Apple-2-HW
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Apple2-IO-RPi
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Enable 80 columns for command line

This commit is contained in:
Terence Boldt 2021-03-28 13:48:45 -04:00
parent 590575de77
commit d74c8452f1
4 changed files with 84 additions and 94 deletions
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11
Apple2/CommandFirmware.asm
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@ -46,6 +46,7 @@ DriverEntry:
sta OutputFlags
Start:
jsr $c300 ;enable 80 columns
lda $33
pha
lda #$a4
@ -53,17 +54,11 @@ Start:
GetCommand:
jsr $fd67
lda $0200
cmp #$8d ;stop when return found
beq ExitApp
cmp #$8d ;skip when return found
beq GetCommand
jsr DumpOutput
clc
bcc GetCommand
ExitApp:
pla
sta $33
lda #$00
sty $34
rts
DumpOutput:
lda #$05 ;send command 5 = exec

167
Apple2/CommandFirmware.lst
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@ -50,92 +50,87 @@ Current file: CommandFirmware.asm
00C516 1 8D D7 C0 sta OutputFlags
00C519 1
00C519 1 Start:
00C519 1 A5 33 lda $33
00C51B 1 48 pha
00C51C 1 A9 A4 lda #$a4
00C51E 1 85 33 sta $33
00C520 1 GetCommand:
00C520 1 20 67 FD jsr $fd67
00C523 1 AD 00 02 lda $0200
00C526 1 C9 8D cmp #$8d ;stop when return found
00C528 1 F0 06 beq ExitApp
00C52A 1 20 38 C5 jsr DumpOutput
00C52D 1 18 clc
00C52E 1 90 F0 bcc GetCommand
00C530 1 ExitApp:
00C530 1 68 pla
00C531 1 85 33 sta $33
00C533 1 A9 00 lda #$00
00C535 1 84 34 sty $34
00C537 1 60 rts
00C538 1
00C538 1 DumpOutput:
00C538 1 A9 05 lda #$05 ;send command 5 = exec
00C53A 1 20 61 C5 jsr SendByte
00C53D 1 A0 00 ldy #$00
00C53F 1 getInput:
00C53F 1 B9 00 02 lda $0200,y
00C542 1 C9 8D cmp #$8d
00C544 1 F0 08 beq sendNullTerminator
00C546 1 29 7F and #$7f
00C548 1 20 61 C5 jsr SendByte
00C54B 1 C8 iny
00C54C 1 D0 F1 bne getInput
00C54E 1 sendNullTerminator:
00C54E 1 A9 00 lda #$00
00C550 1 20 61 C5 jsr SendByte
00C553 1 getOutput:
00C553 1 20 7F C5 jsr GetByte
00C556 1 C9 00 cmp #$00
00C558 1 F0 06 beq endOutput
00C55A 1 20 ED FD jsr $fded
00C55D 1 18 clc
00C55E 1 90 F3 bcc getOutput
00C560 1 endOutput:
00C560 1 60 rts
00C561 1
00C561 1 SendByte:
00C561 1 48 pha
00C562 1 waitWrite:
00C562 1 AD DB C0 lda InputFlags
00C565 1 2A rol
00C566 1 2A rol
00C567 1 B0 F9 bcs waitWrite
00C569 1 68 pla
00C56A 1 8D DD C0 sta OutputByte
00C56D 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
00C56F 1 8D D7 C0 sta OutputFlags
00C572 1 finishWrite:
00C572 1 AD DB C0 lda InputFlags
00C575 1 2A rol
00C576 1 2A rol
00C577 1 90 F9 bcc finishWrite
00C579 1 A9 1F lda #$1f
00C57B 1 8D D7 C0 sta OutputFlags
00C57E 1 60 rts
00C57F 1
00C57F 1 GetByte:
00C57F 1 A9 1D lda #$1d ;set read flag low
00C581 1 8D D7 C0 sta OutputFlags
00C584 1 waitRead:
00C584 1 AD DB C0 lda InputFlags
00C587 1 2A rol
00C588 1 B0 FA bcs waitRead
00C58A 1 AD DE C0 lda InputByte
00C58D 1 48 pha
00C58E 1 A9 1F lda #$1f ;set all flags high
00C590 1 8D D7 C0 sta OutputFlags
00C593 1 finishRead:
00C593 1 AD DB C0 lda InputFlags
00C596 1 2A rol
00C597 1 90 FA bcc finishRead
00C599 1 68 pla
00C59A 1 end:
00C59A 1 60 rts
00C59B 1
00C59B 1 00 00 00 00 .repeat 251-<end
00C59F 1 00 00 00 00
00C5A3 1 00 00 00 00
00C519 1 20 00 C3 jsr $c300 ;enable 80 columns
00C51C 1 A5 33 lda $33
00C51E 1 48 pha
00C51F 1 A9 A4 lda #$a4
00C521 1 85 33 sta $33
00C523 1 GetCommand:
00C523 1 20 67 FD jsr $fd67
00C526 1 AD 00 02 lda $0200
00C529 1 C9 8D cmp #$8d ;skip when return found
00C52B 1 F0 F6 beq GetCommand
00C52D 1 20 33 C5 jsr DumpOutput
00C530 1 18 clc
00C531 1 90 F0 bcc GetCommand
00C533 1
00C533 1 DumpOutput:
00C533 1 A9 05 lda #$05 ;send command 5 = exec
00C535 1 20 5C C5 jsr SendByte
00C538 1 A0 00 ldy #$00
00C53A 1 getInput:
00C53A 1 B9 00 02 lda $0200,y
00C53D 1 C9 8D cmp #$8d
00C53F 1 F0 08 beq sendNullTerminator
00C541 1 29 7F and #$7f
00C543 1 20 5C C5 jsr SendByte
00C546 1 C8 iny
00C547 1 D0 F1 bne getInput
00C549 1 sendNullTerminator:
00C549 1 A9 00 lda #$00
00C54B 1 20 5C C5 jsr SendByte
00C54E 1 getOutput:
00C54E 1 20 7A C5 jsr GetByte
00C551 1 C9 00 cmp #$00
00C553 1 F0 06 beq endOutput
00C555 1 20 ED FD jsr $fded
00C558 1 18 clc
00C559 1 90 F3 bcc getOutput
00C55B 1 endOutput:
00C55B 1 60 rts
00C55C 1
00C55C 1 SendByte:
00C55C 1 48 pha
00C55D 1 waitWrite:
00C55D 1 AD DB C0 lda InputFlags
00C560 1 2A rol
00C561 1 2A rol
00C562 1 B0 F9 bcs waitWrite
00C564 1 68 pla
00C565 1 8D DD C0 sta OutputByte
00C568 1 A9 1E lda #$1e ; set bit 0 low to indicate write started
00C56A 1 8D D7 C0 sta OutputFlags
00C56D 1 finishWrite:
00C56D 1 AD DB C0 lda InputFlags
00C570 1 2A rol
00C571 1 2A rol
00C572 1 90 F9 bcc finishWrite
00C574 1 A9 1F lda #$1f
00C576 1 8D D7 C0 sta OutputFlags
00C579 1 60 rts
00C57A 1
00C57A 1 GetByte:
00C57A 1 A9 1D lda #$1d ;set read flag low
00C57C 1 8D D7 C0 sta OutputFlags
00C57F 1 waitRead:
00C57F 1 AD DB C0 lda InputFlags
00C582 1 2A rol
00C583 1 B0 FA bcs waitRead
00C585 1 AD DE C0 lda InputByte
00C588 1 48 pha
00C589 1 A9 1F lda #$1f ;set all flags high
00C58B 1 8D D7 C0 sta OutputFlags
00C58E 1 finishRead:
00C58E 1 AD DB C0 lda InputFlags
00C591 1 2A rol
00C592 1 90 FA bcc finishRead
00C594 1 68 pla
00C595 1 end:
00C595 1 60 rts
00C596 1
00C596 1 00 00 00 00 .repeat 251-<end
00C59A 1 00 00 00 00
00C59E 1 00 00 00 00
00C5FC 1 .byte 0
00C5FC 1 .endrepeat
00C5FC 1 00 00 .byte 0,0 ;0000 blocks = check status

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Apple2/Firmware_27256_EPROM.bin
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Apple2/Firmware_AT28C64B_EEPROM.bin
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