294 lines
11 KiB
Plaintext
294 lines
11 KiB
Plaintext
ca65 V2.18 - Debian 2.19-1
|
|
Main file : Shell.asm
|
|
Current file: Shell.asm
|
|
|
|
000000r 1 ; Copyright Terence J. Boldt (c)2021-2024
|
|
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 SHELL
|
|
000000r 1 ; application that runs on the Apple II to talk
|
|
000000r 1 ; to the Raspberry Pi
|
|
000000r 1
|
|
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 InputByte = $c08e
|
|
000000r 1 OutputByte = $c08d
|
|
000000r 1 InputFlags = $c08b
|
|
000000r 1 OutputFlags = $c087
|
|
000000r 1
|
|
000000r 1 ResetCommand = $00
|
|
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 ShellCommand = $09
|
|
000000r 1
|
|
000000r 1 InputString = $fd6a
|
|
000000r 1 StringBuffer = $0200
|
|
000000r 1 PrintChar = $fded
|
|
000000r 1 Keyboard = $c000
|
|
000000r 1 ClearKeyboard = $c010
|
|
000000r 1 Home = $fc58
|
|
000000r 1 Wait = $fca8
|
|
000000r 1 PromptChar = $33
|
|
000000r 1 Read80Col = $c01f
|
|
000000r 1 TextPage1 = $c054
|
|
000000r 1 TextPage2 = $c055
|
|
000000r 1
|
|
000000r 1 htab = $24
|
|
000000r 1 vtab = $25
|
|
000000r 1 BasL = $28
|
|
000000r 1 htab80 = $057b
|
|
000000r 1 BasCalc = $fbc1
|
|
000000r 1
|
|
000000r 1 LastChar = $06
|
|
000000r 1 SlotL = $fe
|
|
000000r 1 SlotH = $ff
|
|
000000r 1 ESC = $9b
|
|
000000r 1
|
|
000000r 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 Init
|
|
00202D 1 nextSlot:
|
|
00202D 1 CA dex
|
|
00202E 1 D0 D2 bne DetectSlot
|
|
002030 1 60 rts
|
|
002031 1
|
|
002031 1 Init:
|
|
002031 1 A9 8D lda #$8d
|
|
002033 1 20 00 C3 jsr $c300 ; force 80 columns
|
|
002036 1
|
|
002036 1 A0 00 ldy #$00
|
|
002038 1 PrintString:
|
|
002038 1 B9 71 21 lda Text,y
|
|
00203B 1 F0 08 beq Start
|
|
00203D 1 09 80 ora #$80
|
|
00203F 1 20 ED FD jsr PrintChar
|
|
002042 1 C8 iny
|
|
002043 1 D0 F3 bne PrintString
|
|
002045 1
|
|
002045 1 Start:
|
|
002045 1 A5 06 lda LastChar
|
|
002047 1 48 pha
|
|
002048 1 2C 10 C0 bit ClearKeyboard
|
|
00204B 1 A9 00 lda #ResetCommand
|
|
00204D 1 20 CC 20 jsr SendByte
|
|
002050 1 A9 09 lda #ShellCommand
|
|
002052 1 20 CC 20 jsr SendByte
|
|
002055 1 20 5C 20 jsr DumpOutput
|
|
002058 1 68 pla
|
|
002059 1 85 06 sta LastChar
|
|
00205B 1 60 rts
|
|
00205C 1
|
|
00205C 1 DumpOutput:
|
|
00205C 1 20 EA 20 jsr GetByte
|
|
00205F 1 C9 00 cmp #$00
|
|
002061 1 F0 26 beq endOutput
|
|
002063 1 48 pha
|
|
002064 1 20 5C 21 jsr ClearCursor
|
|
002067 1 68 pla
|
|
002068 1 C9 48 cmp #'H'
|
|
00206A 1 F0 27 beq setColumn
|
|
00206C 1 C9 56 cmp #'V'
|
|
00206E 1 F0 31 beq setRow
|
|
002070 1 C9 43 cmp #'C'
|
|
002072 1 F0 16 beq clearScreen
|
|
002074 1 C9 54 cmp #'T'
|
|
002076 1 F0 37 beq setTop
|
|
002078 1 C9 42 cmp #'B'
|
|
00207A 1 F0 3B beq setBottom
|
|
00207C 1 C9 55 cmp #'U'
|
|
00207E 1 F0 3F beq moveUp
|
|
002080 1 20 ED FD jsr PrintChar
|
|
002083 1 20 2B 21 jsr SetCursor
|
|
002086 1 4C 5C 20 jmp DumpOutput
|
|
002089 1 endOutput:
|
|
002089 1 60 rts
|
|
00208A 1 clearScreen:
|
|
00208A 1 20 58 FC jsr Home
|
|
00208D 1 20 2B 21 jsr SetCursor
|
|
002090 1 4C 5C 20 jmp DumpOutput
|
|
002093 1 setColumn:
|
|
002093 1 20 EA 20 jsr GetByte
|
|
002096 1 85 24 sta htab
|
|
002098 1 8D 7B 05 sta htab80
|
|
00209B 1 20 2B 21 jsr SetCursor
|
|
00209E 1 4C 5C 20 jmp DumpOutput
|
|
0020A1 1 setRow:
|
|
0020A1 1 20 EA 20 jsr GetByte
|
|
0020A4 1 85 25 sta vtab
|
|
0020A6 1 20 C1 FB jsr BasCalc
|
|
0020A9 1 20 2B 21 jsr SetCursor
|
|
0020AC 1 4C 5C 20 jmp DumpOutput
|
|
0020AF 1 setTop:
|
|
0020AF 1 20 EA 20 jsr GetByte
|
|
0020B2 1 85 22 sta $22
|
|
0020B4 1 4C 5C 20 jmp DumpOutput
|
|
0020B7 1 setBottom:
|
|
0020B7 1 20 EA 20 jsr GetByte
|
|
0020BA 1 85 23 sta $23
|
|
0020BC 1 4C 5C 20 jmp DumpOutput
|
|
0020BF 1 moveUp:
|
|
0020BF 1 C6 25 dec vtab
|
|
0020C1 1 A5 25 lda vtab
|
|
0020C3 1 20 C1 FB jsr BasCalc
|
|
0020C6 1 20 2B 21 jsr SetCursor
|
|
0020C9 1 4C 5C 20 jmp DumpOutput
|
|
0020CC 1
|
|
0020CC 1 SendByte:
|
|
0020CC 1 48 pha
|
|
0020CD 1 waitWrite:
|
|
0020CD 1 BD 8B C0 lda InputFlags,x
|
|
0020D0 1 2A rol
|
|
0020D1 1 2A rol
|
|
0020D2 1 B0 F9 bcs waitWrite
|
|
0020D4 1 68 pla
|
|
0020D5 1 9D 8D C0 sta OutputByte,x
|
|
0020D8 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
|
|
0020DA 1 9D 87 C0 sta OutputFlags,x
|
|
0020DD 1 finishWrite:
|
|
0020DD 1 BD 8B C0 lda InputFlags,x
|
|
0020E0 1 2A rol
|
|
0020E1 1 2A rol
|
|
0020E2 1 90 F9 bcc finishWrite
|
|
0020E4 1 A9 1F lda #$1f
|
|
0020E6 1 9D 87 C0 sta OutputFlags,x
|
|
0020E9 1 60 rts
|
|
0020EA 1
|
|
0020EA 1 GetByte:
|
|
0020EA 1 A9 1D lda #$1d ;set read flag low
|
|
0020EC 1 9D 87 C0 sta OutputFlags,x
|
|
0020EF 1 waitRead:
|
|
0020EF 1 BD 8B C0 lda InputFlags,x
|
|
0020F2 1 2A rol
|
|
0020F3 1 90 24 bcc readByte
|
|
0020F5 1 2C 00 C0 bit Keyboard ;keypress will abort waiting to read
|
|
0020F8 1 10 F5 bpl waitRead
|
|
0020FA 1 keyPressed:
|
|
0020FA 1 AD 00 C0 lda Keyboard ;send keypress to RPi
|
|
0020FD 1 29 7F and #$7f
|
|
0020FF 1 9D 8D C0 sta OutputByte,x
|
|
002102 1 2C 10 C0 bit ClearKeyboard
|
|
002105 1 A9 1C lda #$1c ;set write flag low too
|
|
002107 1 9D 87 C0 sta OutputFlags,x
|
|
00210A 1 finishKeyPress:
|
|
00210A 1 BD 8B C0 lda InputFlags,x
|
|
00210D 1 2A rol
|
|
00210E 1 2A rol
|
|
00210F 1 90 F9 bcc finishKeyPress
|
|
002111 1 A9 1D lda #$1d ;set flags back for reading
|
|
002113 1 9D 87 C0 sta OutputFlags,x
|
|
002116 1 4C EF 20 jmp waitRead
|
|
002119 1 readByte:
|
|
002119 1 BD 8E C0 lda InputByte,x
|
|
00211C 1 48 pha
|
|
00211D 1 A9 1F lda #$1f ;set all flags high
|
|
00211F 1 9D 87 C0 sta OutputFlags,x
|
|
002122 1 finishRead:
|
|
002122 1 BD 8B C0 lda InputFlags,x
|
|
002125 1 2A rol
|
|
002126 1 90 FA bcc finishRead
|
|
002128 1 68 pla
|
|
002129 1 18 clc ;success
|
|
00212A 1 end:
|
|
00212A 1 60 rts
|
|
00212B 1
|
|
00212B 1 SetCursor:
|
|
00212B 1 AD 7B 05 lda htab80 ;get horizontal location / 2
|
|
00212E 1 4A lsr
|
|
00212F 1 A8 tay
|
|
002130 1 AD 55 C0 lda TextPage2
|
|
002133 1 90 03 bcc setChar
|
|
002135 1 AD 54 C0 lda TextPage1
|
|
002138 1 setChar:
|
|
002138 1 B1 28 lda (BasL),y
|
|
00213A 1 85 06 sta LastChar ; save so ClearCursor will pick it up
|
|
00213C 1 C9 E0 cmp #$e0
|
|
00213E 1 10 0C bpl lowerCase
|
|
002140 1 C9 C0 cmp #$c0
|
|
002142 1 10 0D bpl upperCase
|
|
002144 1 C9 A0 cmp #$a0
|
|
002146 1 10 04 bpl symbol
|
|
002148 1 C9 80 cmp #$80
|
|
00214A 1 10 0A bpl noop
|
|
00214C 1 symbol:
|
|
00214C 1 lowerCase:
|
|
00214C 1 invert:
|
|
00214C 1 49 80 eor #$80
|
|
00214E 1 4C 56 21 jmp storeChar
|
|
002151 1 upperCase:
|
|
002151 1 29 1F and #$1f
|
|
002153 1 4C 56 21 jmp storeChar
|
|
002156 1 noop:
|
|
002156 1 storeChar:
|
|
002156 1 91 28 sta (BasL),y
|
|
002158 1 AD 54 C0 lda TextPage1
|
|
00215B 1 60 rts
|
|
00215C 1
|
|
00215C 1 ClearCursor:
|
|
00215C 1 AD 7B 05 lda htab80 ;get horizontal location / 2
|
|
00215F 1 4A lsr
|
|
002160 1 A8 tay
|
|
002161 1 AD 55 C0 lda TextPage2
|
|
002164 1 90 03 bcc restoreChar
|
|
002166 1 AD 54 C0 lda TextPage1
|
|
002169 1 restoreChar:
|
|
002169 1 A5 06 lda LastChar
|
|
00216B 1 91 28 sta (BasL),y
|
|
00216D 1 AD 54 C0 lda TextPage1
|
|
002170 1 60 rts
|
|
002171 1
|
|
002171 1 Text:
|
|
002171 1 41 70 70 6C .byte "Apple2-IO-RPi Shell Version 000E",$8d
|
|
002175 1 65 32 2D 49
|
|
002179 1 4F 2D 52 50
|
|
002192 1 28 63 29 32 .byte "(c)2020-2024 Terence J. Boldt",$8d
|
|
002196 1 30 32 30 2D
|
|
00219A 1 32 30 32 34
|
|
0021B0 1 8D .byte $8d
|
|
0021B1 1 00 .byte $00
|
|
0021B1 1
|