Apple2-IO-RPi/Apple2/RPi.Command.lst
2022-04-27 22:36:27 -04:00

275 lines
12 KiB
Plaintext

ca65 V2.18 - Raspbian 2.19-1
Main file : RPi.Command.asm
Current file: RPi.Command.asm
000000r 1 ; Copyright Terence J. Boldt (c)2021-2022
000000r 1 ; Use of this source code is governed by an MIT
000000r 1 ; license that can be found in the LICENSE file.
000000r 1
000000r 1 ; This file contains the source for the RPI.COMMAND
000000r 1 ; application that runs on the Apple II and extends
000000r 1 ; ProDOS BASIC.SYSTEM to add the RPI command which
000000r 1 ; allows commands to be executed on the Raspberry Pi
000000r 1
000000r 1 .ORG $300
000300 1 INBUF = $200 ;GETLN input buffer.
000300 1 WAIT = $FCA8 ;Monitor wait routine.
000300 1 BELL = $FF3A ;Monitor bell routine.
000300 1 EXTRNCMD = $BE06 ;External cmd JMP vector.
000300 1 XTRNADDR = $BE50 ;Ext cmd implementation addr.
000300 1 XLEN = $BE52 ;length of command string-1.
000300 1 XCNUM = $BE53 ;CI cmd no. (ext cmd - 0).
000300 1 PBITS = $BE54 ;Command parameter bits.
000300 1 XRETURN = $FF58 ;Known RTS instruction.
000300 1 InputByte = $c08e
000300 1 OutputByte = $c08d
000300 1 InputFlags = $c08b
000300 1 OutputFlags = $c087
000300 1
000300 1 ReadBlockCommand = $01
000300 1 WriteBlockCommand = $02
000300 1 GetTimeCommand = $03
000300 1 ChangeDriveCommand = $04
000300 1 ExecCommand = $05
000300 1 LoadFileCommand = $06
000300 1 SaveFileCommand = $07
000300 1 MenuCommand = $08
000300 1
000300 1 InputString = $fd67
000300 1 PrintChar = $fded
000300 1 Keyboard = $c000
000300 1 ClearKeyboard = $c010
000300 1 Wait = $fca8
000300 1
000300 1 LastChar = $06
000300 1 SlotL = $fe
000300 1 SlotH = $ff
000300 1 ESC = $9b
000300 1
000300 1 ;macro for string with high-bit set
000300 1 .macro aschi str
000300 1 .repeat .strlen (str), c
000300 1 .byte .strat (str, c) | $80
000300 1 .endrep
000300 1 .endmacro
000300 1
000300 1 .org $2000
002000 1 A2 07 ldx #$07 ; start at slot 7
002002 1 DetectSlot:
002002 1 A0 00 ldy #$00
002004 1 A9 FC lda #$fc
002006 1 85 FE sta SlotL
002008 1 8A txa
002009 1 09 C0 ora #$c0
00200B 1 85 FF sta SlotH
00200D 1 B1 FE lda (SlotL),y
00200F 1 D0 1C bne nextSlot
002011 1 C8 iny
002012 1 B1 FE lda (SlotL),y
002014 1 D0 17 bne nextSlot
002016 1 C8 iny
002017 1 B1 FE lda (SlotL),y
002019 1 C9 17 cmp #$17
00201B 1 D0 10 bne nextSlot
00201D 1 C8 iny
00201E 1 B1 FE lda (SlotL),y
002020 1 C9 14 cmp #$14
002022 1 D0 09 bne nextSlot
002024 1 8A txa
002025 1 0A asl
002026 1 0A asl
002027 1 0A asl
002028 1 0A asl
002029 1 AA tax
00202A 1 18 clc
00202B 1 90 04 bcc Start
00202D 1 nextSlot:
00202D 1 CA dex
00202E 1 D0 D2 bne DetectSlot
002030 1 60 rts
002031 1 Start:
002031 1 8E 31 21 stx slotx + $1e01 ;set the slot for the driver
002034 1 A0 00 ldy #$00
002036 1 PrintString:
002036 1 B9 93 20 lda Text,y
002039 1 F0 08 beq copyDriver
00203B 1 09 80 ora #$80
00203D 1 20 ED FD jsr PrintChar
002040 1 C8 iny
002041 1 D0 F3 bne PrintString
002043 1 copyDriver:
002043 1 A0 00 ldy #$00
002045 1 copyDriverByte:
002045 1 B9 00 21 lda $2100,y
002048 1 99 00 03 sta $0300,y
00204B 1 C8 iny
00204C 1 C0 E6 cpy #$e6
00204E 1 D0 F5 bne copyDriverByte
002050 1 ;
002050 1 ; FIRST SAVE THE EXTERNAL COMMAND ADDRESS SO YOU WON'T
002050 1 ; DISCONNECT ANY PREVIOUSLY CONNECTED COMMAND.
002050 1 ;
002050 1 AD 07 BE LDA EXTRNCMD+1
002053 1 8D AD 03 STA NXTCMD
002056 1 AD 08 BE LDA EXTRNCMD+2
002059 1 8D AE 03 STA NXTCMD+1
00205C 1 ;
00205C 1 A9 00 LDA #<RPI ;Install the address of our
00205E 1 8D 07 BE STA EXTRNCMD+1 ; command handler in the
002061 1 A9 03 LDA #>RPI ; external command JMP
002063 1 8D 08 BE STA EXTRNCMD+2 ; vector.
002066 1
002066 1 A9 05 lda #ExecCommand
002068 1 20 6F 03 jsr SendByte
00206B 1 A0 00 ldy #$00
00206D 1 nextCommandByte:
00206D 1 B9 8C 20 lda a2help, y
002070 1 F0 07 beq finishCommand
002072 1 20 6F 03 jsr SendByte
002075 1 C8 iny
002076 1 4C 6D 20 jmp nextCommandByte
002079 1 finishCommand:
002079 1 A9 00 lda #$00
00207B 1 20 6F 03 jsr SendByte
00207E 1 showVersion:
00207E 1 20 8D 03 jsr GetByte
002081 1 C9 00 cmp #$00
002083 1 F0 06 beq FinishDriver
002085 1 20 ED FD jsr PrintChar
002088 1 4C 7E 20 jmp showVersion
00208B 1 FinishDriver:
00208B 1 60 rts
00208C 1
00208C 1 a2help:
00208C 1 61 32 68 65 .byte "a2help", $00
002090 1 6C 70 00
002093 1
002093 1 Text:
002093 1 D2 D0 C9 A0 aschi "RPI command version: 000E"
002097 1 E3 EF ED ED
00209B 1 E1 EE E4 A0
0020AC 1 8D .byte $8d
0020AD 1 end:
0020AD 1 00 .byte $00
0020AE 1
0020AE 1 00 00 00 00 .repeat 255-<end
0020B2 1 00 00 00 00
0020B6 1 00 00 00 00
002100 1 .byte 0
002100 1 .endrepeat
002100 1
002100 1 .org $0300
000300 1 A2 00 RPI: LDX #0 ;Check for our command.
000302 1 BD 00 02 NXTCHR: LDA INBUF,X ;Get first character.
000305 1 09 20 ora #$20 ;Make it lower case
000307 1 DD AA 03 CMP CMD,X ;Does it match?
00030A 1 D0 29 BNE NOTOURS ;No, back to CI.
00030C 1 E8 INX ;Next character
00030D 1 E0 03 CPX #CMDLEN ;All characters yet?
00030F 1 D0 F1 BNE NXTCHR ;No, read next one.
000311 1 ;
000311 1 A9 02 LDA #CMDLEN-1 ;Our cmd! Put cmd length-1
000313 1 ;lda #$8d
000313 1 ;sta $02ff
000313 1 ;lda #$fe
000313 1 8D 52 BE STA XLEN ; in CI global XLEN.
000316 1 A9 58 LDA #<XRETURN ;Point XTRNADDR to a known
000318 1 8D 50 BE STA XTRNADDR ; RTS since we'll handle
00031B 1 A9 FF LDA #>XRETURN ; at the time we intercept
00031D 1
00031D 1 8D 51 BE STA XTRNADDR+1 ; our command.
000320 1 A9 00 LDA #0 ;Mark the cmd number as
000322 1 8D 53 BE STA XCNUM ; zero (external).
000325 1 8D 54 BE STA PBITS ;And indicate no parameters
000328 1 8D 55 BE STA PBITS+1 ; to be parsed.
00032B 1 A9 8D lda #$8d
00032D 1 20 ED FD jsr $fded
000330 1 A2 70 slotx: ldx #$70 ; set x to slot # in high nibble
000332 1 18 clc
000333 1 90 04 bcc SendCommand
000335 1 ;
000335 1 38 NOTOURS: SEC ; ALWAYS SET CARRY IF NOT YOUR
000336 1 6C AD 03 JMP (NXTCMD) ; CMD AND LET NEXT COMMAND TRY
000339 1 ; ; TO CLAIM IT.
000339 1
000339 1 SendCommand:
000339 1 2C 10 C0 bit ClearKeyboard
00033C 1 A9 05 lda #$05 ;send command 5 = exec
00033E 1 20 6F 03 jsr SendByte
000341 1 A0 03 ldy #$03 ;skip over "RPI"
000343 1 getInput:
000343 1 B9 00 02 lda $0200,y
000346 1 C9 8D cmp #$8d
000348 1 F0 08 beq sendNullTerminator
00034A 1 29 7F and #$7f
00034C 1 20 6F 03 jsr SendByte
00034F 1 C8 iny
000350 1 D0 F1 bne getInput
000352 1 sendNullTerminator:
000352 1 A9 00 lda #$00
000354 1 20 6F 03 jsr SendByte
000357 1 DumpOutput:
000357 1 20 8D 03 jsr GetByte
00035A 1 C9 00 cmp #$00
00035C 1 F0 06 beq endOutput
00035E 1 20 ED FD jsr PrintChar
000361 1 18 clc
000362 1 90 F3 bcc DumpOutput
000364 1 endOutput:
000364 1 18 clc
000365 1 6C AD 03 jmp (NXTCMD)
000368 1
000368 1 HelpCommand:
000368 1 61 32 68 65 .byte "a2help",$00
00036C 1 6C 70 00
00036F 1
00036F 1 SendByte:
00036F 1 48 pha
000370 1 waitWrite:
000370 1 BD 8B C0 lda InputFlags,x
000373 1 2A rol
000374 1 2A rol
000375 1 B0 F9 bcs waitWrite
000377 1 68 pla
000378 1 9D 8D C0 sta OutputByte,x
00037B 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
00037D 1 9D 87 C0 sta OutputFlags,x
000380 1 finishWrite:
000380 1 BD 8B C0 lda InputFlags,x
000383 1 2A rol
000384 1 2A rol
000385 1 90 F9 bcc finishWrite
000387 1 A9 1F lda #$1f
000389 1 9D 87 C0 sta OutputFlags,x
00038C 1 60 rts
00038D 1
00038D 1 GetByte:
00038D 1 A9 1D lda #$1d ;set read flag low
00038F 1 9D 87 C0 sta OutputFlags,x
000392 1 waitRead:
000392 1 BD 8B C0 lda InputFlags,x
000395 1 2A rol
000396 1 B0 FA bcs waitRead
000398 1 readByte:
000398 1 BD 8E C0 lda InputByte,x
00039B 1 48 pha
00039C 1 A9 1F lda #$1f ;set all flags high
00039E 1 9D 87 C0 sta OutputFlags,x
0003A1 1 finishRead:
0003A1 1 BD 8B C0 lda InputFlags,x
0003A4 1 2A rol
0003A5 1 90 FA bcc finishRead
0003A7 1 68 pla
0003A8 1 18 clc ;success
0003A9 1 60 rts
0003AA 1
0003AA 1
0003AA 1 F2 F0 E9 CMD: aschi "rpi"
0003AD 1 CMDLEN = 3 ;Our command length
0003AD 1 ;
0003AD 1 00 00 NXTCMD: .byte 0,0 ; STORE THE NEXT EXT CMD'S
0003AF 1 ; ADDRESS HERE.
0003AF 1
0003AF 1
0003AF 1