Apple-2-HW/Apple2-IO-RPi
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Add slot detection for Shell

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This commit is contained in:
Terence Boldt 2021-12-31 13:09:53 -05:00
parent 91fa35bf0f
commit 23b7a69acb
3 changed files with 264 additions and 200 deletions
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70
Apple2/Shell.asm
View File

@ -11,13 +11,10 @@ IOError = $27
NoDevice = $28
WriteProtect = $2B
; hard code slot to 7 for now, will make it auto-detect later
SLOT = 7
InputByte = $c08e+SLOT*$10
OutputByte = $c08d+SLOT*$10
InputFlags = $c08b+SLOT*$10
OutputFlags = $c087+SLOT*$10
InputByte = $c08e
OutputByte = $c08d
InputFlags = $c08b
OutputFlags = $c087
ResetCommand = $00
ReadBlockCommand = $01
@ -49,11 +46,46 @@ htab80 = $057b
BasCalc = $fbc1
LastChar = $06
SlotL = $fe
SlotH = $ff
ESC = $9b
.org $2000
ldx #$07 ; start at slot 7
DetectSlot:
ldy #$00
lda #$fc
sta SlotL
txa
ora #$c0
sta SlotH
lda (SlotL),y
bne nextSlot
iny
lda (SlotL),y
bne nextSlot
iny
lda (SlotL),y
cmp #$17
bne nextSlot
iny
lda (SlotL),y
cmp #$14
bne nextSlot
txa
asl
asl
asl
asl
tax
clc
bcc Start
nextSlot:
dex
bne DetectSlot
rts
Start:
lda #$8d
jsr $c300 ; force 80 columns
lda LastChar
pha
@ -134,46 +166,46 @@ moveUp:
SendByte:
pha
waitWrite:
lda InputFlags
lda InputFlags,x
rol
rol
bcs waitWrite
pla
sta OutputByte
sta OutputByte,x
lda #$1e ; set bit 0 low to indicate write started
sta OutputFlags
sta OutputFlags,x
finishWrite:
lda InputFlags
lda InputFlags,x
rol
rol
bcc finishWrite
lda #$1f
sta OutputFlags
sta OutputFlags,x
rts
GetByte:
bit Keyboard ; skip byte read if key pressed
bcc keyPressed
lda #$1d ;set read flag low
sta OutputFlags
sta OutputFlags,x
waitRead:
lda InputFlags
lda InputFlags,x
rol
bcc readByte
bit Keyboard ;keypress will abort waiting to read
bpl waitRead
keyPressed:
lda #$1f ;set all flags high and exit
sta OutputFlags
sta OutputFlags,x
sec ;failure
rts
readByte:
lda InputByte
lda InputByte,x
pha
lda #$1f ;set all flags high
sta OutputFlags
sta OutputFlags,x
finishRead:
lda InputFlags
lda InputFlags,x
rol
bcc finishRead
pla

BIN
Apple2/Shell.bin
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Binary file not shown.

394
Apple2/Shell.lst
View File

@ -15,13 +15,10 @@ Current file: Shell.asm
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 InputByte = $c08e
000000r 1 OutputByte = $c08d
000000r 1 InputFlags = $c08b
000000r 1 OutputFlags = $c087
000000r 1
000000r 1 ResetCommand = $00
000000r 1 ReadBlockCommand = $01
@ -53,180 +50,215 @@ Current file: Shell.asm
000000r 1 BasCalc = $fbc1
000000r 1
000000r 1 LastChar = $06
000000r 1
000000r 1 SlotL = $fe
000000r 1 SlotH = $ff
000000r 1 ESC = $9b
000000r 1
000000r 1 .org $2000
002000 1 Start:
002000 1 20 00 C3 jsr $c300 ; force 80 columns
002003 1 A5 06 lda LastChar
002005 1 48 pha
002006 1 2C 10 C0 bit ClearKeyboard
002009 1 A9 00 lda #ResetCommand
00200B 1 20 9F 20 jsr SendByte
00200E 1 A9 09 lda #ShellCommand
002010 1 20 9F 20 jsr SendByte
002013 1 20 1A 20 jsr DumpOutput
002016 1 68 pla
002017 1 85 06 sta LastChar
002019 1 60 rts
00201A 1
00201A 1 DumpOutput:
00201A 1 20 BD 20 jsr GetByte
00201D 1 B0 2A bcs checkInput
00201F 1 C9 00 cmp #$00
002021 1 F0 39 beq endOutput
002023 1 48 pha
002024 1 20 1C 21 jsr ClearCursor
002027 1 68 pla
002028 1 C9 48 cmp #'H'
00202A 1 F0 3A beq setColumn
00202C 1 C9 56 cmp #'V'
00202E 1 F0 44 beq setRow
002030 1 C9 43 cmp #'C'
002032 1 F0 29 beq clearScreen
002034 1 C9 54 cmp #'T'
002036 1 F0 4A beq setTop
002038 1 C9 42 cmp #'B'
00203A 1 F0 4E beq setBottom
00203C 1 C9 55 cmp #'U'
00203E 1 F0 52 beq moveUp
002040 1 20 ED FD jsr PrintChar
002043 1 20 EB 20 jsr SetCursor
002046 1 4C 1A 20 jmp DumpOutput
002049 1 checkInput:
002049 1 2C 00 C0 bit Keyboard ;check for keypress
00204C 1 10 CC bpl DumpOutput ;keep dumping output if no keypress
00204E 1 AD 00 C0 lda Keyboard ;send keypress to RPi
002051 1 29 7F and #$7f
002053 1 20 9F 20 jsr SendByte
002056 1 2C 10 C0 bit ClearKeyboard
002059 1 4C 1A 20 jmp DumpOutput
00205C 1 endOutput:
00205C 1 60 rts
00205D 1 clearScreen:
00205D 1 20 58 FC jsr Home
002060 1 20 EB 20 jsr SetCursor
002063 1 4C 1A 20 jmp DumpOutput
002066 1 setColumn:
002066 1 20 BD 20 jsr GetByte
002069 1 85 24 sta htab
00206B 1 8D 7B 05 sta htab80
00206E 1 20 EB 20 jsr SetCursor
002071 1 4C 1A 20 jmp DumpOutput
002074 1 setRow:
002074 1 20 BD 20 jsr GetByte
002077 1 85 25 sta vtab
002079 1 20 C1 FB jsr BasCalc
00207C 1 20 EB 20 jsr SetCursor
00207F 1 4C 1A 20 jmp DumpOutput
002082 1 setTop:
002082 1 20 BD 20 jsr GetByte
002085 1 85 22 sta $22
002087 1 4C 1A 20 jmp DumpOutput
00208A 1 setBottom:
00208A 1 20 BD 20 jsr GetByte
00208D 1 85 23 sta $23
00208F 1 4C 1A 20 jmp DumpOutput
002092 1 moveUp:
002092 1 C6 25 dec vtab
002094 1 A5 25 lda vtab
002096 1 20 C1 FB jsr BasCalc
002099 1 20 EB 20 jsr SetCursor
00209C 1 4C 1A 20 jmp DumpOutput
00209F 1
00209F 1 SendByte:
00209F 1 48 pha
0020A0 1 waitWrite:
0020A0 1 AD FB C0 lda InputFlags
0020A3 1 2A rol
0020A4 1 2A rol
0020A5 1 B0 F9 bcs waitWrite
0020A7 1 68 pla
0020A8 1 8D FD C0 sta OutputByte
0020AB 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
0020AD 1 8D F7 C0 sta OutputFlags
0020B0 1 finishWrite:
0020B0 1 AD FB C0 lda InputFlags
0020B3 1 2A rol
0020B4 1 2A rol
0020B5 1 90 F9 bcc finishWrite
0020B7 1 A9 1F lda #$1f
0020B9 1 8D F7 C0 sta OutputFlags
0020BC 1 60 rts
0020BD 1
0020BD 1 GetByte:
0020BD 1 2C 00 C0 bit Keyboard ; skip byte read if key pressed
0020C0 1 90 10 bcc keyPressed
0020C2 1 A9 1D lda #$1d ;set read flag low
0020C4 1 8D F7 C0 sta OutputFlags
0020C7 1 waitRead:
0020C7 1 AD FB C0 lda InputFlags
0020CA 1 2A rol
0020CB 1 90 0C bcc readByte
0020CD 1 2C 00 C0 bit Keyboard ;keypress will abort waiting to read
0020D0 1 10 F5 bpl waitRead
0020D2 1 keyPressed:
0020D2 1 A9 1F lda #$1f ;set all flags high and exit
0020D4 1 8D F7 C0 sta OutputFlags
0020D7 1 38 sec ;failure
0020D8 1 60 rts
0020D9 1 readByte:
0020D9 1 AD FE C0 lda InputByte
0020DC 1 48 pha
0020DD 1 A9 1F lda #$1f ;set all flags high
0020DF 1 8D F7 C0 sta OutputFlags
0020E2 1 finishRead:
0020E2 1 AD FB C0 lda InputFlags
0020E5 1 2A rol
0020E6 1 90 FA bcc finishRead
0020E8 1 68 pla
0020E9 1 18 clc ;success
0020EA 1 end:
0020EA 1 60 rts
0020EB 1
0020EB 1 SetCursor:
0020EB 1 AD 7B 05 lda htab80 ;get horizontal location / 2
0020EE 1 4A lsr
0020EF 1 A8 tay
0020F0 1 AD 55 C0 lda TextPage2
0020F3 1 90 03 bcc setChar
0020F5 1 AD 54 C0 lda TextPage1
0020F8 1 setChar:
0020F8 1 B1 28 lda (BasL),y
0020FA 1 85 06 sta LastChar ; save so ClearCursor will pick it up
0020FC 1 C9 E0 cmp #$e0
0020FE 1 10 0C bpl lowerCase
002100 1 C9 C0 cmp #$c0
002102 1 10 0D bpl upperCase
002104 1 C9 A0 cmp #$a0
002106 1 10 04 bpl symbol
002108 1 C9 80 cmp #$80
00210A 1 10 0A bpl noop
00210C 1 symbol:
00210C 1 lowerCase:
00210C 1 invert:
00210C 1 49 80 eor #$80
00210E 1 4C 16 21 jmp storeChar
002111 1 upperCase:
002111 1 29 1F and #$1f
002113 1 4C 16 21 jmp storeChar
002116 1 noop:
002116 1 storeChar:
002116 1 91 28 sta (BasL),y
002118 1 AD 54 C0 lda TextPage1
00211B 1 60 rts
00211C 1
00211C 1 ClearCursor:
00211C 1 AD 7B 05 lda htab80 ;get horizontal location / 2
00211F 1 4A lsr
002120 1 A8 tay
002121 1 AD 55 C0 lda TextPage2
002124 1 90 03 bcc restoreChar
002126 1 AD 54 C0 lda TextPage1
002129 1 restoreChar:
002129 1 A5 06 lda LastChar
00212B 1 91 28 sta (BasL),y
00212D 1 AD 54 C0 lda TextPage1
002130 1 60 rts
002130 1
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 A9 8D lda #$8d
002033 1 20 00 C3 jsr $c300 ; force 80 columns
002036 1 A5 06 lda LastChar
002038 1 48 pha
002039 1 2C 10 C0 bit ClearKeyboard
00203C 1 A9 00 lda #ResetCommand
00203E 1 20 D2 20 jsr SendByte
002041 1 A9 09 lda #ShellCommand
002043 1 20 D2 20 jsr SendByte
002046 1 20 4D 20 jsr DumpOutput
002049 1 68 pla
00204A 1 85 06 sta LastChar
00204C 1 60 rts
00204D 1
00204D 1 DumpOutput:
00204D 1 20 F0 20 jsr GetByte
002050 1 B0 2A bcs checkInput
002052 1 C9 00 cmp #$00
002054 1 F0 39 beq endOutput
002056 1 48 pha
002057 1 20 4F 21 jsr ClearCursor
00205A 1 68 pla
00205B 1 C9 48 cmp #'H'
00205D 1 F0 3A beq setColumn
00205F 1 C9 56 cmp #'V'
002061 1 F0 44 beq setRow
002063 1 C9 43 cmp #'C'
002065 1 F0 29 beq clearScreen
002067 1 C9 54 cmp #'T'
002069 1 F0 4A beq setTop
00206B 1 C9 42 cmp #'B'
00206D 1 F0 4E beq setBottom
00206F 1 C9 55 cmp #'U'
002071 1 F0 52 beq moveUp
002073 1 20 ED FD jsr PrintChar
002076 1 20 1E 21 jsr SetCursor
002079 1 4C 4D 20 jmp DumpOutput
00207C 1 checkInput:
00207C 1 2C 00 C0 bit Keyboard ;check for keypress
00207F 1 10 CC bpl DumpOutput ;keep dumping output if no keypress
002081 1 AD 00 C0 lda Keyboard ;send keypress to RPi
002084 1 29 7F and #$7f
002086 1 20 D2 20 jsr SendByte
002089 1 2C 10 C0 bit ClearKeyboard
00208C 1 4C 4D 20 jmp DumpOutput
00208F 1 endOutput:
00208F 1 60 rts
002090 1 clearScreen:
002090 1 20 58 FC jsr Home
002093 1 20 1E 21 jsr SetCursor
002096 1 4C 4D 20 jmp DumpOutput
002099 1 setColumn:
002099 1 20 F0 20 jsr GetByte
00209C 1 85 24 sta htab
00209E 1 8D 7B 05 sta htab80
0020A1 1 20 1E 21 jsr SetCursor
0020A4 1 4C 4D 20 jmp DumpOutput
0020A7 1 setRow:
0020A7 1 20 F0 20 jsr GetByte
0020AA 1 85 25 sta vtab
0020AC 1 20 C1 FB jsr BasCalc
0020AF 1 20 1E 21 jsr SetCursor
0020B2 1 4C 4D 20 jmp DumpOutput
0020B5 1 setTop:
0020B5 1 20 F0 20 jsr GetByte
0020B8 1 85 22 sta $22
0020BA 1 4C 4D 20 jmp DumpOutput
0020BD 1 setBottom:
0020BD 1 20 F0 20 jsr GetByte
0020C0 1 85 23 sta $23
0020C2 1 4C 4D 20 jmp DumpOutput
0020C5 1 moveUp:
0020C5 1 C6 25 dec vtab
0020C7 1 A5 25 lda vtab
0020C9 1 20 C1 FB jsr BasCalc
0020CC 1 20 1E 21 jsr SetCursor
0020CF 1 4C 4D 20 jmp DumpOutput
0020D2 1
0020D2 1 SendByte:
0020D2 1 48 pha
0020D3 1 waitWrite:
0020D3 1 BD 8B C0 lda InputFlags,x
0020D6 1 2A rol
0020D7 1 2A rol
0020D8 1 B0 F9 bcs waitWrite
0020DA 1 68 pla
0020DB 1 9D 8D C0 sta OutputByte,x
0020DE 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
0020E0 1 9D 87 C0 sta OutputFlags,x
0020E3 1 finishWrite:
0020E3 1 BD 8B C0 lda InputFlags,x
0020E6 1 2A rol
0020E7 1 2A rol
0020E8 1 90 F9 bcc finishWrite
0020EA 1 A9 1F lda #$1f
0020EC 1 9D 87 C0 sta OutputFlags,x
0020EF 1 60 rts
0020F0 1
0020F0 1 GetByte:
0020F0 1 2C 00 C0 bit Keyboard ; skip byte read if key pressed
0020F3 1 90 10 bcc keyPressed
0020F5 1 A9 1D lda #$1d ;set read flag low
0020F7 1 9D 87 C0 sta OutputFlags,x
0020FA 1 waitRead:
0020FA 1 BD 8B C0 lda InputFlags,x
0020FD 1 2A rol
0020FE 1 90 0C bcc readByte
002100 1 2C 00 C0 bit Keyboard ;keypress will abort waiting to read
002103 1 10 F5 bpl waitRead
002105 1 keyPressed:
002105 1 A9 1F lda #$1f ;set all flags high and exit
002107 1 9D 87 C0 sta OutputFlags,x
00210A 1 38 sec ;failure
00210B 1 60 rts
00210C 1 readByte:
00210C 1 BD 8E C0 lda InputByte,x
00210F 1 48 pha
002110 1 A9 1F lda #$1f ;set all flags high
002112 1 9D 87 C0 sta OutputFlags,x
002115 1 finishRead:
002115 1 BD 8B C0 lda InputFlags,x
002118 1 2A rol
002119 1 90 FA bcc finishRead
00211B 1 68 pla
00211C 1 18 clc ;success
00211D 1 end:
00211D 1 60 rts
00211E 1
00211E 1 SetCursor:
00211E 1 AD 7B 05 lda htab80 ;get horizontal location / 2
002121 1 4A lsr
002122 1 A8 tay
002123 1 AD 55 C0 lda TextPage2
002126 1 90 03 bcc setChar
002128 1 AD 54 C0 lda TextPage1
00212B 1 setChar:
00212B 1 B1 28 lda (BasL),y
00212D 1 85 06 sta LastChar ; save so ClearCursor will pick it up
00212F 1 C9 E0 cmp #$e0
002131 1 10 0C bpl lowerCase
002133 1 C9 C0 cmp #$c0
002135 1 10 0D bpl upperCase
002137 1 C9 A0 cmp #$a0
002139 1 10 04 bpl symbol
00213B 1 C9 80 cmp #$80
00213D 1 10 0A bpl noop
00213F 1 symbol:
00213F 1 lowerCase:
00213F 1 invert:
00213F 1 49 80 eor #$80
002141 1 4C 49 21 jmp storeChar
002144 1 upperCase:
002144 1 29 1F and #$1f
002146 1 4C 49 21 jmp storeChar
002149 1 noop:
002149 1 storeChar:
002149 1 91 28 sta (BasL),y
00214B 1 AD 54 C0 lda TextPage1
00214E 1 60 rts
00214F 1
00214F 1 ClearCursor:
00214F 1 AD 7B 05 lda htab80 ;get horizontal location / 2
002152 1 4A lsr
002153 1 A8 tay
002154 1 AD 55 C0 lda TextPage2
002157 1 90 03 bcc restoreChar
002159 1 AD 54 C0 lda TextPage1
00215C 1 restoreChar:
00215C 1 A5 06 lda LastChar
00215E 1 91 28 sta (BasL),y
002160 1 AD 54 C0 lda TextPage1
002163 1 60 rts
002163 1