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Merge pull request #6650 from RyogaMasaki/i960_iac_messages

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Add partial support for all IAC messages
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R. Belmont 2020-05-06 11:24:02 -04:00 committed by GitHub
commit 1d51122e38
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1 changed files with 21 additions and 0 deletions
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src/devices/cpu/i960/i960.cpp
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@ -91,6 +91,27 @@ void i960_cpu_device::send_iac(uint32_t adr)
iac[3] = m_program->read_dword(adr+12);
switch(iac[0]>>24) {
case 0x40: // generate irq
break;
case 0x41: // test for pending interrupts
// check_irqs() seems to take care of this
// though it may not be entirely accurate
check_irqs();
break;
case 0x80: // store SAT & PRCB in memory
m_program->write_dword(iac[1], m_SAT);
m_program->write_dword(iac[1]+4, m_PRCB);
break;
case 0x89: // invalidate internal instruction cache
// we do not emulate the instruction cache, so this is safe to ignore
break;
case 0x8F: // enable/disable breakpoints
// processor breakpoints are not emulated, safe to ignore
break;
case 0x91: // stop processor
break;
case 0x92: // continue initialization
break;
case 0x93: // reinit
m_SAT = iac[1];
m_PRCB = iac[2];