claunia/86Box
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implement more VPCEXT opcodes

Browse Source
This commit is contained in:
RichardG867
2020-07-26 17:49:12 -03:00
parent 01b6662809
commit a8855733ec
1 changed files with 60 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
src/cpu/386_ops.h
View File

@@ -204,11 +204,15 @@ extern void x386_dynarec_log(const char *fmt, ...);
#include "x86_ops_shift.h"
#include "x86_ops_amd.h"
#include "x86_ops_3dnow.h"
#include <time.h>
static int opVPCEXT(uint32_t fetchdat)
{
uint8_t b1, b2;
uint16_t cent;
time_t now;
struct tm *tm;
if (!is_vpc)
return ILLEGAL(fetchdat);
@@ -222,23 +226,68 @@ static int opVPCEXT(uint32_t fetchdat)
CLOCK_CYCLES(1);
if (b1 == 0x03) {
(void)time(&now);
tm = localtime(&now);
}
if ((b1 == 0x07) && (b2 == 0x0b)) {
EBX = 0x00000000;
EDX = 0x00000003;
switch (EAX) {
case 0x00000000:
EDX = 0x00000003;
break;
case 0x00000001:
EDX = 0x00000012;
break;
case 0x00000002:
case 0x00000003:
case 0x00000004:
case 0x00000005:
EDX = 0x00000001;
break;
case 0x00000007:
EDX = 0x0000009c;
break;
default:
EDX = 0x00000000;
if (EAX > 0x00000012)
cpu_state.flags &= ~(Z_FLAG);
}
} else if ((b1 == 0x03) && (b2 == 0x00)) {
/* TODO: Return host BCD time in DX/CX/AX */
EDX = 0x00000000;
ECX = 0x00000000;
EAX = 0x00000000;
EDX = BCD8(tm->tm_hour);
ECX = BCD8(tm->tm_min);
EAX = BCD8(tm->tm_sec);
} else if ((b1 == 0x03) && (b2 == 0x01)) {
/* TODO: Return host BCD date in DX/CX/AX */
EDX = 0x00000001;
ECX = 0x00000001;
EAX = 0x00001980;
EDX = BCD8(tm->tm_year % 100);
ECX = BCD8(tm->tm_mon + 1);
EAX = BCD8(tm->tm_mday);
cent = (((tm->tm_year - (tm->tm_year % 100)) / 100) % 4);
EBX = ((tm->tm_mday + tm->tm_mon + (tm->tm_year % 100) + cent + 3) % 7);
} else if ((b1 == 0x03) && (b2 == 0x03)) {
EDX = tm->tm_hour;
ECX = tm->tm_min;
EAX = tm->tm_sec;
} else if ((b1 == 0x03) && (b2 == 0x04)) {
EDX = 1900 + tm->tm_year;
ECX = tm->tm_mon + 1;
EBX = tm->tm_mday;
} else if ((b1 == 0x03) && (b2 == 0x05)) {
EBX = 0x0000000F;
ECX = 0x0000000A;
} else if ((b1 == 0x03) && (b2 == 0x06)) {
/* Some kind of timestamp. BX jumps around very quickly, CX not so much. */
EBX = 0x00000000;
ECX = 0x00000000;
} else if ((b1 == 0x03) && (b2 >= 0x07)) {
cpu_state.flags &= ~(Z_FLAG);
} else if ((b1 == 0x0a) && (b2 == 0x00)) {
EAX = mem_size;
} else if ((b1 == 0x11) && (b2 == 0x00))
; /* Do nothing */
EAX = 0x00000000;
else if ((b1 == 0x11) && (b2 == 0x01)) {
EAX = 0x00000000;
cpu_state.flags &= ~(Z_FLAG);