void CPU::Update()
{
const int MAXCYCLES = 70221;
int cyclesThisUpdate = 0;
while (cyclesThisUpdate < MAXCYCLES)
{
if (shouldDisableInterrupts)
{
interruptMasterEnable = false;
shouldDisableInterrupts = false;
}
if (shouldEnableInterrupts)
{
interruptMasterEnable = true;
shouldEnableInterrupts = false;
}
Instruction *instruction = InvokeInstruction(ReadByte(PC));
int cycles = instruction->GetDuration();
cyclesThisUpdate += cycles;
UpdateTimers(cycles);
UpdateGraphics(cycles);
HandleInterrupts();
}
}
void CPUWrapper::TestJump(int opcode)
{
if (testType == IMM_8)
{
lastImm8Arg = processor->ReadImm8Arg();
}
else if (testType == IMM_16)
{
lastImm16Arg = processor->ReadImm16Arg();
}
Instruction *instruction = processor->instructions[opcode];
instruction->Call();
assert(instruction->GetDuration() == expectedCyclesVarying);
assert(PC() == expectedPC);
CheckFlags();
}
void CPUWrapper::TestInstruction(int opcode)
{
ushort oldPC = PC();
if (testType == IMM_8)
{
lastImm8Arg = processor->ReadImm8Arg();
}
else if (testType == IMM_16)
{
lastImm16Arg = processor->ReadImm16Arg();
}
Instruction *instruction = processor->instructions[opcode];
instruction->Call();
assert(instruction->GetDuration() == expectedCycles[opcode]);
assert(oldPC + expectedPCAdvance[opcode] == PC());
CheckFlags();
}