include/arch/i386/ports.h

   1 /* Addresses and magic numbers for miscellaneous ports. */
   2
   3 #ifndef _PORTS_H
   4 #define _PORTS_H
   5
   6 #if (CHIP == INTEL)
   7
   8 /* Miscellaneous ports. */
   9 #define PCR             0x65    /* Planar Control Register */
  10 #define PORT_B          0x61    /* I/O port for 8255 port B (kbd, beeper...) */
  11 #define TIMER0          0x40    /* I/O port for timer channel 0 */
  12 #define TIMER2          0x42    /* I/O port for timer channel 2 */
  13 #define TIMER_MODE      0x43    /* I/O port for timer mode control */
  14
  15 #endif /* (CHIP == INTEL) */
  16
  17 #endif /* _PORTS_H */