C鼠标初始化问题,请教高手！！！

[BEISHUISHILAN]

为什么按照书上或网上说的方法鼠标的状态可以正常读出却无法显示呢？

outportb函数有用么？
/* Note:Your choice is C IDE */
#include <stdio.h>
#include <graphics.h>
#include <io.h>
#include <dos.h>
#include <conio.h>
#define MOUSE_ID 0x33


int mouse_x,mouse_y,mouse_b;
unsigned int pattern[32]={
0x3fff,
0x1fff,
0x0fff,
0x07ff,
0x01ff,
0x00ff,
0x007f,
0x003f,
0x001f,
0x01ff,
0x10ff,
0x30ff,
0xf87f,
0xf87f,
0xfc3f,


0x0000,
0x4000,
0x6000,
0x7000,
0x7800,
0x7c00,
0x7e00,
0x7f80,
0x7fc0,
0x6c00,
0x4600,
0x0600,
0x0300,
0x0300,
0x0180,
};

mouse_read()
{
union REGS oreg,ireg;
int i;
mouse_b=0;
outportb(0x443,0x0e);
ireg.x.ax=3;
int86(0x33,&ireg,&oreg);
mouse_x=oreg.x.cx;
mouse_y=oreg.x.dx;
i=oreg.x.bx;
if(i==0x01)mouse_b=1;
if(i==0x02)mouse_b=2;
if(i==0x03)mouse_b=3;
outportb(0x441,0);
if(mouse_b)
return 1;
else
return mouse_b;

}
set_gr_sursor(int x,int y,unsigned int far*pattern)
{
union REGS regs;
struct SREGS isreg;
regs.x.ax=9;
regs.x.bx=x;
regs.x.cx=y;
regs.x.dx=FP_OFF(pattern);
isreg.es=FP_SEG(pattern);
int86x(MOUSE_ID,®s,®s,&isreg);
outportb(0x441,0);
}

show_mouse()
{
union REGS regs;
outportb(0x443,0x0e);
regs.x.ax=1;
int86(MOUSE_ID,®s,®s);
outportb(0x441,0);
}

main()
{
int graphdriver,graphmode;
graphdriver=VGA;
graphmode=VGAHI;
initgraph(&graphdriver,&graphmode,"");
cleardevice();

set_gr_sursor(mouse_x,mouse_y,pattern) ;
show_mouse();
while(1)
{
mouse_read();
gotoxy(50,25);
printf("x:%-3d,y:%-3d,button:%4d",mouse_x,mouse_y,mouse_b);


}
}

[_石头_]

outportb函数有用么？
----------------------
原型: void outportb(unsigned char port, unsigned char value)
作用：向port端口（i/o端口）输出8bit的数据value

[BEISHUISHILAN]

我知道这个函数的原形及作用，我问的是它在该程序中的作用

[K行天下]

tc的吧

[xiansizhe]

dos.h 中 /* 向指定的接口输出指定的字节 */
void outportb(int port,char byte)
#include <stdio.h>
#include <dos.h>

int main(void)
{
int port = 2; /* 这是指定的字节 */
char value = 'C';

outportb(port, value);
printf("Value %c sent to port number %d\n", value, port);
return 0;
}

[kapaskey]

TC哦