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Don't allow setting of an invalid S.

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This commit is contained in:
Thomas Harte
2023-08-07 09:19:20 -04:00
parent 0222dcf5ce
commit 42024c1573
1 changed files with 4 additions and 1 deletions
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5
Processors/65816/Implementation/65816Base.cpp
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@@ -30,7 +30,10 @@ uint16_t ProcessorBase::value_of(Register r) const {
void ProcessorBase::set_value_of(Register r, uint16_t value) { void ProcessorBase::set_value_of(Register r, uint16_t value) {
switch (r) { switch (r) {
case Register::ProgramCounter: registers_.pc = value; break; case Register::ProgramCounter: registers_.pc = value; break;
case Register::StackPointer: registers_.s.full = value; break; case Register::StackPointer:
registers_.s.full = value;
if(registers_.emulation_flag) registers_.s.halves.high = 1;
break;
case Register::Flags: set_flags(uint8_t(value)); break; case Register::Flags: set_flags(uint8_t(value)); break;
case Register::A: registers_.a.full = value; break; case Register::A: registers_.a.full = value; break;
case Register::X: registers_.x.full = value & registers_.x_mask; break; case Register::X: registers_.x.full = value & registers_.x_mask; break;