#include<dos.h>
#define Sizeprogram 375 void interrupt (*oldtimer)(); void interrupt newtimer(); static struct SREGS seg; unsigned intsp,intss; unsigned myss,stack; unsigned vseg; int running=0; int m1,m2,m3=0; int (*sub_ptr)(); void on_timer(); void timer_on(); void timer_off();
void on_timer(t,pp); int t; int (*pp)(); { sub_ptr=pp; m1=t; segread(&seg); stack=(Sizeprogram-(seg.ds-seg.cs))*16-300; myss=_SS; oldtimer=getvect(0x1c); }
void timer_on() { m2=0; m3=1; setvect(0x1c,newtimer); } void timer_off() { m3=0; setvect(0x1c,oldtimer); } void interrupt newtimer() { (*oldtimer)(); if(running==0) running=1; disable(); intsp=_SP; intss=_SS; _SP=stack; _SS=myss; enable(); if(m3==1){ if(m2==m1*18){ m2=0; (*sb_ptr)(); } m2+=1; } disable(); _SP=intsp; _SS=intss; enable(); running=0; } }
#include<dos.h> #define TRUE 1 void ptr(); main() { char ch; char *p: p=(char *)ptr; on_timer(t,p); while(TRUE){ ch=getch(); switch(ch){ case '0': timer_off();break; case '1': timer_on();break; case '2': timer_off();brea; default: printf("%c",ch); } } }
void ptr() { union REGS in,out; in.h.al='A'; in.h.ah=14; int86(0x10,&in,&out); }
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