ca65 V2.18 - Debian 2.19-1 Main file : MenuFirmware.asm Current file: MenuFirmware.asm 000000r 1 ; Copyright Terence J. Boldt (c)2020-2024 000000r 1 ; Use of this source code is governed by an MIT 000000r 1 ; license that can be found in the LICENSE file. 000000r 1 000000r 1 ; This file contains the source for the firmware 000000r 1 ; that displays the copyright message on boot 000000r 1 ; and checks for the RPi status to be ready before 000000r 1 ; attempting to boot 000000r 1 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 ResetCommand = $00 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 BasCalc = $fbc1 000000r 1 htab = $24 000000r 1 vtab = $25 000000r 1 BasL = $28 000000r 1 htab80 = $057b 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 ;jsr Home ;clear screen and show menu options 00C721 1 A9 02 lda #$02 00C723 1 85 25 sta vtab 00C725 1 20 C1 FB jsr BasCalc 00C728 1 A0 00 ldy #$00 00C72A 1 84 24 sty htab 00C72C 1 PrintString: 00C72C 1 B9 AB C7 lda Text,y 00C72F 1 F0 08 beq WaitForRPi 00C731 1 09 80 ora #$80 00C733 1 20 ED FD jsr PrintChar 00C736 1 C8 iny 00C737 1 D0 F3 bne PrintString 00C739 1 00C739 1 .if HW_TYPE = 0 00C739 1 00C739 1 WaitForRPi: 00C739 1 2C FB C0 bit InputFlags 00C73C 1 30 0D bmi Reset 00C73E 1 A9 FF lda #$ff 00C740 1 20 A8 FC jsr Wait 00C743 1 A9 AE lda #'.'+$80 00C745 1 20 ED FD jsr PrintChar 00C748 1 4C 39 C7 jmp WaitForRPi 00C74B 1 00C74B 1 Reset: 00C74B 1 A9 DF lda #'_'|$80 00C74D 1 20 ED FD jsr PrintChar 00C750 1 A9 00 lda #ResetCommand 00C752 1 20 7B C7 jsr SendByte 00C755 1 A9 88 lda #$88 00C757 1 20 ED FD jsr PrintChar 00C75A 1 A9 AE lda #'.'|$80 00C75C 1 20 ED FD jsr PrintChar 00C75F 1 20 93 C7 jsr GetByte 00C762 1 F0 03 beq Ok 00C764 1 4C 4B C7 jmp Reset 00C767 1 00C767 1 .else 00C767 1 00C767 1 WaitForRPi: 00C767 1 @1: 00C767 1 bit InputFlags 00C767 1 bmi @2 00C767 1 lda InputByte 00C767 1 jmp @1 00C767 1 @2: 00C767 1 bit InputFlags 00C767 1 bpl @4 00C767 1 bvs @3 00C767 1 lda #ResetCommand 00C767 1 sta OutputByte 00C767 1 @3: 00C767 1 lda #$ff 00C767 1 jsr Wait 00C767 1 lda #'.'+$80 00C767 1 jsr PrintChar 00C767 1 jmp @2 00C767 1 @4: 00C767 1 lda #$ff 00C767 1 jsr Wait 00C767 1 @5: 00C767 1 bit InputFlags 00C767 1 bmi Ok 00C767 1 lda InputByte 00C767 1 jmp @5 00C767 1 00C767 1 .endif 00C767 1 00C767 1 Ok: 00C767 1 A9 8D lda #$8D 00C769 1 20 ED FD jsr PrintChar 00C76C 1 A9 CF lda #'O'|$80 00C76E 1 20 ED FD jsr PrintChar 00C771 1 A9 CB lda #'K'|$80 00C773 1 20 ED FD jsr PrintChar 00C776 1 00C776 1 Boot: 00C776 1 A9 0F lda #$0f 00C778 1 4C 0E C7 jmp PageJump 00C77B 1 00C77B 1 SendByte: 00C77B 1 2C FB C0 bit InputFlags 00C77E 1 70 FB bvs SendByte 00C780 1 8D FD C0 sta OutputByte 00C783 1 .if HW_TYPE = 0 00C783 1 A9 3E lda #$3e ; set bit 0 low to indicate write started 00C785 1 8D F7 C0 sta OutputFlags 00C788 1 finishWrite: 00C788 1 2C FB C0 bit InputFlags 00C78B 1 50 FB bvc finishWrite 00C78D 1 A9 3F lda #$3f 00C78F 1 8D F7 C0 sta OutputFlags 00C792 1 .endif 00C792 1 60 rts 00C793 1 00C793 1 GetByte: 00C793 1 .if HW_TYPE = 0 00C793 1 A2 3D ldx #$3d ;set read flag low 00C795 1 8E F7 C0 stx OutputFlags 00C798 1 .endif 00C798 1 waitRead: 00C798 1 2C FB C0 bit InputFlags 00C79B 1 30 FB bmi waitRead 00C79D 1 AD FE C0 lda InputByte 00C7A0 1 .if HW_TYPE = 0 00C7A0 1 A2 3F ldx #$3f ;set all flags high 00C7A2 1 8E F7 C0 stx OutputFlags 00C7A5 1 finishRead: 00C7A5 1 2C FB C0 bit InputFlags 00C7A8 1 10 FB bpl finishRead 00C7AA 1 .endif 00C7AA 1 60 rts 00C7AB 1 00C7AB 1 Text: 00C7AB 1 41 70 70 6C .byte "Apple2-IO-RPi",$8d 00C7AF 1 65 32 2D 49 00C7B3 1 4F 2D 52 50 00C7B7 1 69 8D 00C7B9 1 28 63 29 32 .byte "(c)2020-2024 Terence J. Boldt",$8d 00C7BD 1 30 32 30 2D 00C7C1 1 32 30 32 34 00C7C5 1 20 54 65 72 00C7C9 1 65 6E 63 65 00C7CD 1 20 4A 2E 20 00C7D1 1 42 6F 6C 64 00C7D5 1 74 8D 00C7D7 1 8D .byte $8d 00C7D8 1 .if HW_TYPE = 0 00C7D8 1 57 61 69 74 .byte "Waiting for RPi FW:0010..." 00C7DC 1 69 6E 67 20 00C7E0 1 66 6F 72 20 00C7E4 1 52 50 69 20 00C7E8 1 46 57 3A 30 00C7EC 1 30 31 30 2E 00C7F0 1 2E 2E 00C7F2 1 .else 00C7F2 1 .byte "Waiting for RPi FW:8010..." 00C7F2 1 .endif 00C7F2 1 end: 00C7F2 1 00 .byte $00 00C7F3 1 00C7F3 1 00 00 00 00 .repeat 251-