forked from Apple-2-HW/Apple2-IO-RPi
214 lines
8.0 KiB
Plaintext
214 lines
8.0 KiB
Plaintext
|
ca65 V2.17 - Raspbian 2.17-1
|
||
|
|
Main file : Shell.asm
|
||
|
|
Current file: Shell.asm
|
||
|
|
|
||
|
|
000000r 1 ;ProDOS Zero Page
|
||
|
|
000000r 1 Command = $42 ;ProDOS Command
|
||
|
|
000000r 1 Unit = $43 ;ProDOS unit (SDDD0000)
|
||
|
|
000000r 1 BufferLo = $44
|
||
|
|
000000r 1 BufferHi = $45
|
||
|
|
000000r 1 BlockLo = $46
|
||
|
|
000000r 1 BlockHi = $47
|
||
|
|
000000r 1
|
||
|
|
000000r 1 ; ProDOS Error Codes
|
||
|
|
000000r 1 IOError = $27
|
||
|
|
000000r 1 NoDevice = $28
|
||
|
|
000000r 1 WriteProtect = $2B
|
||
|
|
000000r 1
|
||
|
|
000000r 1 ; hard code slot to 7 for now, will make it auto-detect later
|
||
|
|
000000r 1 SLOT = 7
|
||
|
|
000000r 1
|
||
|
|
000000r 1 InputByte = $c08e+SLOT*$10
|
||
|
|
000000r 1 OutputByte = $c08d+SLOT*$10
|
||
|
|
000000r 1 InputFlags = $c08b+SLOT*$10
|
||
|
|
000000r 1 OutputFlags = $c087+SLOT*$10
|
||
|
|
000000r 1
|
||
|
|
000000r 1 ReadBlockCommand = $01
|
||
|
|
000000r 1 WriteBlockCommand = $02
|
||
|
|
000000r 1 GetTimeCommand = $03
|
||
|
|
000000r 1 ChangeDriveCommand = $04
|
||
|
|
000000r 1 ExecCommand = $05
|
||
|
|
000000r 1 LoadFileCommand = $06
|
||
|
|
000000r 1 SaveFileCommand = $07
|
||
|
|
000000r 1 MenuCommand = $08
|
||
|
|
000000r 1
|
||
|
|
000000r 1 InputString = $fd6a
|
||
|
|
000000r 1 StringBuffer = $0200
|
||
|
|
000000r 1 PrintChar = $fded
|
||
|
|
000000r 1 Keyboard = $c000
|
||
|
|
000000r 1 ClearKeyboard = $c010
|
||
|
|
000000r 1 Wait = $fca8
|
||
|
|
000000r 1 PromptChar = $33
|
||
|
|
000000r 1
|
||
|
|
000000r 1 ESC = $9b
|
||
|
|
000000r 1
|
||
|
|
000000r 1 .org $2000
|
||
|
|
002000 1 Start:
|
||
|
|
002000 1 A5 33 lda PromptChar
|
||
|
|
002002 1 8D 20 21 sta OldPromptChar
|
||
|
|
002005 1 A9 A4 lda #'$'|$80
|
||
|
|
002007 1 85 33 sta PromptChar
|
||
|
|
002009 1 A9 05 lda #ExecCommand
|
||
|
|
00200B 1 20 C9 20 jsr SendByte
|
||
|
|
00200E 1 A2 00 ldx #$00
|
||
|
|
002010 1 sendHelpCommand:
|
||
|
|
002010 1 BD 10 21 lda HelpCommand,x
|
||
|
|
002013 1 C9 00 cmp #$00
|
||
|
|
002015 1 F0 06 beq sendHelpCommandEnd
|
||
|
|
002017 1 20 C9 20 jsr SendByte
|
||
|
|
00201A 1 E8 inx
|
||
|
|
00201B 1 10 F3 bpl sendHelpCommand
|
||
|
|
00201D 1 sendHelpCommandEnd:
|
||
|
|
00201D 1 A9 00 lda #$00
|
||
|
|
00201F 1 20 C9 20 jsr SendByte
|
||
|
|
002022 1 2C 10 C0 bit ClearKeyboard
|
||
|
|
002025 1 20 90 20 jsr DumpOutput
|
||
|
|
002028 1
|
||
|
|
002028 1 Prompt:
|
||
|
|
002028 1 A9 05 lda #ExecCommand
|
||
|
|
00202A 1 20 C9 20 jsr SendByte
|
||
|
|
00202D 1 A2 00 ldx #$00
|
||
|
|
00202F 1 sendPromptCommand:
|
||
|
|
00202F 1 BD 17 21 lda PromptCommand,x
|
||
|
|
002032 1 C9 00 cmp #$00
|
||
|
|
002034 1 F0 06 beq sendPromptCommandEnd
|
||
|
|
002036 1 20 C9 20 jsr SendByte
|
||
|
|
002039 1 E8 inx
|
||
|
|
00203A 1 10 F3 bpl sendPromptCommand
|
||
|
|
00203C 1 sendPromptCommandEnd:
|
||
|
|
00203C 1 A9 00 lda #$00
|
||
|
|
00203E 1 20 C9 20 jsr SendByte
|
||
|
|
002041 1 2C 10 C0 bit ClearKeyboard
|
||
|
|
002044 1 20 90 20 jsr DumpOutput
|
||
|
|
002047 1
|
||
|
|
002047 1 ; get input
|
||
|
|
002047 1 20 6A FD jsr InputString
|
||
|
|
00204A 1 ; check for "exit"
|
||
|
|
00204A 1 AD 00 02 lda StringBuffer
|
||
|
|
00204D 1 C9 E5 cmp #'e'|$80
|
||
|
|
00204F 1 D0 1B bne Execute
|
||
|
|
002051 1 AD 01 02 lda StringBuffer+1
|
||
|
|
002054 1 C9 F8 cmp #'x'|$80
|
||
|
|
002056 1 D0 14 bne Execute
|
||
|
|
002058 1 AD 02 02 lda StringBuffer+2
|
||
|
|
00205B 1 C9 E9 cmp #'i'|$80
|
||
|
|
00205D 1 D0 0D bne Execute
|
||
|
|
00205F 1 AD 03 02 lda StringBuffer+3
|
||
|
|
002062 1 C9 F4 cmp #'t'|$80
|
||
|
|
002064 1 D0 06 bne Execute
|
||
|
|
002066 1 AD 20 21 lda OldPromptChar
|
||
|
|
002069 1 85 33 sta PromptChar
|
||
|
|
00206B 1 60 rts
|
||
|
|
00206C 1 Execute:
|
||
|
|
00206C 1 2C 10 C0 bit ClearKeyboard
|
||
|
|
00206F 1 A9 05 lda #ExecCommand
|
||
|
|
002071 1 20 C9 20 jsr SendByte
|
||
|
|
002074 1 A0 00 ldy #$00
|
||
|
|
002076 1 sendInput:
|
||
|
|
002076 1 B9 00 02 lda $0200,y
|
||
|
|
002079 1 C9 8D cmp #$8d
|
||
|
|
00207B 1 F0 08 beq sendNullTerminator
|
||
|
|
00207D 1 29 7F and #$7f
|
||
|
|
00207F 1 20 C9 20 jsr SendByte
|
||
|
|
002082 1 C8 iny
|
||
|
|
002083 1 D0 F1 bne sendInput
|
||
|
|
002085 1 sendNullTerminator:
|
||
|
|
002085 1 A9 00 lda #$00
|
||
|
|
002087 1 20 C9 20 jsr SendByte
|
||
|
|
00208A 1 20 90 20 jsr DumpOutput
|
||
|
|
00208D 1 4C 28 20 jmp Prompt
|
||
|
|
002090 1
|
||
|
|
002090 1 DumpOutput:
|
||
|
|
002090 1 20 E7 20 jsr GetByte
|
||
|
|
002093 1 B0 0B bcs skipOutput
|
||
|
|
002095 1 C9 00 cmp #$00
|
||
|
|
002097 1 F0 1A beq endOutput
|
||
|
|
002099 1 C9 9B cmp #ESC
|
||
|
|
00209B 1 F0 17 beq escapeSequence
|
||
|
|
00209D 1 20 ED FD jsr PrintChar
|
||
|
|
0020A0 1 skipOutput:
|
||
|
|
0020A0 1 2C 00 C0 bit Keyboard ;check for keypress
|
||
|
|
0020A3 1 10 EB bpl DumpOutput ;keep dumping output if no keypress
|
||
|
|
0020A5 1 AD 00 C0 lda Keyboard ;send keypress to RPi
|
||
|
|
0020A8 1 ;jsr PrintChar
|
||
|
|
0020A8 1 29 7F and #$7f
|
||
|
|
0020AA 1 20 C9 20 jsr SendByte
|
||
|
|
0020AD 1 2C 10 C0 bit ClearKeyboard
|
||
|
|
0020B0 1 18 clc
|
||
|
|
0020B1 1 90 DD bcc DumpOutput
|
||
|
|
0020B3 1 endOutput:
|
||
|
|
0020B3 1 60 rts
|
||
|
|
0020B4 1 escapeSequence:
|
||
|
|
0020B4 1 20 BA 20 jsr ParseEscape
|
||
|
|
0020B7 1 18 clc
|
||
|
|
0020B8 1 90 D6 bcc DumpOutput
|
||
|
|
0020BA 1
|
||
|
|
0020BA 1 ParseEscape:
|
||
|
|
0020BA 1 20 E7 20 jsr GetByte ; expect first byte after ESC to be '['
|
||
|
|
0020BD 1 C9 DB cmp #'['|$80
|
||
|
|
0020BF 1 F0 07 beq endParse
|
||
|
|
0020C1 1 checkLetter:
|
||
|
|
0020C1 1 20 E7 20 jsr GetByte ; loop until there is a letter
|
||
|
|
0020C4 1 C9 C1 cmp #$C1
|
||
|
|
0020C6 1 90 F9 bcc checkLetter
|
||
|
|
0020C8 1 endParse:
|
||
|
|
0020C8 1 60 rts
|
||
|
|
0020C9 1
|
||
|
|
0020C9 1 SendByte:
|
||
|
|
0020C9 1 48 pha
|
||
|
|
0020CA 1 waitWrite:
|
||
|
|
0020CA 1 AD FB C0 lda InputFlags
|
||
|
|
0020CD 1 2A rol
|
||
|
|
0020CE 1 2A rol
|
||
|
|
0020CF 1 B0 F9 bcs waitWrite
|
||
|
|
0020D1 1 68 pla
|
||
|
|
0020D2 1 8D FD C0 sta OutputByte
|
||
|
|
0020D5 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
|
||
|
|
0020D7 1 8D F7 C0 sta OutputFlags
|
||
|
|
0020DA 1 finishWrite:
|
||
|
|
0020DA 1 AD FB C0 lda InputFlags
|
||
|
|
0020DD 1 2A rol
|
||
|
|
0020DE 1 2A rol
|
||
|
|
0020DF 1 90 F9 bcc finishWrite
|
||
|
|
0020E1 1 A9 1F lda #$1f
|
||
|
|
0020E3 1 8D F7 C0 sta OutputFlags
|
||
|
|
0020E6 1 60 rts
|
||
|
|
0020E7 1
|
||
|
|
0020E7 1 GetByte:
|
||
|
|
0020E7 1 A9 1D lda #$1d ;set read flag low
|
||
|
|
0020E9 1 8D F7 C0 sta OutputFlags
|
||
|
|
0020EC 1 waitRead:
|
||
|
|
0020EC 1 AD FB C0 lda InputFlags
|
||
|
|
0020EF 1 2A rol
|
||
|
|
0020F0 1 90 0C bcc readByte
|
||
|
|
0020F2 1 2C 00 C0 bit Keyboard ;keypress will abort waiting to read
|
||
|
|
0020F5 1 10 F5 bpl waitRead
|
||
|
|
0020F7 1 A9 1F lda #$1f ;set all flags high and exit
|
||
|
|
0020F9 1 8D F7 C0 sta OutputFlags
|
||
|
|
0020FC 1 38 sec ;failure
|
||
|
|
0020FD 1 60 rts
|
||
|
|
0020FE 1 readByte:
|
||
|
|
0020FE 1 AD FE C0 lda InputByte
|
||
|
|
002101 1 48 pha
|
||
|
|
002102 1 A9 1F lda #$1f ;set all flags high
|
||
|
|
002104 1 8D F7 C0 sta OutputFlags
|
||
|
|
002107 1 finishRead:
|
||
|
|
002107 1 AD FB C0 lda InputFlags
|
||
|
|
00210A 1 2A rol
|
||
|
|
00210B 1 90 FA bcc finishRead
|
||
|
|
00210D 1 68 pla
|
||
|
|
00210E 1 18 clc ;success
|
||
|
|
00210F 1 end:
|
||
|
|
00210F 1 60 rts
|
||
|
|
002110 1
|
||
|
|
002110 1 HelpCommand:
|
||
|
|
002110 1 61 32 68 65 .byte "a2help",$00
|
||
|
|
002114 1 6C 70 00
|
||
|
|
002117 1 PromptCommand:
|
||
|
|
002117 1 61 32 70 72 .byte "a2prompt",$00
|
||
|
|
00211B 1 6F 6D 70 74
|
||
|
|
00211F 1 00
|
||
|
|
002120 1 OldPromptChar:
|
||
|
|
002120 1 5D .byte "]"
|
||
|
|
002121 1
|