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stack limit register write fix

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folkert van heusden 2022-04-10 21:11:29 +02:00
parent d7aa353bd7
commit ab1cf139dc
1 changed files with 4 additions and 4 deletions
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8
bus.cpp
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@ -389,12 +389,12 @@ uint16_t bus::write(const uint16_t a, const bool word_mode, uint16_t value, cons
if (a == 0177774 || a == 0177775) { // stack limit register if (a == 0177774 || a == 0177775) { // stack limit register
D(fprintf(stderr, "writeb Set stack limit register: %o\n", value);) D(fprintf(stderr, "writeb Set stack limit register: %o\n", value);)
uint16_t v = c -> getStackLimitRegister(); uint16_t v = c -> getStackLimitRegister();
if (a & 1) if (a & 1)
v = (v & 0xff00) | value;
else
v = (v & 0x00ff) | (value << 8); v = (v & 0x00ff) | (value << 8);
else
v = (v & 0xff00) | value;
c -> setStackLimitRegister(v); c -> setStackLimitRegister(v);
return v; return v;
@ -403,7 +403,7 @@ uint16_t bus::write(const uint16_t a, const bool word_mode, uint16_t value, cons
else { else {
if (a == 0177776) { // PSW if (a == 0177776) { // PSW
D(fprintf(stderr, "write PSW %o\n", value);) D(fprintf(stderr, "write PSW %o\n", value);)
c -> setPSW(value, false); c -> setPSW(value, false);
return value; return value;
} }