#include <freeldr.h>

Include dependency graph for xboxrtc.c:

Macros
#define	RTC_REGISTER_A 0x0A

#define	RTC_REG_A_UIP 0x80 /* Update In Progress bit */

#define	BCD_INT(bcd) (((bcd & 0xf0) >> 4) * 10 + (bcd &0x0f))

Functions
static UCHAR	HalpQueryCMOS (UCHAR Reg)

TIMEINFO *	XboxGetTime (VOID)

Macro Definition Documentation

◆ BCD_INT

#define BCD_INT ( bcd ) (((bcd & 0xf0) >> 4) * 10 + (bcd &0x0f))

Definition at line 24 of file xboxrtc.c.

◆ RTC_REG_A_UIP

#define RTC_REG_A_UIP 0x80 /* Update In Progress bit */

Definition at line 22 of file xboxrtc.c.

◆ RTC_REGISTER_A

#define RTC_REGISTER_A 0x0A

Definition at line 21 of file xboxrtc.c.

Function Documentation

◆ HalpQueryCMOS()

static UCHAR HalpQueryCMOS ( UCHAR Reg )

static

Definition at line 27 of file xboxrtc.c.

{
  UCHAR Val;
  Reg |= 0x80;
 
  WRITE_PORT_UCHAR((PUCHAR)0x70, Reg);
  Val = READ_PORT_UCHAR((PUCHAR)0x71);
  WRITE_PORT_UCHAR((PUCHAR)0x70, 0);
 
  return(Val);
}

Referenced by XboxGetTime().

◆ XboxGetTime()

TIMEINFO * XboxGetTime ( VOID )

Definition at line 40 of file xboxrtc.c.

{
    static TIMEINFO TimeInfo;
 
    while (HalpQueryCMOS (RTC_REGISTER_A) & RTC_REG_A_UIP)
    {
        ;
    }
 
    TimeInfo.Second = BCD_INT(HalpQueryCMOS(0));
    TimeInfo.Minute = BCD_INT(HalpQueryCMOS(2));
    TimeInfo.Hour = BCD_INT(HalpQueryCMOS(4));
    TimeInfo.Day = BCD_INT(HalpQueryCMOS(7));
    TimeInfo.Month = BCD_INT(HalpQueryCMOS(8));
    TimeInfo.Year = BCD_INT(HalpQueryCMOS(9));
    if (TimeInfo.Year > 80)
        TimeInfo.Year += 1900;
    else
        TimeInfo.Year += 2000;
 
    return &TimeInfo;
}

Referenced by MachInit().

Macros