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C/C++ Source or Header  |  1991-08-05  |  281 b   |  12 lines
  1. /* inportb.c --- p 519 */
  2. #include <stdio.h>
  3. #include <dos.h>
  4. #define PORT_8259   0x21
  5. main()
  6. {
  7.     int int_ack_status;
  8.                         /* Read 8259's status */
  9.     int_ack_status = inportb(PORT_8259);
  10.     printf("Current contents of register at port 21h: %x\n",
  11.                             int_ack_status);
  12. }