Apple2-IO-RPi/Apple2/MenuFirmware.lst

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2021-06-01 23:08:21 +00:00
ca65 V2.17 - Raspbian 2.17-1
2021-03-27 14:25:42 +00:00
Main file : MenuFirmware.asm
Current file: MenuFirmware.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 InputByte = $c08e+SLOT*$10
000000r 1 OutputByte = $c08d+SLOT*$10
000000r 1 InputFlags = $c08b+SLOT*$10
000000r 1 OutputFlags = $c087+SLOT*$10
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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
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000000r 1 MenuCommand = $08
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000000r 1
000000r 1 .org SLOT*$100 + $C000
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00C700 1 ;ID bytes for booting and drive detection
00C700 1 E0 20 cpx #$20 ;ID bytes for ProDOS and the
00C702 1 E0 00 cpx #$00 ; Apple Autostart ROM
00C704 1 E0 03 cpx #$03 ;
00C706 1
00C706 1 A2 70 ldx #SLOT*$10
00C708 1 86 2B stx $2b
00C70A 1 86 43 stx Unit
00C70C 1
00C70C 1 ;force EPROM to second page on boot
00C70C 1 A9 3F lda #$3f ;set all flags high and page 1 of EPROMi
00C70E 1 PageJump:
00C70E 1 8D F7 C0 sta OutputFlags
00C711 1 4C 19 C7 jmp Start
00C714 1
00C714 1 ;entry points for ProDOS
00C714 1 DriverEntry:
00C714 1 A9 0F lda #$0f ;set all flags high and page 0 of EPROM
00C716 1 8D F7 C0 sta OutputFlags
00C719 1 ;since the firmware page changes to 0, this falls through to the driver
00C719 1
00C719 1 Start:
00C719 1 A9 F0 lda #$f0 ;restore COUT after PR# called
00C71B 1 85 36 sta $36
00C71D 1 A9 FD lda #$fd
00C71F 1 85 37 sta $37
00C721 1 20 58 FC jsr $fc58 ;clear screen and show menu options
00C724 1 A0 00 ldy #$00
00C726 1 PrintString:
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00C726 1 B9 6A C7 lda Text,y
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00C729 1 F0 08 beq WaitForRPi
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00C72B 1 09 80 ora #$80
00C72D 1 20 ED FD jsr $fded
00C730 1 C8 iny
00C731 1 D0 F3 bne PrintString
00C733 1
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00C733 1 WaitForRPi:
00C733 1 AD FB C0 lda InputFlags
00C736 1 2A rol
00C737 1 B0 0D bcs OK
00C739 1 A9 FF lda #$ff
00C73B 1 20 A8 FC jsr $fca8
00C73E 1 A9 AE lda #$ae
00C740 1 20 ED FD jsr $fded
00C743 1 4C 33 C7 jmp WaitForRPi
00C746 1
00C746 1 OK:
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00C746 1 20 58 FC jsr $fc58 ;clear screen
00C749 1
00C749 1 A9 08 lda #MenuCommand ;request menu text from RPi
00C74B 1 20 AA C7 jsr SendByte
00C74E 1
00C74E 1 DumpOutput:
00C74E 1 20 C8 C7 jsr GetByte
00C751 1 C9 00 cmp #$00
00C753 1 F0 06 beq GetChar
00C755 1 20 ED FD jsr $fded
00C758 1 18 clc
00C759 1 90 F3 bcc DumpOutput
00C75B 1
00C75B 1 GetChar:
00C75B 1 20 0C FD jsr $fd0c
00C75E 1 38 sec ;subtract ascii "1" to get 0 - 3 from "1" to "4"
00C75F 1 E9 B1 sbc #$b1
00C761 1 0A asl ;put in top nibble as EPROM page
00C762 1 0A asl
00C763 1 0A asl
00C764 1 0A asl
00C765 1 09 0F ora #$0f ;set all flags high
00C767 1 4C 0E C7 jmp PageJump
00C76A 1
00C76A 1 Text:
00C76A 1
00C76A 1 41 70 70 6C .byte "Apple2-IO-RPi",$8d
00C76E 1 65 32 2D 49
00C772 1 4F 2D 52 50
00C776 1 69 8D
00C778 1 28 63 29 32 .byte "(c)2020-2021 Terence J. Boldt",$8d
00C77C 1 30 32 30 2D
00C780 1 32 30 32 31
00C784 1 20 54 65 72
00C788 1 65 6E 63 65
00C78C 1 20 4A 2E 20
00C790 1 42 6F 6C 64
00C794 1 74 8D
00C796 1 8D .byte $8d
00C797 1 57 61 69 74 .byte "Waiting for RPi...",$00
00C79B 1 69 6E 67 20
00C79F 1 66 6F 72 20
00C7A3 1 52 50 69 2E
00C7A7 1 2E 2E 00
00C7AA 1
00C7AA 1 SendByte:
00C7AA 1 48 pha
00C7AB 1 waitWrite:
00C7AB 1 AD FB C0 lda InputFlags
00C7AE 1 2A rol
00C7AF 1 2A rol
00C7B0 1 B0 F9 bcs waitWrite
00C7B2 1 68 pla
00C7B3 1 8D FD C0 sta OutputByte
00C7B6 1 A9 3E lda #$3e ; set bit 0 low to indicate write started
00C7B8 1 8D F7 C0 sta OutputFlags
00C7BB 1 finishWrite:
00C7BB 1 AD FB C0 lda InputFlags
00C7BE 1 2A rol
00C7BF 1 2A rol
00C7C0 1 90 F9 bcc finishWrite
00C7C2 1 A9 3F lda #$3f
00C7C4 1 8D F7 C0 sta OutputFlags
00C7C7 1 60 rts
00C7C8 1
00C7C8 1 GetByte:
00C7C8 1 A9 3D lda #$3d ;set read flag low
00C7CA 1 8D F7 C0 sta OutputFlags
00C7CD 1 waitRead:
00C7CD 1 AD FB C0 lda InputFlags
00C7D0 1 2A rol
00C7D1 1 B0 FA bcs waitRead
00C7D3 1 AD FE C0 lda InputByte
00C7D6 1 48 pha
00C7D7 1 A9 3F lda #$3f ;set all flags high
00C7D9 1 8D F7 C0 sta OutputFlags
00C7DC 1 finishRead:
00C7DC 1 AD FB C0 lda InputFlags
00C7DF 1 2A rol
00C7E0 1 90 FA bcc finishRead
00C7E2 1 68 pla
00C7E3 1 end:
00C7E3 1 60 rts
00C7E4 1
00C7E4 1 00 00 00 00 .repeat 251-<end
00C7E8 1 00 00 00 00
00C7EC 1 00 00 00 00
00C7F0 1 00 00 00 00
00C7F4 1 00 00 00 00
00C7F8 1 00 00 00 00
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00C7FC 1 .byte 0
00C7FC 1 .endrepeat
00C7FC 1 00 00 .byte 0,0 ;0000 blocks = check status
00C7FE 1 07 .byte 7 ;bit set(0=status 1=read 2=write) unset(3=format, 4/5=number of volumes, 6=interruptable, 7=removable)
00C7FF 1 14 .byte DriverEntry&$00FF ;low byte of entry
00C800 1
00C800 1