//#include <windows.h>
#include <stdio.h>
#include <conio.h>

int main()
{
    short *ptr;                          //20位指针
    ptr=(short *)0x00400000;               //(0040:0000) BIOS中串口通信的端口地址
    printf("COM1:%04X\n",*ptr);
    printf("COM2:%04X\n",*(ptr+1));
    printf("COM3:%04X\n",*(ptr+2));
    printf("COM4:%04X\n",*(ptr+3));
    
    return 0;
}