ca65 V2.18 - N/A 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 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 MenuCommand = $08 000000r 1 000000r 1 Wait = $fca8 000000r 1 PrintChar = $fded 000000r 1 Home = $fc58 000000r 1 ReadChar = $fd0c 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 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 Home ;clear screen and show menu options 00C724 1 A0 00 ldy #$00 00C726 1 PrintString: 00C726 1 B9 B8 C7 lda Text,y 00C729 1 F0 08 beq WaitForRPi 00C72B 1 09 80 ora #$80 00C72D 1 20 ED FD jsr PrintChar 00C730 1 C8 iny 00C731 1 D0 F3 bne PrintString 00C733 1 00C733 1 WaitForRPi: 00C733 1 AD FB C0 lda InputFlags 00C736 1 2A rol 00C737 1 B0 0D bcs OK 00C739 1 A9 FF lda #$ff 00C73B 1 20 A8 FC jsr Wait 00C73E 1 A9 2E lda #'.' 00C740 1 20 ED FD jsr PrintChar 00C743 1 4C 33 C7 jmp WaitForRPi 00C746 1 00C746 1 OK: 00C746 1 20 58 FC jsr Home ;clear screen 00C749 1 00C749 1 A9 08 lda #MenuCommand ;request menu text from RPi 00C74B 1 20 6A C7 jsr SendByte 00C74E 1 00C74E 1 DumpOutput: 00C74E 1 20 88 C7 jsr GetByte 00C751 1 C9 00 cmp #$00 00C753 1 F0 06 beq GetChar 00C755 1 20 ED FD jsr PrintChar 00C758 1 18 clc 00C759 1 90 F3 bcc DumpOutput 00C75B 1 00C75B 1 GetChar: 00C75B 1 20 0C FD jsr ReadChar 00C75E 1 38 sec ;subtract ascii "1" to get 0 - 3 from "1" to "4" 00C75F 1 E9 B1 sbc #$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 SendByte: 00C76A 1 48 pha 00C76B 1 waitWrite: 00C76B 1 AD FB C0 lda InputFlags 00C76E 1 2A rol 00C76F 1 2A rol 00C770 1 B0 F9 bcs waitWrite 00C772 1 68 pla 00C773 1 8D FD C0 sta OutputByte 00C776 1 A9 3E lda #$3e ; set bit 0 low to indicate write started 00C778 1 8D F7 C0 sta OutputFlags 00C77B 1 finishWrite: 00C77B 1 AD FB C0 lda InputFlags 00C77E 1 2A rol 00C77F 1 2A rol 00C780 1 90 F9 bcc finishWrite 00C782 1 A9 3F lda #$3f 00C784 1 8D F7 C0 sta OutputFlags 00C787 1 60 rts 00C788 1 00C788 1 GetByte: 00C788 1 A9 3D lda #$3d ;set read flag low 00C78A 1 8D F7 C0 sta OutputFlags 00C78D 1 waitRead: 00C78D 1 AD FB C0 lda InputFlags 00C790 1 2A rol 00C791 1 B0 FA bcs waitRead 00C793 1 AD FE C0 lda InputByte 00C796 1 48 pha 00C797 1 A9 3F lda #$3f ;set all flags high 00C799 1 8D F7 C0 sta OutputFlags 00C79C 1 finishRead: 00C79C 1 AD FB C0 lda InputFlags 00C79F 1 2A rol 00C7A0 1 90 FA bcc finishRead 00C7A2 1 68 pla 00C7A3 1 end: 00C7A3 1 60 rts 00C7A4 1 00C7A4 1 00 00 00 00 .repeat 183-GetByte 00C7FA 1 6A .byte SendByte 00C7FC 1 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