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API to read BIOS datetime in Win95

In Windows 95, running certain applications cause OS datetime slower than BIOS datetime. After reboot, OS datetime refreshed and equal to the BIOS datetime again.

I'd like to know if there is any API directly reads the BIOS datetime, therefore a program can be run locally to periodically force OS datetime syn with BIOS datetime?

Kyle Abrahams, PMP

#include <dos.h>

void main()
{
unsigned char hours, sec, min;
int flag;

gettime(&mytime);

if ( running == 0 )
{

running = 1;

hours = mytime.ti_hour;
min = mytime.ti_min;
sec = mytime.ti_sec;

if (hours == 24|| hours==0)
{hours = 12; flag = 0;}

if (hours >12)
{hours -= 12; flag =1;}
}

look in dos.h for settime. Also, gettime may be _gettime or dos_gettime or something like that. It's in dos.h

BeyondWu

In theory, I think you should implement a driver, but because in win9x you can use in/out directly under user mode, so you needn't. You can simply read the RTC with 70/71h ports.

Kyle Abrahams, PMP

errm, sorry my mistake, take out anything to do with running. (Mine was for a TSR at the time.)

tsddb

ASKER

Beyond Wu

Could you tell me more about "read the RTC with 70/71h ports."? "RTC" means "Real Time Clock" and how can I read it?

TSDDB

ASKER CERTIFIED SOLUTION

BeyondWu

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