AppleWin/source/CPU.h
tomcw ceb0416bf3 Fixed 6522 & interrupt:
. Broadside needs to see IRQ within 17 cycles (6 opcodes) of 6522 counter underflowing to detect Mockingboard. (Fixes #605)
2019-01-06 16:54:54 +00:00

45 lines
1.4 KiB
C

#pragma once
struct regsrec
{
BYTE a; // accumulator
BYTE x; // index X
BYTE y; // index Y
BYTE ps; // processor status
WORD pc; // program counter
WORD sp; // stack pointer
BYTE bJammed; // CPU has crashed (NMOS 6502 only)
};
extern regsrec regs;
extern unsigned __int64 g_nCumulativeCycles;
void CpuAdjustIrqCheck(UINT uCyclesUntilInterrupt);
void CpuDestroy ();
void CpuCalcCycles(ULONG nExecutedCycles);
DWORD CpuExecute(const DWORD uCycles, const bool bVideoUpdate);
ULONG CpuGetCyclesThisVideoFrame(ULONG nExecutedCycles);
void CpuInitialize ();
void CpuSetupBenchmark ();
void CpuIrqReset();
void CpuIrqAssert(eIRQSRC Device);
void CpuIrqDeassert(eIRQSRC Device);
void CpuNmiReset();
void CpuNmiAssert(eIRQSRC Device);
void CpuNmiDeassert(eIRQSRC Device);
void CpuReset ();
void CpuSaveSnapshot(class YamlSaveHelper& yamlSaveHelper);
void CpuLoadSnapshot(class YamlLoadHelper& yamlLoadHelper);
BYTE CpuRead(USHORT addr, ULONG uExecutedCycles);
void CpuWrite(USHORT addr, BYTE a, ULONG uExecutedCycles);
enum eCpuType {CPU_UNKNOWN=0, CPU_6502=1, CPU_65C02, CPU_Z80}; // Don't change! Persisted to Registry
eCpuType GetMainCpu(void);
void SetMainCpu(eCpuType cpu);
eCpuType ProbeMainCpuDefault(eApple2Type apple2Type);
void SetMainCpuDefault(eApple2Type apple2Type);
eCpuType GetActiveCpu(void);
void SetActiveCpu(eCpuType cpu);