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i86, i286: Update m_prev_ip (and therefore CURPC) after taking interrupt (nw)

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This commit is contained in:
AJR 2020-05-03 23:13:09 -04:00
parent 16550d533f
commit e59af6d5e8
2 changed files with 4 additions and 4 deletions
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6
src/devices/cpu/i86/i286.cpp
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@ -769,7 +769,7 @@ void i80286_cpu_device::code_descriptor(uint16_t selector, uint16_t offset, int
m_limit[CS] = LIMIT(desc);
m_base[CS] = BASE(desc);
m_rights[CS] = RIGHTS(desc);
m_ip = offset;
m_prev_ip = m_ip = offset;
}
else
{ // systemdescriptor
@ -862,7 +862,7 @@ void i80286_cpu_device::code_descriptor(uint16_t selector, uint16_t offset, int
}
else
{
m_ip = offset;
m_prev_ip = m_ip = offset;
m_sregs[CS]=selector;
m_base[CS]=selector<<4;
m_rights[CS]=0x93;
@ -979,7 +979,7 @@ void i80286_cpu_device::interrupt_descriptor(int number, int hwint, int error)
m_limit[CS] = LIMIT(gatedesc);
m_base[CS] = BASE(gatedesc);
m_rights[CS] = RIGHTS(gatedesc);
m_ip = GATEOFF(desc);
m_prev_ip = m_ip = GATEOFF(desc);
m_TF = 0;
m_NT = 0;
if(GATE(RIGHTS(desc)) == INTGATE)

2
src/devices/cpu/i86/i86.cpp
View File

@ -595,7 +595,7 @@ void i8086_common_cpu_device::interrupt(int int_num, int trap)
PUSH(m_sregs[CS]);
PUSH(m_ip);
m_ip = dest_off;
m_prev_ip = m_ip = dest_off;
m_sregs[CS] = dest_seg;
}