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KKTB: PSW shall not be altered during an RTI

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This commit is contained in:
folkert van heusden 2023-03-25 20:50:56 +01:00
parent 7d5bec2197
commit a571609304
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 4 additions and 9 deletions
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13
cpu.cpp
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@ -238,15 +238,10 @@ int cpu::getPSW_spl() const
void cpu::setPSW(const uint16_t v, const bool limited) void cpu::setPSW(const uint16_t v, const bool limited)
{ {
if (limited) { if (limited)
psw |= v & 0174000; // current & previous mode can only be increased, 11 can only be set psw = (v & 0174037) | (psw & 0174340);
else
psw &= 0174000; // retain upper 5 bit psw = v & 0174377;
psw |= v & ~0174000;
}
else {
psw = v;
}
} }
void cpu::setPSW_flags_nzv(const uint16_t value, const word_mode_t word_mode) void cpu::setPSW_flags_nzv(const uint16_t value, const word_mode_t word_mode)