static CPU_SET_INFO( nec )
{
nec_state_t *nec_state = get_safe_token(device);
switch (state)
{
/* --- the following bits of info are set as 64-bit signed integers --- */
case CPUINFO_INT_INPUT_STATE + 0: set_irq_line(nec_state, 0, info->i); break;
case CPUINFO_INT_INPUT_STATE + INPUT_LINE_NMI: set_irq_line(nec_state, INPUT_LINE_NMI, info->i); break;
case CPUINFO_INT_INPUT_STATE + NEC_INPUT_LINE_POLL: set_irq_line(nec_state, NEC_INPUT_LINE_POLL, info->i); break;
case CPUINFO_INT_PC:
case CPUINFO_INT_REGISTER + NEC_PC:
if( info->i - (Sreg(PS)<<4) < 0x10000 )
{
nec_state->ip = info->i - (Sreg(PS)<<4);
}
else
{
Sreg(PS) = info->i >> 4;
nec_state->ip = info->i & 0x0000f;
}
break;
case CPUINFO_INT_REGISTER + NEC_IP: nec_state->ip = info->i; break;
case CPUINFO_INT_SP:
if( info->i - (Sreg(SS)<<4) < 0x10000 )
{
Wreg(SP) = info->i - (Sreg(SS)<<4);
}
else
{
Sreg(SS) = info->i >> 4;
Wreg(SP) = info->i & 0x0000f;
}
break;
case CPUINFO_INT_REGISTER + NEC_SP: Wreg(SP) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_FLAGS: ExpandFlags(info->i); break;
case CPUINFO_INT_REGISTER + NEC_AW: Wreg(AW) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_CW: Wreg(CW) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_DW: Wreg(DW) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_BW: Wreg(BW) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_BP: Wreg(BP) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_IX: Wreg(IX) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_IY: Wreg(IY) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_ES: Sreg(DS1) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_CS: Sreg(PS) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_SS: Sreg(SS) = info->i; break;
case CPUINFO_INT_REGISTER + NEC_DS: Sreg(DS0) = info->i; break;
}
}
static void i80286_load_flags(i8086_state *cpustate, UINT16 flags, int cpl)
{
cpustate->flags = CompressFlags();
if(PM && cpl) {
UINT16 mask = 0x3000;
if(cpl>IOPL) mask |= 0x200;
flags &= ~mask;
flags |= (cpustate->flags & mask);
}
else if(!PM) (flags &= ~0xf000);
ExpandFlags(flags);
cpustate->flags = flags;
if (cpustate->TF) PREFIX(_trap)(cpustate);
/* if the IF is set, and an interrupt is pending, signal an interrupt */
if (cpustate->IF && cpustate->irq_state)
i80286_interrupt_descriptor(cpustate, (*cpustate->irq_callback)(cpustate->device, 0), 2, -1);
}
void nec_common_device::state_import(const device_state_entry &entry)
{
switch (entry.index())
{
case NEC_PC:
if( m_debugger_temp - (Sreg(PS)<<4) < 0x10000 )
{
m_ip = m_debugger_temp - (Sreg(PS)<<4);
}
else
{
Sreg(PS) = m_debugger_temp >> 4;
m_ip = m_debugger_temp & 0x0000f;
}
break;
case NEC_FLAGS:
ExpandFlags(m_debugger_temp);
break;
}
}
static void PREFIX286(_0fpre)(i8086_state *cpustate)
{
unsigned next = FETCHOP;
UINT16 ModRM, desc[3];
UINT16 tmp, msw, sel;
UINT8 r;
UINT32 addr;
switch (next) {
case 0:
if (!PM) throw TRAP(ILLEGAL_INSTRUCTION,-1);
ModRM=FETCHOP;
switch (ModRM&0x38) {
case 0: /* sldt */
PutRMWord(ModRM, cpustate->ldtr.sel);
break;
case 8: /* str */
PutRMWord(ModRM, cpustate->tr.sel);
break;
case 0x10: /* lldt */
if (CPL!=0) throw TRAP(GENERAL_PROTECTION_FAULT,0);
sel=GetRMWord(ModRM);
if (TBL(sel)) throw TRAP(GENERAL_PROTECTION_FAULT,IDXTBL(sel));
if (IDXTBL(sel)) {
if (IDX(sel)>=cpustate->gdtr.limit) throw TRAP(GENERAL_PROTECTION_FAULT,IDXTBL(sel));
addr = cpustate->gdtr.base + IDX(sel);
desc[0] = ReadWord(addr);
desc[1] = ReadWord(addr+2);
desc[2] = ReadWord(addr+4);
r = RIGHTS(desc);
if (SEGDESC(r) || (GATE(r) != LDTDESC)) throw TRAP(GENERAL_PROTECTION_FAULT,IDXTBL(sel));
if (!PRES(r)) throw TRAP(SEG_NOT_PRESENT,IDXTBL(sel));
} else {
desc[0] = 0;
desc[1] = 0;
desc[2] = 0;
}
cpustate->ldtr.sel=sel;
cpustate->ldtr.limit=LIMIT(desc);
cpustate->ldtr.base=BASE(desc);
cpustate->ldtr.rights=RIGHTS(desc);
break;
case 0x18: /* ltr */
if (CPL!=0) throw TRAP(GENERAL_PROTECTION_FAULT,0);
sel=GetRMWord(ModRM);
if ((addr = i80286_selector_address(cpustate,sel)) == -1) throw TRAP(GENERAL_PROTECTION_FAULT,IDXTBL(sel));
desc[0] = ReadWord(addr);
desc[1] = ReadWord(addr+2);
desc[2] = ReadWord(addr+4);
r = RIGHTS(desc);
if (SEGDESC(r) || (GATE(r) != TSSDESCIDLE)) throw TRAP(GENERAL_PROTECTION_FAULT,IDXTBL(sel));
if (!PRES(r)) throw TRAP(SEG_NOT_PRESENT,IDXTBL(sel));
desc[2] |= 0x200; // mark busy
WriteWord(addr+4, desc[2]);
cpustate->tr.sel=sel;
cpustate->tr.limit=LIMIT(desc);
cpustate->tr.base=BASE(desc);
cpustate->tr.rights=RIGHTS(desc);
break;
case 0x20: /* verr */
tmp=GetRMWord(ModRM);
if ((addr = i80286_selector_address(cpustate,tmp)) == -1) cpustate->ZeroVal = 1;
else {
desc[2] = ReadWord(addr+4);
r = RIGHTS(desc);
cpustate->ZeroVal = i80286_verify(cpustate, tmp, I80286_READ, RIGHTS(desc), 0);
cpustate->ZeroVal = cpustate->ZeroVal || (CODE(r) && CONF(r) ? 0 : (DPL(r)<PMAX(RPL(tmp),CPL)));
}
break;
case 0x28: /* verw */
tmp=GetRMWord(ModRM);
if ((addr = i80286_selector_address(cpustate,tmp)) == -1) cpustate->ZeroVal = 1;
else {
desc[2] = ReadWord(addr+4);
r = RIGHTS(desc);
cpustate->ZeroVal = i80286_verify(cpustate, tmp, I80286_WRITE, RIGHTS(desc), 0);
cpustate->ZeroVal = cpustate->ZeroVal || (DPL(r)<PMAX(RPL(tmp),CPL));
}
break;
default:
throw TRAP(ILLEGAL_INSTRUCTION,-1);
break;
}
break;
case 1:
/* lgdt, lldt in protected mode privilege level 0 required else common protection
failure 0xd */
ModRM = FETCHOP;
switch (ModRM&0x38) {
case 0: /* sgdt */
PutRMWord(ModRM,cpustate->gdtr.limit);
PutRMWordOffset(2,cpustate->gdtr.base&0xffff);
PutRMWordOffset(4,0xff00|cpustate->gdtr.base>>16);
break;
case 8: /* sidt */
PutRMWord(ModRM,cpustate->idtr.limit);
PutRMWordOffset(2,cpustate->idtr.base&0xffff);
PutRMWordOffset(4,0xff00|cpustate->idtr.base>>16);
break;
case 0x10: /* lgdt */
if (PM&&(CPL!=0)) throw TRAP(GENERAL_PROTECTION_FAULT,0);
cpustate->gdtr.limit=GetRMWord(ModRM);
cpustate->gdtr.base=GetRMWordOffset(2)|(GetRMByteOffset(4)<<16);
break;
case 0x18: /* lidt */
if (PM&&(CPL!=0)) throw TRAP(GENERAL_PROTECTION_FAULT,0);
cpustate->idtr.limit=GetRMWord(ModRM);
cpustate->idtr.base=GetRMWordOffset(2)|(GetRMByteOffset(4)<<16);
break;
case 0x20: /* smsw */
PutRMWord(ModRM, cpustate->msw);
break;
case 0x30: /* lmsw */
if (PM&&(CPL!=0)) throw TRAP(GENERAL_PROTECTION_FAULT,0);
msw = GetRMWord(ModRM);
if (!PM&&(msw&1)) cpustate->sregs[CS] = IDX(cpustate->sregs[CS]); // cheat and set cpl to 0
cpustate->msw=(cpustate->msw&1)|msw;
break;
default:
throw TRAP(ILLEGAL_INSTRUCTION,-1);
break;
}
break;
case 2: /* LAR */
if (!PM) throw TRAP(ILLEGAL_INSTRUCTION,-1);
ModRM = FETCHOP;
tmp=GetRMWord(ModRM);
if ((addr = i80286_selector_address(cpustate,tmp)) == -1) cpustate->ZeroVal = 1;
else {
desc[2] = ReadWord(addr+4);
r = RIGHTS(desc);
if (DPL(r)>=PMAX(RPL(tmp),CPL)) {
cpustate->ZeroVal = 0;
// rights are expected to be in upper byte
RegWord(ModRM) = r << 8;
}
else
cpustate->ZeroVal = 1;
}
break;
case 3: /* LSL */
if (!PM) throw TRAP(ILLEGAL_INSTRUCTION,-1);
ModRM = FETCHOP;
tmp=GetRMWord(ModRM);
if ((addr = i80286_selector_address(cpustate,tmp)) == -1) cpustate->ZeroVal = 1;
else {
desc[2] = ReadWord(addr+4);
r = RIGHTS(desc);
if (!SEGDESC(r) && (GATE(r) >= CALLGATE)) cpustate->ZeroVal = 1; // not valid for gates
else if (DPL(r)>=PMAX(RPL(tmp),CPL)) {
cpustate->ZeroVal = 0;
RegWord(ModRM) = ReadWord(addr);
}
else
cpustate->ZeroVal = 1;
}
break;
case 5: /* loadall */
if (PM&&(CPL!=0)) throw TRAP(GENERAL_PROTECTION_FAULT,0);
cpustate->msw = (cpustate->msw&1)|ReadWord(0x806);
cpustate->tr.sel = ReadWord(0x816);
tmp = ReadWord(0x818);
ExpandFlags(tmp);
cpustate->flags = tmp;
cpustate->flags = CompressFlags();
cpustate->pc = ReadWord(0x81a);
cpustate->ldtr.sel = ReadWord(0x81c);
cpustate->sregs[DS] = ReadWord(0x81e);
cpustate->sregs[SS] = ReadWord(0x820);
cpustate->sregs[CS] = ReadWord(0x822);
cpustate->sregs[ES] = ReadWord(0x824);
cpustate->regs.w[DI] = ReadWord(0x826);
cpustate->regs.w[SI] = ReadWord(0x828);
cpustate->regs.w[BP] = ReadWord(0x82a);
cpustate->regs.w[SP] = ReadWord(0x82c);
cpustate->regs.w[BX] = ReadWord(0x82e);
cpustate->regs.w[DX] = ReadWord(0x830);
cpustate->regs.w[CX] = ReadWord(0x832);
cpustate->regs.w[AX] = ReadWord(0x834);
// loadall uses base-rights-limit order
#define LOADDESC(addr, sreg) { desc[1] = ReadWord(addr); desc[2] = ReadWord(addr+2); desc[0] = ReadWord(addr+4); \
cpustate->base[sreg] = BASE(desc); cpustate->rights[sreg] = RIGHTS(desc); \
cpustate->limit[sreg] = LIMIT(desc); }
LOADDESC(0x836, ES);
LOADDESC(0x83C, CS);
LOADDESC(0x842, SS);
LOADDESC(0x848, DS);
#undef LOADDESC
// void cast supresses warning
#define LOADDESC(addr, reg, r) { desc[1] = ReadWord(addr); desc[2] = ReadWord(addr+2); desc[0] = ReadWord(addr+4); \
cpustate->reg.base = BASE(desc); (void)(r); cpustate->reg.limit = LIMIT(desc); }
LOADDESC(0x84e, gdtr, 1);
LOADDESC(0x854, ldtr, cpustate->ldtr.rights = RIGHTS(desc));
LOADDESC(0x85a, idtr, 1);
LOADDESC(0x860, tr, cpustate->tr.rights = RIGHTS(desc));
#undef LOADDESC
cpustate->pc = (cpustate->pc + cpustate->base[CS]) & AMASK;
CHANGE_PC(cpustate->pc);
break;
case 6: /* clts */
if (PM&&(CPL!=0)) throw TRAP(GENERAL_PROTECTION_FAULT,0);
cpustate->msw&=~8;
break;
default:
throw TRAP(ILLEGAL_INSTRUCTION,-1);
break;
}
}
