public static bool IsInfiniteLoop(Gameboy gb)
{
Cpu cpu = gb.Cpu;
if (cpu.State != State.OPCODE)
{
return(false);
}
Registers regs = cpu.Registers;
IAddressSpace mem = gb.Mmu;
int i = regs.PC;
bool found = true;
foreach (int v in new int[] { 0x18, 0xfe })
{
// jr fe
if (mem.GetByte(i++) != v)
{
found = false;
break;
}
}
if (found)
{
return(true);
}
i = regs.PC;
foreach (int v in new int[] { 0xc3, BitUtils.GetLsb(i), BitUtils.GetMsb(i) })
{
// jp pc
if (mem.GetByte(i++) != v)
{
return(false);
}
}
return(true);
}