ca65 V2.19 - Git 59c58acb 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 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 $fc58 ;clear screen and show menu options 00C724 1 A0 00 ldy #$00 00C726 1 PrintString: 00C726 1 B9 42 C7 lda Text,y 00C729 1 F0 08 beq GetChar 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 00C733 1 GetChar: 00C733 1 20 0C FD jsr $fd0c 00C736 1 38 sec ;subtract ascii "1" to get 0 - 3 from "1" to "4" 00C737 1 E9 B1 sbc #$b1 00C739 1 0A asl ;put in top nibble as EPROM page 00C73A 1 0A asl 00C73B 1 0A asl 00C73C 1 0A asl 00C73D 1 09 0F ora #$0f ;set all flags high 00C73F 1 4C 0E C7 jmp PageJump 00C742 1 00C742 1 Text: 00C742 1 00C742 1 41 70 70 6C .byte "Apple2-IO-RPi",$8d 00C746 1 65 32 2D 49 00C74A 1 4F 2D 52 50 00C74E 1 69 8D 00C750 1 28 63 29 32 .byte "(c)2020-2021 Terence J. Boldt",$8d 00C754 1 30 32 30 2D 00C758 1 32 30 32 31 00C75C 1 20 54 65 72 00C760 1 65 6E 63 65 00C764 1 20 4A 2E 20 00C768 1 42 6F 6C 64 00C76C 1 74 8D 00C76E 1 8D .byte $8d 00C76F 1 31 2E 20 42 .byte "1. Boot",$8d 00C773 1 6F 6F 74 8D 00C777 1 32 2E 20 43 .byte "2. Command Line",$8d 00C77B 1 6F 6D 6D 61 00C77F 1 6E 64 20 4C 00C783 1 69 6E 65 8D 00C787 1 33 2E 20 4C .byte "3. Load File",$8d 00C78B 1 6F 61 64 20 00C78F 1 46 69 6C 65 00C793 1 8D 00C794 1 8D .byte $8d 00C795 1 4D 61 79 20 .byte "May take 45 seconds for RPi to start",$8d 00C799 1 74 61 6B 65 00C79D 1 20 34 35 20 00C7A1 1 73 65 63 6F 00C7A5 1 6E 64 73 20 00C7A9 1 66 6F 72 20 00C7AD 1 52 50 69 20 00C7B1 1 74 6F 20 73 00C7B5 1 74 61 72 74 00C7B9 1 8D 00C7BA 1 61 66 74 65 .byte "after intial power-on...",$00 00C7BE 1 72 20 69 6E 00C7C2 1 74 69 61 6C 00C7C6 1 20 70 6F 77 00C7CA 1 65 72 2D 6F 00C7CE 1 6E 2E 2E 2E 00C7D2 1 00 00C7D3 1 00C7D3 1 end: 00C7D3 1 60 rts 00C7D4 1 00C7D4 1 00 00 00 00 .repeat 251-