#include "mouse.h" #include #include "mouse-rom.h" Mouse::Mouse() { } Mouse::~Mouse() { } bool Mouse::Serialize(int8_t fd) { return true; } bool Mouse::Deserialize(int8_t fd) { return true; } void Mouse::Reset() { } uint8_t Mouse::readSwitches(uint8_t s) { return 0xFF; } void Mouse::writeSwitches(uint8_t s, uint8_t v) { printf("unknown switch 0x%X\n", s); } void Mouse::loadROM(uint8_t *toWhere) { /* ROM Disassembly: C400- 2C 58 FF BIT $FF58 ; test bits in FF58 w/ A C403- 70 1B BVS $C420 ; V will contain bit 6 from $FF58, which should be $20 on boot-up C405- 38 SEC C406- 90 18 BCC $C420 ; no-op; unless called @ $C406 directly? C408- B8 CLV ; clear overflow C409- 50 15 BVC $C420 ; always branches ; unused... ? more lookup table... ? C40B- 01 20 ORA ($20,X) C40D- AE AE AE LDX $AEAE ; This is the lookup table for entry addresses C410- AE C411- 00 C412- 6D ;(setmouse @ c46d) C413- 75 ;(servemouse @ C475) C414- 8E ;(readmouse @ C48E) C415- 9F ;(clearmouse @ C49F) C416- A4 ;(posmouse @ C4A4) C417- 86 ;(clampmouse @ C486) C418- A9 ;(homemouse @ C4A9) C419- 97 ;(initmouse @ C497) C41A- AE C41B- AE C41C- AE ;(semi-documented: sets mouse frequency handler to 60 or 50 hz) C41D- AE C41E- AE C41F- AE ; Main C420- 48 PHA ; push accumulator to stack C421- 98 TYA C422- 48 PHA ; push Y to stack C423- 8A TXA C424- 48 PHA ; push X to stack C424- 48 PHA C425- 08 PHP ; push status to stack C426- 78 SEI ; disable interrupts ; This JSR $FF58 is a trick to get the address we're calling from. By ; default, $FF58 contains a RTS (until patched as the DOS '&' vector, ; or ProDOS does something similar). As long as this executes before ; the DOS takes over, it's safe; but if we're doing this after ProDOS ; loads, a 64k machine might have garbage after the language card RAM ; is loaded here. A safer alternative would be something like ; LDA #$60 ; Write an RTS ($60) to a temporary memory ; STA WORK ; address, and then ; JSR WORK ; jump to it ; TSX ; LDA $100, X ; grab the return address off the stack C427- 20 58 FF JSR $FF58 C42A- BA TSX C42B- BD 00 01 LDA $0100,X C42E- AA TAX C42F- 0A ASL C430- 0A ASL C431- 0A ASL C432- 0A ASL C433- A8 TAY C434- 28 PLP ; restore status from stack C435- 50 0F BVC $C446 ; overflow is clear if ... ? C437- A5 38 LDA $38 ; >> what's in $38? C439- D0 0D BNE $C448 ; restore stack & return C43B- 8A TXA C43C- 45 39 EOR $39 ; >> what's in $39? C43E- D0 08 BNE $C448 ; restore stack & return C440- A9 05 LDA #$05 C442- 85 38 STA $38 ; ($38) = $05 C442- 85 38 STA $38 C444- D0 0B BNE $C451 C446- B0 09 BCS $C451 ; carry set if ... ? C448- 68 PLA ; pull X from stack C449- AA TAX C44A- 68 PLA ; pull Y from stack, but C44B- EA NOP ; throw it away C44C- 68 PLA ; pull A from stack C44D- 99 80 C0 STA $C080,Y ; LC RAM bank2, read and wr-protect C450- 60 RTS C451- 99 81 C0 STA $C081,Y ; LC RAM bank 2, read ROM C454- 68 PLA ; C455- BD 38 06 LDA $0638,X C458- AA TAX C459- 68 PLA C45A- A8 TAY C45B- 68 PLA C45C- BD 00 02 LDA $0200,X ; keyboard character buffer? C45F- 60 RTS C460- 00 BRK C461- 00 BRK C462- 00 BRK C463- 00 BRK C464- 00 BRK C465- 00 BRK C466- 00 BRK C467- 00 BRK C468- 00 BRK C469- 00 BRK C46A- 00 BRK C46B- 00 BRK C46C- 00 BRK ; SetMouse C46D- C9 10 CMP #$10 ; interrupt on VBL + interrupt on mouse move? C46F- B0 3F BCS $C4B0 ; RTS if A >= 0x10 C471- 99 82 C0 STA $C082,Y ; LC RAM bank 2, read ROM, wr-protect RAM C474- 60 RTS ; ServeMouse C475- 48 PHA C476- 18 CLC C477- 90 39 BCC $C4B2 ; always branches ; ServeMouse cleanup and exit C479- 99 83 C0 STA $C083,Y ; LC RAM bank 2, read RAM C47C- BD B8 06 LDA $06B8,X C47F- 29 0E AND #$0E C481- D0 01 BNE $C484 C483- 38 SEC C484- 68 PLA C485- 60 RTS ; ClampMouse C486- C9 02 CMP #$02 C488- B0 26 BCS $C4B0 ; RTS if 2 <= the A register C48A- 99 83 C0 STA $C083,Y ; LC RAM bank 2, read RAM C48D- 60 RTS ; ReadMouse C48E- A9 04 LDA #$04 C490- 99 83 C0 STA $C083,Y ; LC RAM bank 2, read RAM C493- 18 CLC C494- EA NOP C495- EA NOP C496- 60 RTS ; InitMouse C497- EA NOP C498- A9 02 LDA #$02 C49A- 99 83 C0 STA $C083,Y ; LC RAM bank 2, read RAM C49D- 18 CLC C49E- 60 RTS ; ClearMouse C49F- EA NOP C4A0- A9 05 LDA #$05 C4A2- D0 F6 BNE $C49A ; PosMouse C4A4- EA NOP C4A5- A9 06 LDA #$06 C4A7- D0 F1 BNE $C49A ; HomeMouse C4A9- EA NOP C4AA- A9 07 LDA #$07 C4AC- D0 EC BNE $C49A C4AE- A2 03 LDX #$03 C4B0- 38 SEC C4B1- 60 RTS ; ServeMouse main worker C4B2- 08 PHP C4B3- A5 00 LDA $00 C4B5- 48 PHA C4B6- A9 60 LDA #$60 C4B8- 85 00 STA $00 C4BA- 78 SEI C4BB- 20 00 00 JSR $0000 C4BE- BA TSX C4BF- 68 PLA C4C0- 85 00 STA $00 C4C2- BD 00 01 LDA $0100,X C4C5- 28 PLP C4C6- AA TAX C4C7- 0A ASL C4C8- 0A ASL C4C9- 0A ASL C4CA- 0A ASL C4CB- A8 TAY C4CC- A9 03 LDA #$03 C4CE- 18 CLC C4CF- 90 A8 BCC $C479 ; always branches */ uint8_t rom[256] = { 0x2c, 0x58, 0xff, 0x70, 0x1B, 0x38, 0x90, 0x18, 0xb8, 0x50, 0x15, 0x01, 0x20, 0xae, 0xae, 0xae, 0xae, 0x00, 0x6d, 0x75, 0x8e, 0x9f, 0xa4, 0x86, 0xa9, 0x97, 0xae, 0xae, 0xae, 0xae, 0xae, 0xae, 0x48, 0x98, 0x48, 0x8a, 0x48, 0x08, 0x78, 0x20, 0x58, 0xFF, 0xBA, 0xBD, 0x00, 0x01, 0xAA, 0x0A, 0x0A, 0x0A, 0x0A, 0xA8, 0x28, 0x50, 0x0F, 0xA5, 0x38, 0xd0, 0x0d, 0x8a, 0x45, 0x39, 0xd0, 0x08, 0xa9, 0x05, 0x85, 0x38, 0xd0, 0x0b, 0xb0, 0x09, 0x68, 0xaa, 0x68, 0xea, 0x68, 0x99, 0x80, 0xc0, 0x60, 0x99, 0x81, 0xc0, 0x68, 0xbd, 0x38, 0x06, 0xaa, 0x68, 0xa8, 0x68, 0xbd, 0x00, 0x02, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc9, 0x10, 0xb0, 0x3f, 0x99, 0x82, 0xc0, 0x60, 0x48, 0x18, 0x90, 0x39, 0x99, 0x83, 0xc0, 0xbd, 0xb8, 0x06, 0x29, 0x0E, 0xD0, 0x01, 0x38, 0x68, 0x60, 0xc9, 0x02, 0xb0, 0x26, 0x99, 0x83, 0xc0, 0x60, 0xa9, 0x04, 0x99, 0x83, 0xc0, 0x18, 0xea, 0xea, 0x60, 0xea, 0xa9, 0x02, 0x99, 0x83, 0xc0, 0x18, 0x60, 0xea, 0xa9, 0x05, 0xd0, 0xf6, 0xea, 0xa9, 0x06, 0xd0, 0xf1, 0xea, 0xa9, 0x07, 0xd0, 0xec, 0xa2, 0x03, 0x38, 0x60, 0x08, 0xa5, 0x00, 0x48, 0xa9, 0x60, 0x85, 0x00, 0x78, 0x20, 0x00, 0x00, 0xba, 0x68, 0x85, 0x00, 0xbd, 0x00, 0x01, 0x28, 0xaa, 0x0a, 0x0a, 0x0a, 0x0a, 0xa8, 0xa9, 0x03, 0x18, 0x90, 0xa8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xd6, 0xff, 0xff, 0xff, 0x01 }; memcpy(toWhere, rom, 256); } bool Mouse::hasExtendedRom() { return true; } void Mouse::loadExtendedRom(uint8_t *toWhere, uint16_t byteOffset) { printf("loading extended rom for the mouse\n"); for (int i=0; i<256; i++) { toWhere[i] = romData[i + byteOffset]; } }