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cpu/decoder - Treat undefined opcodes as NOP

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madmaurice 2023-08-29 23:59:32 +02:00
parent c90788d330
commit c4a9a10e09
1 changed files with 16 additions and 1 deletions
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17
cpu/decoder.cpp
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@ -300,7 +300,22 @@ void Cpu::executeInstruction()
{ {
switch(op) switch(op)
{ {
case 0x00: break; // NOP case 0xD3: // Undefined, treat as NOP
case 0xE3:
case 0xE4:
case 0xF4:
case 0xDB:
case 0xEB:
case 0xEC:
case 0xFC:
case 0xDD:
case 0xED:
case 0xFD:
break;
case 0x00: // defined NOP
break;
case 0x0A: // Load A, [BC] case 0x0A: // Load A, [BC]
state.A = bus->read8(state.BC); state.A = bus->read8(state.BC);
mcycles = 2; mcycles = 2;