mirror of https://github.com/bsnes-emu/bsnes.git
77 lines
1.5 KiB
C++
77 lines
1.5 KiB
C++
#include <processor/processor.hpp>
|
|
#include "r65816.hpp"
|
|
|
|
namespace Processor {
|
|
|
|
#include "algorithms.cpp"
|
|
#include "disassembler.cpp"
|
|
#include "serialization.cpp"
|
|
|
|
#define E if(r.e)
|
|
#define N if(!r.e)
|
|
#define L lastCycle();
|
|
#define call(op) (this->*op)()
|
|
|
|
#include "opcode_read.cpp"
|
|
#include "opcode_write.cpp"
|
|
#include "opcode_rmw.cpp"
|
|
#include "opcode_pc.cpp"
|
|
#include "opcode_misc.cpp"
|
|
#include "switch.cpp"
|
|
|
|
//immediate, 2-cycle opcodes with I/O cycle will become bus read
|
|
//when an IRQ is to be triggered immediately after opcode completion.
|
|
//this affects the following opcodes:
|
|
// clc, cld, cli, clv, sec, sed, sei,
|
|
// tax, tay, txa, txy, tya, tyx,
|
|
// tcd, tcs, tdc, tsc, tsx, txs,
|
|
// inc, inx, iny, dec, dex, dey,
|
|
// asl, lsr, rol, ror, nop, xce.
|
|
auto R65816::ioIRQ() -> void {
|
|
if(interruptPending()) {
|
|
//modify I/O cycle to bus read cycle, do not increment PC
|
|
read(r.pc.d);
|
|
} else {
|
|
io();
|
|
}
|
|
}
|
|
|
|
auto R65816::io2() -> void {
|
|
if(r.d.l != 0x00) {
|
|
io();
|
|
}
|
|
}
|
|
|
|
auto R65816::io4(uint16 x, uint16 y) -> void {
|
|
if(!r.p.x || (x & 0xff00) != (y & 0xff00)) {
|
|
io();
|
|
}
|
|
}
|
|
|
|
auto R65816::io6(uint16 addr) -> void {
|
|
if(r.e && (r.pc.w & 0xff00) != (addr & 0xff00)) {
|
|
io();
|
|
}
|
|
}
|
|
|
|
auto R65816::interrupt() -> void {
|
|
read(r.pc.d);
|
|
io();
|
|
N writeSP(r.pc.b);
|
|
writeSP(r.pc.h);
|
|
writeSP(r.pc.l);
|
|
writeSP(r.e ? (r.p & ~0x10) : r.p);
|
|
r.pc.l = read(r.vector + 0);
|
|
r.p.i = 1;
|
|
r.p.d = 0;
|
|
r.pc.h = read(r.vector + 1);
|
|
r.pc.b = 0x00;
|
|
}
|
|
|
|
#undef E
|
|
#undef N
|
|
#undef L
|
|
#undef call
|
|
|
|
}
|