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Flip internal presumption on the BRK flag.

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This commit is contained in:
Thomas Harte 2022-06-23 11:23:00 -04:00
parent 3112376943
commit 5a97c09238
2 changed files with 2 additions and 7 deletions
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2
Processors/6502Esque/Implementation/LazyFlags.hpp
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@ -64,7 +64,7 @@ struct LazyFlags {
} }
uint8_t get() const { uint8_t get() const {
return carry | overflow | (inverse_interrupt ^ Flag::Interrupt) | (negative_result & 0x80) | (zero_result ? 0 : Flag::Zero) | Flag::Always | decimal; return carry | overflow | (inverse_interrupt ^ Flag::Interrupt) | (negative_result & 0x80) | (zero_result ? 0 : Flag::Zero) | Flag::Always | Flag::Break | decimal;
} }
LazyFlags() { LazyFlags() {

7
Processors/65816/Implementation/65816Implementation.hpp
View File

@ -415,7 +415,7 @@ template <typename BusHandler, bool uses_ready_line> void Processor<BusHandler,
case OperationPrepareException: case OperationPrepareException:
data_buffer_.value = uint32_t((registers_.pc << 8) | get_flags()); data_buffer_.value = uint32_t((registers_.pc << 8) | get_flags());
if(registers_.emulation_flag) { if(registers_.emulation_flag) {
if(!exception_is_interrupt_) data_buffer_.value |= Flag::Break; if(exception_is_interrupt_) data_buffer_.value &= ~Flag::Break;
data_buffer_.size = 3; data_buffer_.size = 3;
registers_.data_bank = 0; registers_.data_bank = 0;
++next_op_; ++next_op_;
@ -563,11 +563,6 @@ template <typename BusHandler, bool uses_ready_line> void Processor<BusHandler,
case PHP: case PHP:
data_buffer_.value = get_flags(); data_buffer_.value = get_flags();
data_buffer_.size = 1; data_buffer_.size = 1;
if(registers_.emulation_flag) {
// On the 6502, the break flag is set during a PHP.
data_buffer_.value |= Flag::Break;
}
break; break;
case NOP: break; case NOP: break;