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Add enough of state to [sort-of] pass the first test.

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i.e. until the processor overruns, as it is permitted to do, and can't handle the second instruction.
This commit is contained in:
Thomas Harte 2022-05-17 16:51:26 -04:00
parent 4a40581deb
commit f3d3e588fd
1 changed files with 38 additions and 4 deletions
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42
Processors/68000Mk2/Implementation/68000Mk2Implementation.hpp
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@ -306,8 +306,8 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
void ProcessorBase::did_update_status() {
// Shuffle the stack pointers.
stack_pointers_[is_supervisor_] = registers_[7];
registers_[7] = stack_pointers_[int(status_.is_supervisor)];
stack_pointers_[is_supervisor_] = registers_[15];
registers_[15] = stack_pointers_[int(status_.is_supervisor)];
is_supervisor_ = int(status_.is_supervisor);
}
@ -315,11 +315,45 @@ void ProcessorBase::did_update_status() {
template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool signal_will_perform>
CPU::MC68000Mk2::State Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::get_state() {
return CPU::MC68000Mk2::State();
CPU::MC68000Mk2::State state;
// This isn't true, but will ensure that both stack_pointers_ have their proper values.
did_update_status();
for(int c = 0; c < 7; c++) {
state.registers.data[c] = registers_[c].l;
state.registers.address[c] = registers_[c + 8].l;
}
state.registers.data[7] = registers_[7].l;
state.registers.program_counter = program_counter_.l;
state.registers.status = status_.status();
state.registers.user_stack_pointer = stack_pointers_[0].l;
state.registers.supervisor_stack_pointer = stack_pointers_[1].l;
return state;
}
template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool signal_will_perform>
void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::set_state(const CPU::MC68000Mk2::State &) {
void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::set_state(const CPU::MC68000Mk2::State &state) {
// Copy registers and the program counter.
for(int c = 0; c < 7; c++) {
registers_[c].l = state.registers.data[c];
registers_[c + 8].l = state.registers.address[c];
}
registers_[7].l = state.registers.data[7];
program_counter_.l = state.registers.program_counter;
// Set status first in order to get the proper is-supervisor flag in place.
status_.set_status(state.registers.status);
// Update stack pointers, being careful to copy the right one.
stack_pointers_[0].l = state.registers.user_stack_pointer;
stack_pointers_[1].l = state.registers.supervisor_stack_pointer;
registers_[15] = stack_pointers_[is_supervisor_];
// Ensure the local is-supervisor flag is updated.
did_update_status();
}