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https://github.com/TomHarte/CLK.git
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Add enough of state to [sort-of] pass the first test.
i.e. until the processor overruns, as it is permitted to do, and can't handle the second instruction.
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@ -306,8 +306,8 @@ void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perfor
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void ProcessorBase::did_update_status() {
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void ProcessorBase::did_update_status() {
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// Shuffle the stack pointers.
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// Shuffle the stack pointers.
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stack_pointers_[is_supervisor_] = registers_[7];
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stack_pointers_[is_supervisor_] = registers_[15];
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registers_[7] = stack_pointers_[int(status_.is_supervisor)];
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registers_[15] = stack_pointers_[int(status_.is_supervisor)];
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is_supervisor_ = int(status_.is_supervisor);
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is_supervisor_ = int(status_.is_supervisor);
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}
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}
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@ -315,11 +315,45 @@ void ProcessorBase::did_update_status() {
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template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool signal_will_perform>
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template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool signal_will_perform>
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CPU::MC68000Mk2::State Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::get_state() {
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CPU::MC68000Mk2::State Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::get_state() {
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return CPU::MC68000Mk2::State();
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CPU::MC68000Mk2::State state;
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// This isn't true, but will ensure that both stack_pointers_ have their proper values.
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did_update_status();
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for(int c = 0; c < 7; c++) {
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state.registers.data[c] = registers_[c].l;
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state.registers.address[c] = registers_[c + 8].l;
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}
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state.registers.data[7] = registers_[7].l;
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state.registers.program_counter = program_counter_.l;
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state.registers.status = status_.status();
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state.registers.user_stack_pointer = stack_pointers_[0].l;
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state.registers.supervisor_stack_pointer = stack_pointers_[1].l;
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return state;
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}
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}
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template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool signal_will_perform>
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template <class BusHandler, bool dtack_is_implicit, bool permit_overrun, bool signal_will_perform>
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void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::set_state(const CPU::MC68000Mk2::State &) {
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void Processor<BusHandler, dtack_is_implicit, permit_overrun, signal_will_perform>::set_state(const CPU::MC68000Mk2::State &state) {
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// Copy registers and the program counter.
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for(int c = 0; c < 7; c++) {
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registers_[c].l = state.registers.data[c];
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registers_[c + 8].l = state.registers.address[c];
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}
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registers_[7].l = state.registers.data[7];
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program_counter_.l = state.registers.program_counter;
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// Set status first in order to get the proper is-supervisor flag in place.
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status_.set_status(state.registers.status);
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// Update stack pointers, being careful to copy the right one.
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stack_pointers_[0].l = state.registers.user_stack_pointer;
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stack_pointers_[1].l = state.registers.supervisor_stack_pointer;
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registers_[15] = stack_pointers_[is_supervisor_];
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// Ensure the local is-supervisor flag is updated.
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did_update_status();
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}
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}
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