I286FN v30shift_ea8_data8(void) { // C0: shift EA8, DATA8
UINT8 *out;
UINT op;
UINT32 madr;
REG8 cl;
GET_PCBYTE(op)
if (op >= 0xc0) {
I286_WORKCLOCK(5);
out = REG8_B20(op);
}
else {
I286_WORKCLOCK(8);
madr = CALC_EA(op);
if (madr >= I286_MEMWRITEMAX) {
GET_PCBYTE(cl)
I286_WORKCLOCK(cl);
if (!(op & 0x20)) { // rotate
if (!(op & 0x10)) {
cl = rotatebase16[cl];
}
else { // rotate with carry
cl = rotatebase09[cl];
}
}
else {
cl = max(cl, 9);
}
sft_e8cl_table[(op >> 3) & 7](madr, cl);
return;
}
out = mem + madr;
}
I286_F6 _dec_ea8(UINT op) {
UINT32 madr;
UINT8 *out;
REG8 res;
if (op >= 0xc0) {
I286_WORKCLOCK(2);
out = REG8_B20(op);
}
else {
I286_WORKCLOCK(7);
madr = CALC_EA(op);
if (madr >= I286_MEMWRITEMAX) {
res = i286_memoryread(madr);
DECBYTE(res)
i286_memorywrite(madr, res);
return;
}
out = mem + madr;
}
res = *out;
DECBYTE(res)
*out = (UINT8)res;
}
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 _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 v30_popf(void) { // 9D: popf
I286_WORKCLOCK(5);
REGPOP0(I286_FLAG)
I286_FLAG |= 0xf000;
I286_OV = I286_FLAG & O_FLAG;
I286_FLAG &= (0xfff ^ O_FLAG);
I286_TRAP = ((I286_FLAG & 0x300) == 0x300);
I286IRQCHECKTERM
}
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;
}
}
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 _jmp_far_ea16(UINT op) {
UINT32 seg;
UINT ad;
I286_WORKCLOCK(11);
if (op < 0xc0) {
ad = GET_EA(op, &seg);
I286_IP = i286_memoryread_w(seg + ad);
I286_CS = i286_memoryread_w(seg + LOW16(ad + 2));
CS_BASE = SEGSELECT(I286_CS);
}
else {
INT_NUM(6, I286_IP - 2);
}
}
I286FN v30_reserved(void) {
I286_WORKCLOCK(2);
}