mirror of
https://github.com/tjboldt/Apple2-IO-RPi.git
synced 2024-06-01 19:41:33 +00:00
148 lines
5.2 KiB
Plaintext
148 lines
5.2 KiB
Plaintext
ca65 V2.18 - N/A
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Main file : FileAccessFirmware.asm
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Current file: FileAccessFirmware.asm
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000000r 1 ;ProDOS Zero Page
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000000r 1 Command = $42 ;ProDOS Command
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000000r 1 Unit = $43 ;ProDOS unit (SDDD0000)
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000000r 1 BufferLo = $44
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000000r 1 BufferHi = $45
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000000r 1 BlockLo = $46
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000000r 1 BlockHi = $47
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000000r 1
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000000r 1 ; ProDOS Error Codes
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000000r 1 IOError = $27
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000000r 1 NoDevice = $28
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000000r 1 WriteProtect = $2B
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000000r 1
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000000r 1 InputByte = $c08e+SLOT*$10
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000000r 1 OutputByte = $c08d+SLOT*$10
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000000r 1 InputFlags = $c08b+SLOT*$10
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000000r 1 OutputFlags = $c087+SLOT*$10
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000000r 1
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000000r 1 ReadBlockCommand = $01
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000000r 1 WriteBlockCommand = $02
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000000r 1 GetTimeCommand = $03
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000000r 1 ChangeDriveCommand = $04
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000000r 1 ExecCommand = $05
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000000r 1 LoadFileCommand = $06
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000000r 1 SaveFileCommand = $07
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000000r 1
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000000r 1 .org SLOT*$100 + $C000
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00C700 1 ;ID bytes for booting and drive detection
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00C700 1 E0 20 cpx #$20 ;ID bytes for ProDOS and the
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00C702 1 E0 00 cpx #$00 ; Apple Autostart ROM
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00C704 1 E0 03 cpx #$03 ;
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00C706 1
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00C706 1 A2 70 ldx #SLOT*$10
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00C708 1 86 2B stx $2b
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00C70A 1 86 43 stx Unit
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00C70C 1
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00C70C 1 ;force EPROM to second page on boot
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00C70C 1 A9 3F lda #$3f ;set all flags high and page 3 of EPROM for menu
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00C70E 1 PageJump:
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00C70E 1 8D F7 C0 sta OutputFlags
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00C711 1 4C 19 C7 jmp Start ;this jump is only called if coming in from PageJump with A=$2f
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00C714 1
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00C714 1 ;entry points for ProDOS
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00C714 1 DriverEntry:
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00C714 1 A9 0F lda #$0f ;set all flags high and page 0 of EPROM
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00C716 1 8D F7 C0 sta OutputFlags
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00C719 1
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00C719 1 Start:
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00C719 1
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00C719 1 ; Put command firmware here
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00C719 1 ;
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00C719 1 ;
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00C719 1 ;
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00C719 1 60 rts
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00C71A 1
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00C71A 1 SendByte:
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00C71A 1 48 pha
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00C71B 1 waitWrite:
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00C71B 1 AD FB C0 lda InputFlags
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00C71E 1 2A rol
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00C71F 1 2A rol
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00C720 1 B0 F9 bcs waitWrite
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00C722 1 68 pla
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00C723 1 8D FD C0 sta OutputByte
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00C726 1 A9 0E lda #$0e ; set bit 0 low to indicate write started
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00C728 1 8D F7 C0 sta OutputFlags
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00C72B 1 finishWrite:
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00C72B 1 AD FB C0 lda InputFlags
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00C72E 1 2A rol
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00C72F 1 2A rol
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00C730 1 90 F9 bcc finishWrite
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00C732 1 A9 0F lda #$0f
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00C734 1 8D F7 C0 sta OutputFlags
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00C737 1 60 rts
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00C738 1
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00C738 1 GetByte:
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00C738 1 A9 0D lda #$0d ;set read flag low
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00C73A 1 8D F7 C0 sta OutputFlags
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00C73D 1 waitRead:
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00C73D 1 AD FB C0 lda InputFlags
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00C740 1 2A rol
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00C741 1 B0 FA bcs waitRead
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00C743 1 AD FE C0 lda InputByte
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00C746 1 48 pha
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00C747 1 A9 0F lda #$0f ;set all flags high
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00C749 1 8D F7 C0 sta OutputFlags
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00C74C 1 finishRead:
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00C74C 1 AD FB C0 lda InputFlags
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00C74F 1 2A rol
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00C750 1 90 FA bcc finishRead
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00C752 1 68 pla
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00C753 1 end:
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00C753 1 60 rts
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00C754 1
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00C754 1 00 00 00 00 .repeat 251-<end
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00C758 1 00 00 00 00
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00C75C 1 00 00 00 00
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00C760 1 00 00 00 00
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00C764 1 00 00 00 00
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00C768 1 00 00 00 00
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00C76C 1 00 00 00 00
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00C770 1 00 00 00 00
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00C774 1 00 00 00 00
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00C778 1 00 00 00 00
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00C77C 1 00 00 00 00
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00C780 1 00 00 00 00
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00C784 1 00 00 00 00
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00C788 1 00 00 00 00
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00C78C 1 00 00 00 00
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00C790 1 00 00 00 00
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00C794 1 00 00 00 00
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00C798 1 00 00 00 00
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00C79C 1 00 00 00 00
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00C7A0 1 00 00 00 00
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00C7A4 1 00 00 00 00
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00C7A8 1 00 00 00 00
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00C7AC 1 00 00 00 00
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00C7B0 1 00 00 00 00
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00C7B4 1 00 00 00 00
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00C7B8 1 00 00 00 00
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00C7BC 1 00 00 00 00
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00C7C0 1 00 00 00 00
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00C7C4 1 00 00 00 00
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00C7C8 1 00 00 00 00
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00C7CC 1 00 00 00 00
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00C7D0 1 00 00 00 00
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00C7D4 1 00 00 00 00
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00C7D8 1 00 00 00 00
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00C7DC 1 00 00 00 00
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00C7E0 1 00 00 00 00
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00C7E4 1 00 00 00 00
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00C7E8 1 00 00 00 00
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00C7EC 1 00 00 00 00
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00C7F0 1 00 00 00 00
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00C7F4 1 00 00 00 00
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00C7F8 1 00 00 00 00
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00C7FC 1 .byte 0
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00C7FC 1 .endrepeat
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00C7FC 1 00 00 .byte 0,0 ;0000 blocks = check status
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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)
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00C7FF 1 14 .byte DriverEntry&$00FF ;low byte of entry
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00C800 1
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00C800 1
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