root / lab4 / .minix-src / include / i386 / ports.h @ 13
History | View | Annotate | Download (520 Bytes)
| 1 |
/* Addresses and magic numbers for miscellaneous ports. */
|
|---|---|
| 2 |
|
| 3 |
#ifndef _PORTS_H
|
| 4 |
#define _PORTS_H
|
| 5 |
|
| 6 |
#if defined(__i386__)
|
| 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 /* defined(__i386__) */ |
| 16 |
|
| 17 |
#endif /* _PORTS_H */ |