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PSW set fix for limited mode (! kernel) / ASRB flag fix

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folkert van heusden 2024-04-04 21:19:44 +02:00
parent d737841ffd
commit 90d98f4330
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 4 additions and 4 deletions
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8
cpu.cpp
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@ -279,10 +279,10 @@ void cpu::setPSW(const uint16_t v, const bool limited)
{ {
if (limited) { if (limited) {
// cannot replace the run-mode bits nor the set of registers // cannot replace the run-mode bits nor the set of registers
psw = (psw & 0177400) | (v & 0377); psw = (psw & 0177400) | (v & 037777);
} }
else { else {
psw = v & 0174377; // mask off 'unused' bits (8-10) psw = v;
} }
} }
@ -1199,7 +1199,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
setRegister(dst_reg, v); setRegister(dst_reg, v);
setPSW_n(SIGN(v, word_mode)); setPSW_n(SIGN(v, word_mode));
setPSW_z(IS_0(v, wm_word)); setPSW_z(IS_0(v, word_mode));
setPSW_v(getPSW_n() ^ getPSW_c()); setPSW_v(getPSW_n() ^ getPSW_c());
} }
else { else {
@ -1222,7 +1222,7 @@ bool cpu::single_operand_instructions(const uint16_t instr)
if (set_flags) { if (set_flags) {
setPSW_n(SIGN(v, word_mode)); setPSW_n(SIGN(v, word_mode));
setPSW_z(IS_0(v, wm_word)); setPSW_z(IS_0(v, word_mode));
setPSW_v(getPSW_n() ^ getPSW_c()); setPSW_v(getPSW_n() ^ getPSW_c());
} }
} }