2022-02-07 02:06:22 +00:00
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ca65 V2.18 - N/A
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2021-12-28 14:49:12 +00:00
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Main file : RPi.Command.asm
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Current file: RPi.Command.asm
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2022-02-07 02:06:22 +00:00
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000000r 1 ; Copyright Terence J. Boldt (c)2021-2022
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000000r 1 ; Use of this source code is governed by an MIT
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000000r 1 ; license that can be found in the LICENSE file.
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000000r 1
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000000r 1 ; This file contains the source for the RPI.COMMAND
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000000r 1 ; application that runs on the Apple II and extends
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000000r 1 ; ProDOS BASIC.SYSTEM to add the RPI command which
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000000r 1 ; allows commands to be executed on the Raspberry Pi
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000000r 1
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2021-12-28 14:49:12 +00:00
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000000r 1 .ORG $300
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000300 1 INBUF = $200 ;GETLN input buffer.
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000300 1 WAIT = $FCA8 ;Monitor wait routine.
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000300 1 BELL = $FF3A ;Monitor bell routine.
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000300 1 EXTRNCMD = $BE06 ;External cmd JMP vector.
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000300 1 XTRNADDR = $BE50 ;Ext cmd implementation addr.
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000300 1 XLEN = $BE52 ;length of command string-1.
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000300 1 XCNUM = $BE53 ;CI cmd no. (ext cmd - 0).
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000300 1 PBITS = $BE54 ;Command parameter bits.
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2021-12-28 21:23:27 +00:00
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000300 1 XRETURN = $FF58 ;Known RTS instruction.
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2022-02-07 02:06:22 +00:00
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000300 1 InputByte = $c08e
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000300 1 OutputByte = $c08d
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000300 1 InputFlags = $c08b
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000300 1 OutputFlags = $c087
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2021-12-28 14:49:12 +00:00
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000300 1
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000300 1 ReadBlockCommand = $01
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000300 1 WriteBlockCommand = $02
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000300 1 GetTimeCommand = $03
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000300 1 ChangeDriveCommand = $04
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000300 1 ExecCommand = $05
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000300 1 LoadFileCommand = $06
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000300 1 SaveFileCommand = $07
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000300 1 MenuCommand = $08
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000300 1
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000300 1 InputString = $fd67
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000300 1 PrintChar = $fded
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000300 1 Keyboard = $c000
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000300 1 ClearKeyboard = $c010
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000300 1 Wait = $fca8
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000300 1
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2022-02-07 02:06:22 +00:00
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000300 1 LastChar = $06
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000300 1 SlotL = $fe
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000300 1 SlotH = $ff
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000300 1 ESC = $9b
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000300 1
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000300 1 .org $2000
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002000 1 A2 07 ldx #$07 ; start at slot 7
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002002 1 DetectSlot:
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002002 1 A0 00 ldy #$00
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002004 1 A9 FC lda #$fc
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002006 1 85 FE sta SlotL
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002008 1 8A txa
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002009 1 09 C0 ora #$c0
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00200B 1 85 FF sta SlotH
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00200D 1 B1 FE lda (SlotL),y
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00200F 1 D0 1C bne nextSlot
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002011 1 C8 iny
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002012 1 B1 FE lda (SlotL),y
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002014 1 D0 17 bne nextSlot
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002016 1 C8 iny
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002017 1 B1 FE lda (SlotL),y
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002019 1 C9 17 cmp #$17
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00201B 1 D0 10 bne nextSlot
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00201D 1 C8 iny
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00201E 1 B1 FE lda (SlotL),y
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002020 1 C9 14 cmp #$14
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002022 1 D0 09 bne nextSlot
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002024 1 8A txa
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002025 1 0A asl
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002026 1 0A asl
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002027 1 0A asl
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002028 1 0A asl
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002029 1 AA tax
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00202A 1 18 clc
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00202B 1 90 04 bcc Start
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00202D 1 nextSlot:
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00202D 1 CA dex
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00202E 1 D0 D2 bne DetectSlot
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002030 1 60 rts
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002031 1 Start:
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002031 1 8E 48 21 stx slotx + $1e01 ;set the slot for the driver
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002034 1 A2 00 ldx #$00
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002036 1 copyDriver:
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002036 1 BD 00 21 lda $2100,x
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002039 1 9D 00 03 sta $0300,x
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00203C 1 E8 inx
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00203D 1 E0 E6 cpx #$e6
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00203F 1 D0 F5 bne copyDriver
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002041 1 end:
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002041 1 4C 00 03 jmp $0300
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002044 1
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2022-02-08 03:01:06 +00:00
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002044 1 00 00 00 00 .repeat 253-<end
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2022-02-07 02:06:22 +00:00
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002048 1 00 00 00 00
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00204C 1 00 00 00 00
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2022-02-08 03:01:06 +00:00
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002100 1 .byte 0
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002100 1 .endrepeat
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002100 1
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002100 1 .org $0300
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2021-12-28 14:49:12 +00:00
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000300 1 ;
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000300 1 ; FIRST SAVE THE EXTERNAL COMMAND ADDRESS SO YOU WON'T
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000300 1 ; DISCONNECT ANY PREVIOUSLY CONNECTED COMMAND.
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000300 1 ;
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000300 1 AD 07 BE LDA EXTRNCMD+1
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2022-02-07 02:06:22 +00:00
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000303 1 8D E5 03 STA NXTCMD
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2021-12-28 14:49:12 +00:00
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000306 1 AD 08 BE LDA EXTRNCMD+2
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2022-02-07 02:06:22 +00:00
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000309 1 8D E6 03 STA NXTCMD+1
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2021-12-28 14:49:12 +00:00
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00030C 1 ;
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00030C 1 A9 17 LDA #<RPI ;Install the address of our
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00030E 1 8D 07 BE STA EXTRNCMD+1 ; command handler in the
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000311 1 A9 03 LDA #>RPI ; external command JMP
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000313 1 8D 08 BE STA EXTRNCMD+2 ; vector.
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000316 1 60 RTS
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000317 1 ;
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000317 1 A2 00 RPI: LDX #0 ;Check for our command.
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000319 1 BD 00 02 NXTCHR: LDA INBUF,X ;Get first character.
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00031C 1 09 20 ora #$20 ;Make it lower case
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2022-02-07 02:06:22 +00:00
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00031E 1 DD E2 03 CMP CMD,X ;Does it match?
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000321 1 D0 29 BNE NOTOURS ;No, back to CI.
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2021-12-28 14:49:12 +00:00
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000323 1 E8 INX ;Next character
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000324 1 E0 03 CPX #CMDLEN ;All characters yet?
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000326 1 D0 F1 BNE NXTCHR ;No, read next one.
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000328 1 ;
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000328 1 A9 02 LDA #CMDLEN-1 ;Our cmd! Put cmd length-1
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2021-12-28 21:23:27 +00:00
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00032A 1 ;lda #$8d
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00032A 1 ;sta $02ff
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00032A 1 ;lda #$fe
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2021-12-28 14:49:12 +00:00
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00032A 1 8D 52 BE STA XLEN ; in CI global XLEN.
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2021-12-28 21:23:27 +00:00
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00032D 1 A9 58 LDA #<XRETURN ;Point XTRNADDR to a known
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2021-12-28 14:49:12 +00:00
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00032F 1 8D 50 BE STA XTRNADDR ; RTS since we'll handle
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2021-12-28 21:23:27 +00:00
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000332 1 A9 FF LDA #>XRETURN ; at the time we intercept
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2021-12-28 14:49:12 +00:00
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000334 1
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000334 1 8D 51 BE STA XTRNADDR+1 ; our command.
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000337 1 A9 00 LDA #0 ;Mark the cmd number as
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000339 1 8D 53 BE STA XCNUM ; zero (external).
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00033C 1 8D 54 BE STA PBITS ;And indicate no parameters
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00033F 1 8D 55 BE STA PBITS+1 ; to be parsed.
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000342 1 A9 8D lda #$8d
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000344 1 20 ED FD jsr $fded
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2022-02-07 02:06:22 +00:00
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000347 1 A2 70 slotx: ldx #$70 ; set x to slot # in high nibble
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000349 1 18 clc
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00034A 1 90 04 bcc SendCommand
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00034C 1 ;
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00034C 1 38 NOTOURS: SEC ; ALWAYS SET CARRY IF NOT YOUR
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00034D 1 6C E5 03 JMP (NXTCMD) ; CMD AND LET NEXT COMMAND TRY
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000350 1 ; ; TO CLAIM IT.
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000350 1
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000350 1 SendCommand:
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000350 1 2C 10 C0 bit ClearKeyboard
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000353 1 A9 05 lda #$05 ;send command 5 = exec
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000355 1 20 9B 03 jsr SendByte
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000358 1 A0 03 ldy #$03 ;skip over "RPI"
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00035A 1 getInput:
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00035A 1 B9 00 02 lda $0200,y
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00035D 1 C9 8D cmp #$8d
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00035F 1 F0 08 beq sendNullTerminator
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000361 1 29 7F and #$7f
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000363 1 20 9B 03 jsr SendByte
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000366 1 C8 iny
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000367 1 D0 F1 bne getInput
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000369 1 sendNullTerminator:
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000369 1 A9 00 lda #$00
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00036B 1 20 9B 03 jsr SendByte
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00036E 1 DumpOutput:
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00036E 1 20 B9 03 jsr GetByte
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000371 1 B0 07 bcs skipOutput
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000373 1 C9 00 cmp #$00
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000375 1 F0 19 beq endOutput
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000377 1 20 ED FD jsr PrintChar
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00037A 1 skipOutput:
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00037A 1 2C 00 C0 bit Keyboard ;check for keypress
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00037D 1 10 EF bpl DumpOutput ;keep dumping output if no keypress
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00037F 1 AD 00 C0 lda Keyboard ;send keypress to RPi
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000382 1 20 ED FD jsr PrintChar
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000385 1 29 7F and #$7f
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000387 1 20 9B 03 jsr SendByte
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00038A 1 2C 10 C0 bit ClearKeyboard
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00038D 1 18 clc
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00038E 1 90 DE bcc DumpOutput
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000390 1 endOutput:
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000390 1 18 clc
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000391 1 6C E5 03 jmp (NXTCMD)
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000394 1
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000394 1 HelpCommand:
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000394 1 61 32 68 65 .byte "a2help",$00
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000398 1 6C 70 00
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00039B 1
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00039B 1 SendByte:
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00039B 1 48 pha
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00039C 1 waitWrite:
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00039C 1 BD 8B C0 lda InputFlags,x
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00039F 1 2A rol
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0003A0 1 2A rol
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0003A1 1 B0 F9 bcs waitWrite
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0003A3 1 68 pla
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0003A4 1 9D 8D C0 sta OutputByte,x
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0003A7 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
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0003A9 1 9D 87 C0 sta OutputFlags,x
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0003AC 1 finishWrite:
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0003AC 1 BD 8B C0 lda InputFlags,x
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0003AF 1 2A rol
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0003B0 1 2A rol
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0003B1 1 90 F9 bcc finishWrite
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0003B3 1 A9 1F lda #$1f
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0003B5 1 9D 87 C0 sta OutputFlags,x
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0003B8 1 60 rts
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0003B9 1
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0003B9 1 GetByte:
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0003B9 1 A9 1D lda #$1d ;set read flag low
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0003BB 1 9D 87 C0 sta OutputFlags,x
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0003BE 1 waitRead:
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0003BE 1 BD 8B C0 lda InputFlags,x
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0003C1 1 2A rol
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0003C2 1 90 0C bcc readByte
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0003C4 1 2C 00 C0 bit Keyboard ;keypress will abort waiting to read
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0003C7 1 10 F5 bpl waitRead
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0003C9 1 A9 1F lda #$1f ;set all flags high and exit
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0003CB 1 9D 87 C0 sta OutputFlags,x
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0003CE 1 38 sec ;failure
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0003CF 1 60 rts
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0003D0 1 readByte:
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0003D0 1 BD 8E C0 lda InputByte,x
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0003D3 1 48 pha
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0003D4 1 A9 1F lda #$1f ;set all flags high
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0003D6 1 9D 87 C0 sta OutputFlags,x
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0003D9 1 finishRead:
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0003D9 1 BD 8B C0 lda InputFlags,x
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0003DC 1 2A rol
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0003DD 1 90 FA bcc finishRead
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0003DF 1 68 pla
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0003E0 1 18 clc ;success
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0003E1 1 60 rts
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0003E2 1
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0003E2 1
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0003E2 1 ;macro for string with high-bit set
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0003E2 1 .macro aschi str
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0003E2 1 .repeat .strlen (str), c
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0003E2 1 .byte .strat (str, c) | $80
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0003E2 1 .endrep
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0003E2 1 .endmacro
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0003E2 1
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0003E2 1 F2 F0 E9 CMD: aschi "rpi"
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0003E5 1 CMDLEN = 3 ;Our command length
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0003E5 1 ;
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0003E5 1 00 00 NXTCMD: .byte 0,0 ; STORE THE NEXT EXT CMD'S
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0003E7 1 ; ADDRESS HERE.
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0003E7 1
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0003E7 1
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0003E7 1
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