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Implement Cyrix SMM mode.

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This commit is contained in:
SarahW 2020-11-08 20:46:42 +00:00
commit c0bc163eaf
9 changed files with 690 additions and 109 deletions
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6
src/x86_ops_pmode.h
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@ -165,7 +165,7 @@ static int op0F00_common(uint32_t fetchdat, int ea32)
int dpl, valid, granularity;
uint32_t addr, base, limit;
uint16_t desc, sel;
uint8_t access;
uint8_t access, access2;
// pclog("op0F00 %02X %04X:%04X\n", rmdat & 0x38, CS, pc);
switch (rmdat & 0x38)
@ -198,10 +198,12 @@ static int op0F00_common(uint32_t fetchdat, int ea32)
limit = readmemw(0, addr) + ((readmemb(0, addr + 6) & 0xf) << 16);
base = (readmemw(0, addr + 2)) | (readmemb(0, addr + 4) << 16) | (readmemb(0, addr + 7) << 24);
access = readmemb(0, addr + 5);
access2 = readmemb(0, addr + 6);
granularity = readmemb(0, addr + 6) & 0x80;
if (cpu_state.abrt) return 1;
ldt.limit = limit;
ldt.access = access;
ldt.access2 = access2;
if (granularity)
{
ldt.limit <<= 12;
@ -226,6 +228,7 @@ static int op0F00_common(uint32_t fetchdat, int ea32)
limit = readmemw(0, addr) + ((readmemb(0, addr + 6) & 0xf) << 16);
base = (readmemw(0, addr + 2)) | (readmemb(0, addr + 4) << 16) | (readmemb(0, addr + 7) << 24);
access = readmemb(0, addr + 5);
access2 = readmemb(0, addr + 6);
granularity = readmemb(0, addr + 6) & 0x80;
if (cpu_state.abrt) return 1;
access |= 2;
@ -234,6 +237,7 @@ static int op0F00_common(uint32_t fetchdat, int ea32)
tr.seg = sel;
tr.limit = limit;
tr.access = access;
tr.access2 = access2;
if (granularity)
{
tr.limit <<= 12;