status
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@ -1388,15 +1475,23 @@ OSCLI PHX
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STA ZP2+1
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JSR STRCMP
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BCS :S2
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JSR CATALOG
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JSR STARCAT
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BRA :EXIT
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:S2 LDA #<:CAT2
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STA ZP2
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LDA #>:CAT2
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STA ZP2+1
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JSR STRCMP
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BCS :S3
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JSR STARCAT
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BRA :EXIT
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:S3 LDA #<:DIR
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STA ZP2
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LDA #>:DIR
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STA ZP2+1
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JSR STRCMP
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BCS :UNSUPP
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JSR CATALOG
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JSR STARDIR
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BRA :EXIT
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:UNSUPP LDA #<:OSCLIM
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LDY #>:OSCLIM
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@ -1410,6 +1505,8 @@ OSCLI PHX
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DB $0D
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:CAT2 ASC '*.'
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DB $0D
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:DIR ASC '*DIR'
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DB $0D
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:OSCLIM ASC 'OSCLI.'
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DB $00
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@ -1437,11 +1534,104 @@ STARQUIT LDA #<QUIT
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CLV ; Main ZP & LC
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JMP XFER
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CATALOG LDA #<:MSG
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STARCAT LDA STRTL
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STA TEMP1
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LDA STRTH
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STA TEMP2
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TSX
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STX $0101 ; Stash alt SP
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LDA #<CATALOG
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STA STRTL
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LDA #>CATALOG
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STA STRTH
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CLC ; Main memory
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CLV ; Main ZP & LC
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JMP XFER
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STARCATRET
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LDX $0101 ; Recover alt SP
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TXS
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LDA TEMP1
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STA STRTL
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LDA TEMP2
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STA STRTH
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RTS
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* Print one block of a catalog. Called by CATALOG
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* Block is in AUXBLK
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PRONEBLK LDX $0101 ; Recover alt SP
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TXS
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LDA AUXBLK+4 ; Get storage type
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AND #$E0 ; Mask 3 MSBs
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CMP #$E0
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BNE :NOTKEY ; Not a key block
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LDA #<:DIRM
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LDY #>:DIRM
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JSR PRSTR
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:NOTKEY LDA #$00
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:L1 PHA
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JSR PRONEENT
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PLA
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INC
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CMP #13 ; Number of dirents in block
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BNE :L1
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BRA :END
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:END LDA STRTL
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STA TEMP1
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LDA STRTH
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STA TEMP2
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LDA #<CATALOGRET
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STA STRTL
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LDA #>CATALOGRET
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STA STRTH
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CLC ; Main memory
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CLV ; Main ZP & LC
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JMP XFER
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:DIRM ASC 'Directory: '
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DB $00
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* Print a single directory entry
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* On entry: A = dirent index in AUXBLK
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PRONEENT TAX
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LDA #<AUXBLK+4 ; Skip pointers
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STA ZP3
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LDA #>AUXBLK+4
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STA ZP3+1
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:L1 CPX #$00
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BEQ :S1
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CLC
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LDA #$27 ; Size of dirent
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ADC ZP3
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STA ZP3
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LDA #$00
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ADC ZP3+1
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STA ZP3+1
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DEX
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BRA :L1
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:S1 LDY #$00
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LDA (ZP3),Y
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BEQ :EXIT ; Inactive entry
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AND #$0F ; Len of filename
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TAX
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LDY #$01
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:L2 CPX #$00
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BEQ :S2
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LDA (ZP3),Y
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JSR $FFEE ; OSWRCH
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DEX
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INY
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BRA :L2
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:S2 JSR $FFE7 ; OSNEWL
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:EXIT RTS
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* Command line is in ZP1
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STARDIR LDA #<:MSG
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LDY #>:MSG
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JSR PRSTR
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RTS
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:MSG ASC 'Catalog'
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:MSG ASC 'Dir:'
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DB $0A,$0D,$00
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* Performs OSBYTE $81 INKEY$ function
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