ca65 V2.18 - N/A
Main file   : FileAccessFirmware.asm
Current file: FileAccessFirmware.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
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
000000r 1               
000000r 1                .org SLOT*$100 + $C000
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 3 of EPROM for menu
00C70E  1               PageJump:
00C70E  1  8D F7 C0      sta OutputFlags
00C711  1  4C 19 C7      jmp Start ;this jump is only called if coming in from PageJump with A=$2f
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               
00C719  1               Start:
00C719  1               
00C719  1               ; Put command firmware here
00C719  1               ;
00C719  1               ;
00C719  1               ;
00C719  1  60            rts
00C71A  1               
00C71A  1               SendByte:
00C71A  1  48            pha
00C71B  1               waitWrite:
00C71B  1  AD FB C0      lda InputFlags
00C71E  1  2A            rol
00C71F  1  2A            rol
00C720  1  B0 F9         bcs waitWrite
00C722  1  68            pla
00C723  1  8D FD C0      sta OutputByte
00C726  1  A9 0E         lda #$0e ; set bit 0 low to indicate write started
00C728  1  8D F7 C0      sta OutputFlags
00C72B  1               finishWrite:
00C72B  1  AD FB C0      lda InputFlags
00C72E  1  2A            rol
00C72F  1  2A            rol
00C730  1  90 F9         bcc finishWrite
00C732  1  A9 0F         lda #$0f
00C734  1  8D F7 C0      sta OutputFlags
00C737  1  60            rts
00C738  1               
00C738  1               GetByte:
00C738  1  A9 0D         lda #$0d ;set read flag low
00C73A  1  8D F7 C0      sta OutputFlags
00C73D  1               waitRead:
00C73D  1  AD FB C0      lda InputFlags
00C740  1  2A            rol
00C741  1  B0 FA         bcs waitRead
00C743  1  AD FE C0      lda InputByte
00C746  1  48            pha
00C747  1  A9 0F         lda #$0f ;set all flags high
00C749  1  8D F7 C0      sta OutputFlags
00C74C  1               finishRead:
00C74C  1  AD FB C0      lda InputFlags
00C74F  1  2A            rol
00C750  1  90 FA         bcc finishRead
00C752  1  68            pla
00C753  1               end:
00C753  1  60            rts
00C754  1               
00C754  1  00 00 00 00  .repeat	251-<end
00C758  1  00 00 00 00  
00C75C  1  00 00 00 00  
00C760  1  00 00 00 00  
00C764  1  00 00 00 00  
00C768  1  00 00 00 00  
00C76C  1  00 00 00 00  
00C770  1  00 00 00 00  
00C774  1  00 00 00 00  
00C778  1  00 00 00 00  
00C77C  1  00 00 00 00  
00C780  1  00 00 00 00  
00C784  1  00 00 00 00  
00C788  1  00 00 00 00  
00C78C  1  00 00 00 00  
00C790  1  00 00 00 00  
00C794  1  00 00 00 00  
00C798  1  00 00 00 00  
00C79C  1  00 00 00 00  
00C7A0  1  00 00 00 00  
00C7A4  1  00 00 00 00  
00C7A8  1  00 00 00 00  
00C7AC  1  00 00 00 00  
00C7B0  1  00 00 00 00  
00C7B4  1  00 00 00 00  
00C7B8  1  00 00 00 00  
00C7BC  1  00 00 00 00  
00C7C0  1  00 00 00 00  
00C7C4  1  00 00 00 00  
00C7C8  1  00 00 00 00  
00C7CC  1  00 00 00 00  
00C7D0  1  00 00 00 00  
00C7D4  1  00 00 00 00  
00C7D8  1  00 00 00 00  
00C7DC  1  00 00 00 00  
00C7E0  1  00 00 00 00  
00C7E4  1  00 00 00 00  
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  
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