mirror of
https://github.com/tjboldt/Apple2-IO-RPi.git
synced 2024-11-22 02:30:46 +00:00
275 lines
12 KiB
Plaintext
275 lines
12 KiB
Plaintext
ca65 V2.18 - Raspbian 2.19-1
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Main file : RPi.Command.asm
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Current file: RPi.Command.asm
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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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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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000300 1 XRETURN = $FF58 ;Known RTS instruction.
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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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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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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 ;macro for string with high-bit set
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000300 1 .macro aschi str
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000300 1 .repeat .strlen (str), c
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000300 1 .byte .strat (str, c) | $80
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000300 1 .endrep
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000300 1 .endmacro
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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 31 21 stx slotx + $1e01 ;set the slot for the driver
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002034 1 A0 00 ldy #$00
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002036 1 PrintString:
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002036 1 B9 93 20 lda Text,y
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002039 1 F0 08 beq copyDriver
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00203B 1 09 80 ora #$80
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00203D 1 20 ED FD jsr PrintChar
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002040 1 C8 iny
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002041 1 D0 F3 bne PrintString
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002043 1 copyDriver:
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002043 1 A0 00 ldy #$00
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002045 1 copyDriverByte:
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002045 1 B9 00 21 lda $2100,y
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002048 1 99 00 03 sta $0300,y
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00204B 1 C8 iny
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00204C 1 C0 E6 cpy #$e6
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00204E 1 D0 F5 bne copyDriverByte
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002050 1 ;
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002050 1 ; FIRST SAVE THE EXTERNAL COMMAND ADDRESS SO YOU WON'T
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002050 1 ; DISCONNECT ANY PREVIOUSLY CONNECTED COMMAND.
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002050 1 ;
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002050 1 AD 07 BE LDA EXTRNCMD+1
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002053 1 8D AD 03 STA NXTCMD
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002056 1 AD 08 BE LDA EXTRNCMD+2
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002059 1 8D AE 03 STA NXTCMD+1
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00205C 1 ;
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00205C 1 A9 00 LDA #<RPI ;Install the address of our
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00205E 1 8D 07 BE STA EXTRNCMD+1 ; command handler in the
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002061 1 A9 03 LDA #>RPI ; external command JMP
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002063 1 8D 08 BE STA EXTRNCMD+2 ; vector.
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002066 1
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002066 1 A9 05 lda #ExecCommand
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002068 1 20 6F 03 jsr SendByte
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00206B 1 A0 00 ldy #$00
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00206D 1 nextCommandByte:
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00206D 1 B9 8C 20 lda a2help, y
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002070 1 F0 07 beq finishCommand
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002072 1 20 6F 03 jsr SendByte
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002075 1 C8 iny
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002076 1 4C 6D 20 jmp nextCommandByte
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002079 1 finishCommand:
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002079 1 A9 00 lda #$00
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00207B 1 20 6F 03 jsr SendByte
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00207E 1 showVersion:
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00207E 1 20 8D 03 jsr GetByte
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002081 1 C9 00 cmp #$00
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002083 1 F0 06 beq FinishDriver
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002085 1 20 ED FD jsr PrintChar
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002088 1 4C 7E 20 jmp showVersion
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00208B 1 FinishDriver:
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00208B 1 60 rts
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00208C 1
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00208C 1 a2help:
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00208C 1 61 32 68 65 .byte "a2help", $00
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002090 1 6C 70 00
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002093 1
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002093 1 Text:
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002093 1 D2 D0 C9 A0 aschi "RPI command version: 000E"
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002097 1 E3 EF ED ED
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00209B 1 E1 EE E4 A0
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0020AC 1 8D .byte $8d
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0020AD 1 end:
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0020AD 1 00 .byte $00
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0020AE 1
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0020AE 1 00 00 00 00 .repeat 255-<end
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0020B2 1 00 00 00 00
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0020B6 1 00 00 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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000300 1 A2 00 RPI: LDX #0 ;Check for our command.
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000302 1 BD 00 02 NXTCHR: LDA INBUF,X ;Get first character.
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000305 1 09 20 ora #$20 ;Make it lower case
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000307 1 DD AA 03 CMP CMD,X ;Does it match?
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00030A 1 D0 29 BNE NOTOURS ;No, back to CI.
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00030C 1 E8 INX ;Next character
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00030D 1 E0 03 CPX #CMDLEN ;All characters yet?
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00030F 1 D0 F1 BNE NXTCHR ;No, read next one.
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000311 1 ;
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000311 1 A9 02 LDA #CMDLEN-1 ;Our cmd! Put cmd length-1
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000313 1 ;lda #$8d
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000313 1 ;sta $02ff
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000313 1 ;lda #$fe
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000313 1 8D 52 BE STA XLEN ; in CI global XLEN.
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000316 1 A9 58 LDA #<XRETURN ;Point XTRNADDR to a known
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000318 1 8D 50 BE STA XTRNADDR ; RTS since we'll handle
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00031B 1 A9 FF LDA #>XRETURN ; at the time we intercept
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00031D 1
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00031D 1 8D 51 BE STA XTRNADDR+1 ; our command.
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000320 1 A9 00 LDA #0 ;Mark the cmd number as
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000322 1 8D 53 BE STA XCNUM ; zero (external).
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000325 1 8D 54 BE STA PBITS ;And indicate no parameters
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000328 1 8D 55 BE STA PBITS+1 ; to be parsed.
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00032B 1 A9 8D lda #$8d
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00032D 1 20 ED FD jsr $fded
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000330 1 A2 70 slotx: ldx #$70 ; set x to slot # in high nibble
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000332 1 18 clc
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000333 1 90 04 bcc SendCommand
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000335 1 ;
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000335 1 38 NOTOURS: SEC ; ALWAYS SET CARRY IF NOT YOUR
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000336 1 6C AD 03 JMP (NXTCMD) ; CMD AND LET NEXT COMMAND TRY
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000339 1 ; ; TO CLAIM IT.
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000339 1
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000339 1 SendCommand:
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000339 1 2C 10 C0 bit ClearKeyboard
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00033C 1 A9 05 lda #$05 ;send command 5 = exec
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00033E 1 20 6F 03 jsr SendByte
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000341 1 A0 03 ldy #$03 ;skip over "RPI"
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000343 1 getInput:
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000343 1 B9 00 02 lda $0200,y
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000346 1 C9 8D cmp #$8d
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000348 1 F0 08 beq sendNullTerminator
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00034A 1 29 7F and #$7f
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00034C 1 20 6F 03 jsr SendByte
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00034F 1 C8 iny
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000350 1 D0 F1 bne getInput
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000352 1 sendNullTerminator:
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000352 1 A9 00 lda #$00
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000354 1 20 6F 03 jsr SendByte
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000357 1 DumpOutput:
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000357 1 20 8D 03 jsr GetByte
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00035A 1 C9 00 cmp #$00
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00035C 1 F0 06 beq endOutput
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00035E 1 20 ED FD jsr PrintChar
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000361 1 18 clc
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000362 1 90 F3 bcc DumpOutput
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000364 1 endOutput:
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000364 1 18 clc
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000365 1 6C AD 03 jmp (NXTCMD)
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000368 1
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000368 1 HelpCommand:
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000368 1 61 32 68 65 .byte "a2help",$00
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00036C 1 6C 70 00
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00036F 1
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00036F 1 SendByte:
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00036F 1 48 pha
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000370 1 waitWrite:
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000370 1 BD 8B C0 lda InputFlags,x
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000373 1 2A rol
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000374 1 2A rol
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000375 1 B0 F9 bcs waitWrite
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000377 1 68 pla
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000378 1 9D 8D C0 sta OutputByte,x
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00037B 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
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00037D 1 9D 87 C0 sta OutputFlags,x
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000380 1 finishWrite:
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000380 1 BD 8B C0 lda InputFlags,x
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000383 1 2A rol
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000384 1 2A rol
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000385 1 90 F9 bcc finishWrite
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000387 1 A9 1F lda #$1f
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000389 1 9D 87 C0 sta OutputFlags,x
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00038C 1 60 rts
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00038D 1
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00038D 1 GetByte:
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00038D 1 A9 1D lda #$1d ;set read flag low
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00038F 1 9D 87 C0 sta OutputFlags,x
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000392 1 waitRead:
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000392 1 BD 8B C0 lda InputFlags,x
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000395 1 2A rol
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000396 1 B0 FA bcs waitRead
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000398 1 readByte:
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000398 1 BD 8E C0 lda InputByte,x
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00039B 1 48 pha
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00039C 1 A9 1F lda #$1f ;set all flags high
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00039E 1 9D 87 C0 sta OutputFlags,x
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0003A1 1 finishRead:
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0003A1 1 BD 8B C0 lda InputFlags,x
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0003A4 1 2A rol
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0003A5 1 90 FA bcc finishRead
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0003A7 1 68 pla
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0003A8 1 18 clc ;success
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0003A9 1 60 rts
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0003AA 1
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0003AA 1
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0003AA 1 F2 F0 E9 CMD: aschi "rpi"
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0003AD 1 CMDLEN = 3 ;Our command length
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0003AD 1 ;
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0003AD 1 00 00 NXTCMD: .byte 0,0 ; STORE THE NEXT EXT CMD'S
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0003AF 1 ; ADDRESS HERE.
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0003AF 1
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0003AF 1
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0003AF 1
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