mirror of
https://github.com/bsnes-emu/bsnes.git
synced 2025-02-24 23:22:25 +01:00
ad51f1478e
byuu says: 26 hours in, 173 instructions implemented. Although the four segment prefix opcodes don't actually do anything yet. There's less than 256 actual instructions on the 80186, not sure of the exact count. Gunpey gets around ~8,200 instructions in before hitting an unsupported opcode (loop). Riviera goes off the rails on a retf and ends up executing an endless stream of bad opcodes in RAM =( Both games hammer the living shit out of the in/out ports pretty much immediately.
116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
//Ricoh 6502
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//* Ricoh 2A03
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//* Ricoh 2A07
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#pragma once
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namespace Processor {
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struct R6502 {
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virtual auto op_read(uint16 addr) -> uint8 = 0;
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virtual auto op_write(uint16 addr, uint8 data) -> void = 0;
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virtual auto last_cycle() -> void = 0;
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virtual auto nmi(uint16& vector) -> void = 0;
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virtual auto debugger_read(uint16 addr) -> uint8 { return 0u; }
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auto mdr() const -> uint8;
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auto power() -> void;
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auto reset() -> void;
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auto interrupt() -> void;
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auto exec() -> void;
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auto serialize(serializer&) -> void;
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//memory.cpp
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auto op_readpc() -> uint8;
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auto op_readpci() -> uint8;
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auto op_readsp() -> uint8;
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auto op_readzp(uint8 addr) -> uint8;
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auto op_writesp(uint8 data) -> void;
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auto op_writezp(uint8 addr, uint8 data) -> void;
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auto op_page(uint16 x, uint16 y) -> void;
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auto op_page_always(uint16 x, uint16 y) -> void;
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//instructions.cpp
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auto opf_asl();
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auto opf_adc();
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auto opf_and();
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auto opf_bit();
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auto opf_cmp();
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auto opf_cpx();
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auto opf_cpy();
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auto opf_dec();
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auto opf_eor();
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auto opf_inc();
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auto opf_lda();
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auto opf_ldx();
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auto opf_ldy();
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auto opf_lsr();
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auto opf_ora();
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auto opf_rla();
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auto opf_rol();
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auto opf_ror();
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auto opf_rra();
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auto opf_sbc();
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auto opf_sla();
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auto opf_sra();
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auto opi_branch(bool condition);
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auto opi_clear_flag(bool& flag);
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auto opi_decrement(uint8& r);
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auto opi_increment(uint8& r);
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auto opi_pull(uint8& r);
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auto opi_push(uint8& r);
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template<auto (R6502::*op)() -> void> auto opi_read_absolute();
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template<auto (R6502::*op)() -> void> auto opi_read_absolute_x();
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template<auto (R6502::*op)() -> void> auto opi_read_absolute_y();
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template<auto (R6502::*op)() -> void> auto opi_read_immediate();
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template<auto (R6502::*op)() -> void> auto opi_read_indirect_zero_page_x();
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template<auto (R6502::*op)() -> void> auto opi_read_indirect_zero_page_y();
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template<auto (R6502::*op)() -> void> auto opi_read_zero_page();
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template<auto (R6502::*op)() -> void> auto opi_read_zero_page_x();
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template<auto (R6502::*op)() -> void> auto opi_read_zero_page_y();
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template<auto (R6502::*op)() -> void> auto opi_rmw_absolute();
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template<auto (R6502::*op)() -> void> auto opi_rmw_absolute_x();
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template<auto (R6502::*op)() -> void> auto opi_rmw_zero_page();
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template<auto (R6502::*op)() -> void> auto opi_rmw_zero_page_x();
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auto opi_set_flag(bool& flag);
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template<auto (R6502::*op)() -> void> auto opi_shift();
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auto opi_store_absolute(uint8& r);
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auto opi_store_absolute_x(uint8& r);
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auto opi_store_absolute_y(uint8& r);
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auto opi_store_indirect_zero_page_x(uint8& r);
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auto opi_store_indirect_zero_page_y(uint8& r);
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auto opi_store_zero_page(uint8& r);
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auto opi_store_zero_page_x(uint8& r);
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auto opi_store_zero_page_y(uint8& r);
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auto opi_transfer(uint8& s, uint8& d, bool flag);
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auto op_brk();
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auto op_jmp_absolute();
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auto op_jmp_indirect_absolute();
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auto op_jsr_absolute();
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auto op_nop();
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auto op_php();
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auto op_plp();
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auto op_rti();
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auto op_rts();
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auto opill_arr_immediate();
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auto opill_nop_absolute();
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auto opill_nop_absolute_x();
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auto opill_nop_immediate();
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auto opill_nop_implied();
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auto opill_nop_zero_page();
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auto opill_nop_zero_page_x();
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//disassembler.cpp
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auto disassemble() -> string;
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#include "registers.hpp"
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};
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}
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