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Adds PHD, PHK and 8-bit PHP and PLP.

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This commit is contained in:
Thomas Harte 2020-10-07 20:13:12 -04:00
parent b608e11965
commit b510b9d337
1 changed files with 55 additions and 31 deletions
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86
Processors/65816/Implementation/65816Implementation.hpp
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@ -334,12 +334,64 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
break;
case PLD:
direct_ = (instruction_buffer_.value & 0xff) << 16;
direct_ = instruction_buffer_.value;
flags_.set_nz(instruction_buffer_.value);
break;
case PLP:
flags_.set(instruction_buffer_.value);
// The below attempts to obey the 8/16-bit mixed transfer rules
if(!emulation_flag_) {
assert(false); // TODO: M and X.
}
break;
case STA:
data_buffer_.value = a_.full & m_masks_[1];
data_buffer_.size = 2 - m_flag();
break;
case STZ:
data_buffer_.value = 0;
data_buffer_.size = 2 - m_flag();
break;
case STX:
data_buffer_.value = x_.full & x_masks_[1];
data_buffer_.size = 2 - x_flag();
break;
case STY:
data_buffer_.value = y_.full & x_masks_[1];
data_buffer_.size = 2 - m_flag();
break;
case PHB:
data_buffer_.value = data_bank_ >> 16;
data_buffer_.size = 1;
break;
case PHK:
data_buffer_.value = program_bank_ >> 16;
data_buffer_.size = 1;
break;
case PHD:
data_buffer_.value = direct_;
data_buffer_.size = 2;
break;
case PHP:
data_buffer_.value = flags_.get();
if(!emulation_flag_) {
assert(false); // TODO: M and X.
}
break;
case NOP: break;
// The below attempt to obey the 8/16-bit mixed transfer rules
// as documented in https://softpixel.com/~cwright/sianse/docs/65816NFO.HTM
// (and makes reasonable guesses as to the N flag)
@ -383,33 +435,6 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
break;
case STA:
data_buffer_.value = a_.full & m_masks_[1];
data_buffer_.size = 2 - m_flag();
break;
case STZ:
data_buffer_.value = 0;
data_buffer_.size = 2 - m_flag();
break;
case STX:
data_buffer_.value = x_.full & x_masks_[1];
data_buffer_.size = 2 - x_flag();
break;
case STY:
data_buffer_.value = y_.full & x_masks_[1];
data_buffer_.size = 2 - m_flag();
break;
case PHB:
data_buffer_.value = a_.halves.high;
data_buffer_.size = 1;
break;
case NOP: break;
//
// Jumps.
//
@ -648,8 +673,7 @@ template <typename BusHandler> void Processor<BusHandler>::run_for(const Cycles
} break;
// TODO:
// PLP,
// PHP, PHD, PHK,
// PHK,
// TRB, TSB,
// REP, SEP,
// XCE, XBA,