void v60_device::v60WritePSW(UINT32 newval)
{
/* determine if we need to save / restore the stacks */
int updateStack = 0;
/* if the interrupt state is changing, we definitely need to update */
if ((newval ^ PSW) & 0x10000000)
updateStack = 1;
/* if we are not in interrupt mode and the level is changing, we also must update */
else if (!(PSW & 0x10000000) && ((newval ^ PSW) & 0x03000000))
updateStack = 1;
/* save the previous stack value */
if (updateStack)
v60SaveStack();
/* set the new value and update the flags */
PSW = newval;
_Z = (UINT8)(PSW & 1);
_S = (UINT8)(PSW & 2);
_OV = (UINT8)(PSW & 4);
_CY = (UINT8)(PSW & 8);
/* fetch the new stack value */
if (updateStack)
v60ReloadStack();
}
static UINT32 opSTTASK(v60_state *cpustate)
{
int i;
UINT32 adr;
cpustate->modadd = cpustate->PC + 1;
cpustate->moddim = 2;
cpustate->amlength1 = ReadAM(cpustate);
adr = cpustate->TR;
v60WritePSW(cpustate, v60ReadPSW(cpustate) | 0x10000000);
v60SaveStack(cpustate);
cpustate->program->write_dword_unaligned(adr, cpustate->TKCW);
adr += 4;
if(cpustate->SYCW & 0x100) {
cpustate->program->write_dword_unaligned(adr, cpustate->L0SP);
adr += 4;
}
if(cpustate->SYCW & 0x200) {
cpustate->program->write_dword_unaligned(adr, cpustate->L1SP);
adr += 4;
}
if(cpustate->SYCW & 0x400) {
cpustate->program->write_dword_unaligned(adr, cpustate->L2SP);
adr += 4;
}
if(cpustate->SYCW & 0x800) {
cpustate->program->write_dword_unaligned(adr, cpustate->L3SP);
adr += 4;
}
// 31 registers supported, _not_ 32
for(i = 0; i < 31; i++)
if(cpustate->amout & (1 << i)) {
cpustate->program->write_dword_unaligned(adr, cpustate->reg[i]);
adr += 4;
}
// #### Ignore the virtual addressing crap.
return cpustate->amlength1 + 1;
}
UINT32 opSTTASK(void)
{
int i;
UINT32 adr;
modAdd=PC + 1;
modDim=2;
amLength1 = ReadAM();
adr = TR;
v60WritePSW(v60ReadPSW() | 0x10000000);
v60SaveStack();
MemWrite32(adr, TKCW);
adr += 4;
if(SYCW & 0x100) {
MemWrite32(adr, L0SP);
adr += 4;
}
if(SYCW & 0x200) {
MemWrite32(adr, L1SP);
adr += 4;
}
if(SYCW & 0x400) {
MemWrite32(adr, L2SP);
adr += 4;
}
if(SYCW & 0x800) {
MemWrite32(adr, L3SP);
adr += 4;
}
/* 31 registers supported, _not_ 32 */
for(i=0; i<31; i++)
if(amOut & (1<<i)) {
MemWrite32(adr, v60.reg[i]);
adr += 4;
}
/* #### Ignore the virtual addressing crap. */
return amLength1 + 1;
}