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Implement STP and WAI.

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Thomas Harte
2025-10-24 23:47:30 -04:00
parent 2bac276870
commit 8b04608d68
1 changed files with 22 additions and 0 deletions
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22
Processors/6502Mk2/Implementation/6502.hpp
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@@ -689,6 +689,28 @@ void Processor<model, Traits>::run_for(const Cycles cycles) {
check_interrupt();
access(BusOperation::Read, Vector(0xfd), registers.pc.halves.high);
goto fetch_decode;
// MARK: - STP and WAI.
case access_program(STP):
stopped:
if(Storage::cycles_ <= Cycles(0)) {
Storage::resume_point_ = access_program(STP);
return;
}
access(BusOperation::None, Vector(0xff), Data::NoValue{});
goto stopped;
case access_program(WAI):
waiting:
if(Storage::cycles_ <= Cycles(0)) {
Storage::resume_point_ = access_program(WAI);
return;
}
access(BusOperation::Ready, Vector(0xff), Data::NoValue{});
if(Storage::inputs_.interrupt_requests) {
goto fetch_decode;
}
goto waiting;
}
#undef access_program