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Fixes the interrupt return address.

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This commit is contained in:
Thomas Harte 2019-05-29 20:27:46 -04:00
parent c86fe9ada9
commit b3d2b4cd37
1 changed files with 8 additions and 2 deletions
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10
Processors/68000/Implementation/68000Implementation.hpp
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@ -179,7 +179,6 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
// If an interrupt (TODO: or reset) has finally arrived that will be serviced,
// exit the STOP.
if(bus_interrupt_level_ > interrupt_level_) {
// TODO: schedule interrupt right here.
execution_state_ = ExecutionState::BeginInterrupt;
continue;
}
@ -215,6 +214,9 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
continue;
case ExecutionState::BeginInterrupt:
#ifdef LOG_TRACE
should_log = true;
#endif
active_program_ = nullptr;
active_micro_op_ = interrupt_micro_ops_;
execution_state_ = ExecutionState::Executing;
@ -281,7 +283,7 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
}
#ifdef LOG_TRACE
should_log |= (program_counter_.full - 4) == 0x405350;
should_log |= (program_counter_.full - 4) == 0x405984;
#endif
if(instructions[decoded_instruction_.full].micro_operations) {
@ -1869,6 +1871,10 @@ template <class T, bool dtack_is_implicit, bool signal_will_perform> void Proces
// data strobe to collect the corresponding vector byte.
accepted_interrupt_level_ = interrupt_level_ = bus_interrupt_level_;
effective_address_[0].full = 1 | uint32_t(accepted_interrupt_level_ << 1);
// Recede the program counter to where it would have been were there no
// prefetch; that's where the reading stream should pick up upon RTE.
program_counter_.full -= 4;
break;
case int(MicroOp::Action::PrepareINTVector):