int AGOSEngine::runScript() {
bool flag;
if (shouldQuit())
return 1;
do {
if (DebugMan.isDebugChannelEnabled(kDebugOpcode))
dumpOpcode(_codePtr);
if (getGameType() == GType_ELVIRA1) {
_opcode = getVarOrWord();
if (_opcode == 10000)
return 0;
} else {
_opcode = getByte();
if (_opcode == 0xFF)
return 0;
}
if (_runScriptReturn1)
return 1;
/* Invert condition? */
flag = false;
if (getGameType() == GType_ELVIRA1) {
if (_opcode == 203) {
flag = true;
_opcode = getVarOrWord();
if (_opcode == 10000)
return 0;
}
} else {
if (_opcode == 0) {
flag = true;
_opcode = getByte();
if (_opcode == 0xFF)
return 0;
}
}
setScriptCondition(true);
setScriptReturn(0);
if (_opcode > _numOpcodes)
error("Invalid opcode '%d' encountered", _opcode);
executeOpcode(_opcode);
} while (getScriptCondition() != flag && !getScriptReturn() && !shouldQuit());
return (shouldQuit()) ? 1 : getScriptReturn();
}
int AGOSEngine_PN::doaction() {
if (_linct == 0)
return 0;
_opcode = readfromline();
if (_opcode > 63) {
return (actCallD(_opcode - 64));
}
setScriptReturn(0);
executeOpcode(_opcode);
delay(0);
return getScriptReturn();
}
unsigned int CPU::step()
{
if (Q_UNLIKELY(m_paused))
{
return 0;
}
byte opcode = fetchOpcode(m_state.pc++);
bool interrupted = false;
if (Q_UNLIKELY(m_state.interrupt && m_state.int_enabled))
{
interrupted = true;
m_state.halt_flag = false;
m_state.int_enabled = false;
m_state.interrupt = false;
opcode = m_state.interrupt_opcode;
m_state.interrupt_opcode = 0;
m_state.pc--;
}
if (Q_LIKELY(!m_state.halt_flag))
{
for (auto opcodeDef : m_opcodes)
{
if (opcodeDef.isMatching(opcode))
{
auto clockCycles = executeOpcode(opcodeDef, opcode);
return clockCycles;
}
}
}
else
{
return 0;
}
error((QString("Illegal instruction : 0x") + QString::number(opcode, 16) + "/" + QString::number(opcode, 2) +
(interrupted ? " (interruption)" : " (Address : 0x" + QString::number(m_state.pc - 1, 16) + ")")).toStdString());
}