g_8253.c

来自「操作系统实验教程核心技术与编程实例书中地例子代码」· C语言 代码 · 共 39 行

#include<\tc\include\stdio.h>
#include<\tc\include\dos.h>
#define INTERRUPT 0x08
void far gsch();
void ggret();/*include in \tc\g\include\gint8.c*/
int far pp1();/*include in \tc\g\include\user_1.c*/
void interrupt gint8();/*include in \tc\g\include\gint8.c*/
void (interrupt * oldhandler)();
union  REGS inregs,outregs;
struct SREGS segs;
int gsch_off,gsch_seg,time_sch,time_count;
int r_flag,r_ax,r_bx,r_cx,r_dx,r_si,r_di,r_bp,r_ds,r_es,r_sp,r_ss,r_ip,r_cs;
char far *indos;
#include<\tc\g\include\user_1.c>
#include<\tc\g\include\gint8.c>
main()
  {
    clrscr();
    time_sch=0;
    time_count=40;
    gsch_off=FP_OFF(&gsch);
    gsch_seg=FP_SEG(&gsch);
    oldhandler=getvect(INTERRUPT);
    setvect(INTERRUPT,gint8);
    asm mov al,34h
    asm out 43h,al
    asm mov bx,11932
    asm mov al,bl
    asm out 40h,al
    asm mov al,bh
    asm out 40h,al
    pp1();
    ggret();
  }
void far gsch()
 {  
    ggret();
 }