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Fixed SGDT/SIDT on 286, Windows 3.0 detects CPU correctly again.

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This commit is contained in:
TomW 2014-09-05 21:40:21 +01:00
commit 20581186b9
2 changed files with 23 additions and 12 deletions
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21
src/x86_ops_pmode.h
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@ -281,7 +281,7 @@ static inline op0F00_a32(uint32_t fetchdat)
return 0;
}
static inline op0F01_common(uint32_t fetchdat, int is32)
static inline op0F01_common(uint32_t fetchdat, int is32, int is286)
{
uint32_t base;
uint16_t limit, tempw;
@ -291,12 +291,16 @@ static inline op0F01_common(uint32_t fetchdat, int is32)
case 0x00: /*SGDT*/
seteaw(gdt.limit);
base = is32 ? gdt.base : (gdt.base & 0xffffff);
if (is286)
base |= 0xff000000;
writememl(easeg, eaaddr + 2, base);
cycles -= 7;
break;
case 0x08: /*SIDT*/
seteaw(idt.limit);
base = is32 ? idt.base : (idt.base & 0xffffff);
if (is286)
base |= 0xff000000;
writememl(easeg, eaaddr + 2, base);
cycles -= 7;
break;
@ -377,28 +381,35 @@ static inline op0F01_w_a16(uint32_t fetchdat)
{
fetch_ea_16(fetchdat);
op0F01_common(fetchdat, 0);
op0F01_common(fetchdat, 0, 0);
return 0;
}
static inline op0F01_w_a32(uint32_t fetchdat)
{
fetch_ea_32(fetchdat);
op0F01_common(fetchdat, 0);
op0F01_common(fetchdat, 0, 0);
return 0;
}
static inline op0F01_l_a16(uint32_t fetchdat)
{
fetch_ea_16(fetchdat);
op0F01_common(fetchdat, 1);
op0F01_common(fetchdat, 1, 0);
return 0;
}
static inline op0F01_l_a32(uint32_t fetchdat)
{
fetch_ea_32(fetchdat);
op0F01_common(fetchdat, 1);
op0F01_common(fetchdat, 1, 0);
return 0;
}
static inline op0F01_286(uint32_t fetchdat)
{
fetch_ea_16(fetchdat);
op0F01_common(fetchdat, 0, 1);
return 0;
}