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stack limit register fix (can only change upper 8 bits)

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folkert van heusden 2023-03-24 14:01:53 +01:00
parent 0d639fc65a
commit d0359d510f
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 6 additions and 6 deletions
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12
bus.cpp
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@ -684,14 +684,14 @@ void bus::write(const uint16_t a, const bool word_mode, uint16_t value, const bo
if (a == ADDR_STACKLIM || a == ADDR_STACKLIM + 1) { // stack limit register
DOLOG(debug, true, "writeb Set stack limit register: %o", value);
uint16_t v = c->getStackLimitRegister();
if (a == ADDR_STACKLIM)
v = (v & 0xff00) | value;
else
if (a == ADDR_STACKLIM + 1) {
uint16_t v = c->getStackLimitRegister();
v = (v & 0x00ff) | (value << 8);
c->setStackLimitRegister(v);
c->setStackLimitRegister(v);
}
return;
}
@ -726,7 +726,7 @@ void bus::write(const uint16_t a, const bool word_mode, uint16_t value, const bo
if (a == ADDR_STACKLIM) { // stack limit register
DOLOG(debug, true, "write Set stack limit register: %o", value);
c->setStackLimitRegister(value);
c->setStackLimitRegister(value & 0xff00);
return;
}