source: trunk/minix/include/ibm/ports.h@ 20

Last change on this file since 20 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a

File size: 516 bytes
Line 
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 */
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