ca65 V2.18 - N/A 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 .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 48 21 stx slotx + $1e01 ;set the slot for the driver 002034 1 A2 00 ldx #$00 002036 1 copyDriver: 002036 1 BD 00 21 lda $2100,x 002039 1 9D 00 03 sta $0300,x 00203C 1 E8 inx 00203D 1 E0 E6 cpx #$e6 00203F 1 D0 F5 bne copyDriver 002041 1 end: 002041 1 4C 00 03 jmp $0300 002044 1 002044 1 00 00 00 00 .repeat 255-RPI ; external command JMP 000313 1 8D 08 BE STA EXTRNCMD+2 ; vector. 000316 1 60 RTS 000317 1 ; 000317 1 A2 00 RPI: LDX #0 ;Check for our command. 000319 1 BD 00 02 NXTCHR: LDA INBUF,X ;Get first character. 00031C 1 09 20 ora #$20 ;Make it lower case 00031E 1 DD E2 03 CMP CMD,X ;Does it match? 000321 1 D0 29 BNE NOTOURS ;No, back to CI. 000323 1 E8 INX ;Next character 000324 1 E0 03 CPX #CMDLEN ;All characters yet? 000326 1 D0 F1 BNE NXTCHR ;No, read next one. 000328 1 ; 000328 1 A9 02 LDA #CMDLEN-1 ;Our cmd! Put cmd length-1 00032A 1 ;lda #$8d 00032A 1 ;sta $02ff 00032A 1 ;lda #$fe 00032A 1 8D 52 BE STA XLEN ; in CI global XLEN. 00032D 1 A9 58 LDA #XRETURN ; at the time we intercept 000334 1 000334 1 8D 51 BE STA XTRNADDR+1 ; our command. 000337 1 A9 00 LDA #0 ;Mark the cmd number as 000339 1 8D 53 BE STA XCNUM ; zero (external). 00033C 1 8D 54 BE STA PBITS ;And indicate no parameters 00033F 1 8D 55 BE STA PBITS+1 ; to be parsed. 000342 1 A9 8D lda #$8d 000344 1 20 ED FD jsr $fded 000347 1 A2 70 slotx: ldx #$70 ; set x to slot # in high nibble 000349 1 18 clc 00034A 1 90 04 bcc SendCommand 00034C 1 ; 00034C 1 38 NOTOURS: SEC ; ALWAYS SET CARRY IF NOT YOUR 00034D 1 6C E5 03 JMP (NXTCMD) ; CMD AND LET NEXT COMMAND TRY 000350 1 ; ; TO CLAIM IT. 000350 1 000350 1 SendCommand: 000350 1 2C 10 C0 bit ClearKeyboard 000353 1 A9 05 lda #$05 ;send command 5 = exec 000355 1 20 9B 03 jsr SendByte 000358 1 A0 03 ldy #$03 ;skip over "RPI" 00035A 1 getInput: 00035A 1 B9 00 02 lda $0200,y 00035D 1 C9 8D cmp #$8d 00035F 1 F0 08 beq sendNullTerminator 000361 1 29 7F and #$7f 000363 1 20 9B 03 jsr SendByte 000366 1 C8 iny 000367 1 D0 F1 bne getInput 000369 1 sendNullTerminator: 000369 1 A9 00 lda #$00 00036B 1 20 9B 03 jsr SendByte 00036E 1 DumpOutput: 00036E 1 20 B9 03 jsr GetByte 000371 1 B0 07 bcs skipOutput 000373 1 C9 00 cmp #$00 000375 1 F0 19 beq endOutput 000377 1 20 ED FD jsr PrintChar 00037A 1 skipOutput: 00037A 1 2C 00 C0 bit Keyboard ;check for keypress 00037D 1 10 EF bpl DumpOutput ;keep dumping output if no keypress 00037F 1 AD 00 C0 lda Keyboard ;send keypress to RPi 000382 1 20 ED FD jsr PrintChar 000385 1 29 7F and #$7f 000387 1 20 9B 03 jsr SendByte 00038A 1 2C 10 C0 bit ClearKeyboard 00038D 1 18 clc 00038E 1 90 DE bcc DumpOutput 000390 1 endOutput: 000390 1 18 clc 000391 1 6C E5 03 jmp (NXTCMD) 000394 1 000394 1 HelpCommand: 000394 1 61 32 68 65 .byte "a2help",$00 000398 1 6C 70 00 00039B 1 00039B 1 SendByte: 00039B 1 48 pha 00039C 1 waitWrite: 00039C 1 BD 8B C0 lda InputFlags,x 00039F 1 2A rol 0003A0 1 2A rol 0003A1 1 B0 F9 bcs waitWrite 0003A3 1 68 pla 0003A4 1 9D 8D C0 sta OutputByte,x 0003A7 1 A9 1E lda #$1e ; set bit 0 low to indicate write started 0003A9 1 9D 87 C0 sta OutputFlags,x 0003AC 1 finishWrite: 0003AC 1 BD 8B C0 lda InputFlags,x 0003AF 1 2A rol 0003B0 1 2A rol 0003B1 1 90 F9 bcc finishWrite 0003B3 1 A9 1F lda #$1f 0003B5 1 9D 87 C0 sta OutputFlags,x 0003B8 1 60 rts 0003B9 1 0003B9 1 GetByte: 0003B9 1 A9 1D lda #$1d ;set read flag low 0003BB 1 9D 87 C0 sta OutputFlags,x 0003BE 1 waitRead: 0003BE 1 BD 8B C0 lda InputFlags,x 0003C1 1 2A rol 0003C2 1 90 0C bcc readByte 0003C4 1 2C 00 C0 bit Keyboard ;keypress will abort waiting to read 0003C7 1 10 F5 bpl waitRead 0003C9 1 A9 1F lda #$1f ;set all flags high and exit 0003CB 1 9D 87 C0 sta OutputFlags,x 0003CE 1 38 sec ;failure 0003CF 1 60 rts 0003D0 1 readByte: 0003D0 1 BD 8E C0 lda InputByte,x 0003D3 1 48 pha 0003D4 1 A9 1F lda #$1f ;set all flags high 0003D6 1 9D 87 C0 sta OutputFlags,x 0003D9 1 finishRead: 0003D9 1 BD 8B C0 lda InputFlags,x 0003DC 1 2A rol 0003DD 1 90 FA bcc finishRead 0003DF 1 68 pla 0003E0 1 18 clc ;success 0003E1 1 60 rts 0003E2 1 0003E2 1 0003E2 1 ;macro for string with high-bit set 0003E2 1 .macro aschi str 0003E2 1 .repeat .strlen (str), c 0003E2 1 .byte .strat (str, c) | $80 0003E2 1 .endrep 0003E2 1 .endmacro 0003E2 1 0003E2 1 F2 F0 E9 CMD: aschi "rpi" 0003E5 1 CMDLEN = 3 ;Our command length 0003E5 1 ; 0003E5 1 00 00 NXTCMD: .byte 0,0 ; STORE THE NEXT EXT CMD'S 0003E7 1 ; ADDRESS HERE. 0003E7 1 0003E7 1 0003E7 1