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Improves get/set state.

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This commit is contained in:
Thomas Harte 2019-03-22 19:34:17 -04:00
parent c9c16968bb
commit db0da4b741
1 changed files with 19 additions and 2 deletions
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21
Processors/68000/Implementation/68000Implementation.hpp
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@ -313,7 +313,15 @@ template <class T, bool dtack_is_implicit> ProcessorState Processor<T, dtack_is_
state.user_stack_pointer = stack_pointers_[0].full;
state.supervisor_stack_pointer = stack_pointers_[1].full;
// TODO: status word.
// TODO: rest of status word: interrupt level, trace flag.
state.status =
(carry_flag_ ? 0x0001 : 0x0000) |
(overflow_flag_ ? 0x0002 : 0x0000) |
(zero_flag_ ? 0x0000 : 0x0004) |
(negative_flag_ ? 0x0008 : 0x0000) |
(extend_flag_ ? 0x0010 : 0x0000) |
(is_supervisor_ ? 0x2000 : 0x0000);
return state;
}
@ -324,5 +332,14 @@ template <class T, bool dtack_is_implicit> void Processor<T, dtack_is_implicit>:
stack_pointers_[0].full = state.user_stack_pointer;
stack_pointers_[1].full = state.supervisor_stack_pointer;
// TODO: update address[7], once there's a status word to discern the mode this processor should now be in.
carry_flag_ = state.status & 0x0001;
overflow_flag_ = state.status & 0x0002;
zero_flag_ = (state.status & 0x0004) ^ 0x0004;
negative_flag_ = state.status & 0x0008;
extend_flag_ = state.status & 0x0010;
is_supervisor_ = (state.status >> 13) & 1;
address_[7] = stack_pointers_[is_supervisor_];
// TODO: rest of status word: interrupt level, trace flag.
}