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Added prefetch timing approximation for 286/386 CPUs, with configurable memory timing.

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This commit is contained in:
SarahW 2016-11-25 21:32:02 +00:00
commit 1b73963997
33 changed files with 1139 additions and 261 deletions
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8
src/x86_ops_int.h
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@ -1,5 +1,6 @@
static int opINT3(uint32_t fetchdat)
{
int cycles_old = cycles;
if ((cr0 & 1) && (eflags & VM_FLAG) && (IOPL != 3))
{
x86gpf(NULL,0);
@ -7,11 +8,13 @@ static int opINT3(uint32_t fetchdat)
}
x86_int_sw(3);
CLOCK_CYCLES((is486) ? 44 : 59);
PREFETCH_RUN(cycles_old-cycles, 1, -1, 0,0,0,0, 0);
return 1;
}
static int opINT(uint32_t fetchdat)
{
int cycles_old = cycles;
uint8_t temp;
/*if (msw&1) pclog("INT %i %i %i\n",cr0&1,eflags&VM_FLAG,IOPL);*/
@ -55,11 +58,14 @@ static int opINT(uint32_t fetchdat)
}*/
x86_int_sw(temp);
PREFETCH_RUN(cycles_old-cycles, 2, -1, 0,0,0,0, 0);
return 1;
}
static int opINTO(uint32_t fetchdat)
{
int cycles_old = cycles;
if ((cr0 & 1) && (eflags & VM_FLAG) && (IOPL != 3))
{
x86gpf(NULL,0);
@ -69,9 +75,11 @@ static int opINTO(uint32_t fetchdat)
{
cpu_state.oldpc = cpu_state.pc;
x86_int_sw(4);
PREFETCH_RUN(cycles_old-cycles, 1, -1, 0,0,0,0, 0);
return 1;
}
CLOCK_CYCLES(3);
PREFETCH_RUN(3, 1, -1, 0,0,0,0, 0);
return 0;
}