I286_F6 _dec_ea16(UINT op) {
UINT32 madr;
UINT16 *out;
REG16 res;
if (op >= 0xc0) {
I286_WORKCLOCK(2);
out = REG16_B20(op);
}
else {
I286_WORKCLOCK(7);
madr = CALC_EA(op);
if (INHIBIT_WORDP(madr)) {
res = i286_memoryread_w(madr);
DECWORD(res)
i286_memorywrite_w(madr, res);
return;
}
out = (UINT16 *)(mem + madr);
}
res = *out;
DECWORD(res)
*out = (UINT16)res;
}
I286_F6 _jmp_ea16(UINT op) {
if (op >= 0xc0) {
I286_WORKCLOCK(7);
I286_IP = *(REG16_B20(op));
}
else {
I286_WORKCLOCK(11);
I286_IP = i286_memoryread_w(CALC_EA(op));
}
}
I286_F6 _pop_ea16(UINT op) {
UINT16 src;
REGPOP0(src);
I286_WORKCLOCK(5);
if (op >= 0xc0) {
*(REG16_B20(op)) = src;
}
else {
i286_memorywrite_w(CALC_EA(op), src);
}
}
I286_F6 _push_ea16(UINT op) {
UINT16 src;
if (op >= 0xc0) {
I286_WORKCLOCK(3);
src = *(REG16_B20(op));
}
else {
I286_WORKCLOCK(5);
src = i286_memoryread_w(CALC_EA(op));
}
REGPUSH0(src);
}
I286_F6 _call_ea16(UINT op) {
UINT16 src;
if (op >= 0xc0) {
I286_WORKCLOCK(7);
src = *(REG16_B20(op));
}
else {
I286_WORKCLOCK(11);
src = i286_memoryread_w(CALC_EA(op));
}
REGPUSH0(I286_IP);
I286_IP = src;
}
I286FN v30mov_seg_ea(void) { // 8E: mov segrem, EA
UINT op;
UINT tmp;
UINT16 ipbak;
ipbak = I286_IP;
GET_PCBYTE(op);
if (op >= 0xc0) {
I286_WORKCLOCK(2);
tmp = *(REG16_B20(op));
}
else {
I286_WORKCLOCK(5);
tmp = i286_memoryread_w(CALC_EA(op));
}
switch(op & 0x18) {
case 0x00: // es
I286_ES = (UINT16)tmp;
ES_BASE = tmp << 4;
break;
case 0x08: // cs
I286_CS = (UINT16)tmp;
CS_BASE = tmp << 4;
break;
case 0x10: // ss
I286_SS = (UINT16)tmp;
SS_BASE = tmp << 4;
SS_FIX = SS_BASE;
NEXT_OPCODE
break;
case 0x18: // ds
I286_DS = (UINT16)tmp;
DS_BASE = tmp << 4;
DS_FIX = DS_BASE;
break;
}
}
