timer.c

一个C做的蛇蛇游戏阿

/******************************************/
/*         timer.c of goldenbugs          */
/*                                        */
/*             timercounter               */
/*                                        */
/*           Cat Tom 3.28.2003            */
/******************************************/


#define TIMER 0x1c


int Timercounter=0,Mycounter=0,Beancounter=0;/*counter of snakewalk,rollingstick,twinkling shield,newbean*/
void interrupt ( *oldhandler)();


/*functions for the timer*/
void interrupt newhandler()
{
 Timercounter++;
 Mycounter++;
 Beancounter++;
 oldhandler();
}

void settimer(void interrupt (*IntProc)())
{
 oldhandler=getvect(TIMER);
 disable();
 setvect(TIMER,IntProc);
 enable();
}

void killtimer()
{
 disable();
 setvect(TIMER,oldhandler);
 enable();
}