1 /*
2 * FreeLoader
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include <freeldr.h>
20
21 #define RTC_REGISTER_A 0x0A
22 #define RTC_REG_A_UIP 0x80 /* Update In Progress bit */
23
24 #define BCD_INT(bcd) (((bcd & 0xf0) >> 4) * 10 + (bcd &0x0f))
25
26 static UCHAR
HalpQueryCMOS(UCHAR Reg)27 HalpQueryCMOS(UCHAR Reg)
28 {
29 UCHAR Val;
30 Reg |= 0x80;
31
32 WRITE_PORT_UCHAR((PUCHAR)0x70, Reg);
33 Val = READ_PORT_UCHAR((PUCHAR)0x71);
34 WRITE_PORT_UCHAR((PUCHAR)0x70, 0);
35
36 return(Val);
37 }
38
39 TIMEINFO*
XboxGetTime(VOID)40 XboxGetTime(VOID)
41 {
42 static TIMEINFO TimeInfo;
43
44 while (HalpQueryCMOS (RTC_REGISTER_A) & RTC_REG_A_UIP)
45 {
46 ;
47 }
48
49 TimeInfo.Second = BCD_INT(HalpQueryCMOS(0));
50 TimeInfo.Minute = BCD_INT(HalpQueryCMOS(2));
51 TimeInfo.Hour = BCD_INT(HalpQueryCMOS(4));
52 TimeInfo.Day = BCD_INT(HalpQueryCMOS(7));
53 TimeInfo.Month = BCD_INT(HalpQueryCMOS(8));
54 TimeInfo.Year = BCD_INT(HalpQueryCMOS(9));
55 if (TimeInfo.Year > 80)
56 TimeInfo.Year += 1900;
57 else
58 TimeInfo.Year += 2000;
59
60 return &TimeInfo;
61 }
62
63 /* EOF */
64