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Interrupt fixes: supply proper address, raise level, fetch from vector.

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This commit is contained in:
Thomas Harte 2022-05-24 12:15:35 -04:00
parent eab720f6ea
commit 0dfaa7d9cf
1 changed files with 6 additions and 3 deletions
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9
Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp
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@ -425,6 +425,7 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
captured_status_.w = status_.status();
status_.is_supervisor = true;
status_.trace_flag = 0;
status_.interrupt_level = captured_interrupt_level_;
did_update_status();
// Prepare for stack activity.
@ -436,7 +437,7 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
Access(captured_status_); // ns
// Do the interrupt cycle, to obtain a vector.
temporary_address_.l = uint32_t(captured_interrupt_level_);
temporary_address_.l = 0xffff'fff8 | uint32_t(captured_interrupt_level_);
SetupDataAccess(0, Microcycle::InterruptAcknowledge);
SetDataAddress(temporary_address_.l);
Access(temporary_value_.low); // ni
@ -462,7 +463,7 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
SetupDataAccess(Microcycle::Read, Microcycle::SelectWord);
SetDataAddress(temporary_address_.l);
temporary_address_.l <<= 2;
temporary_address_.l = uint32_t(temporary_value_.w << 2);
Access(program_counter_.high); // nV
temporary_address_.l += 2;
@ -2279,7 +2280,9 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
#define TODOState(x) \
BeginState(x): [[fallthrough]];
TODOState(BusOrAddressErrorException);
BeginState(BusOrAddressErrorException):
assert(false);
MoveToStateSpecific(Decode);
#undef TODOState