/***NOTE: |
This is an interrupt service routine. You can NOT compile this |
program with Test Stack Overflow turned on and get an executable |
file which will operate correctly. */ |
#include <stdio.h> |
#include <dos.h> |
#include <conio.h> |
#define INTR 0X1C /* The clock tick interrupt */ |
void interrupt ( *oldhandler)( void ); |
int count=0; |
void interrupt handler( void ) |
{ |
/* increase the global counter */ |
count++; |
/* call the old routine */ |
oldhandler(); |
} |
int main( void ) |
{ |
/* save the old interrupt vector */ |
oldhandler = getvect(INTR); |
/* install the new interrupt handler */ |
setvect(INTR, handler); |
/* loop until the counter exceeds 20 */ |
while (count < 20) |
printf ( "count is %d\n" ,count); |
/* reset the old interrupt handler */ |
setvect(INTR, oldhandler); |
return 0; |
} |
by: 发表于:2017-08-23 16:25:31 顶(0) | 踩(0) 回复
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