minix/include/ibm/ports.h
2005-04-21 14:53:53 +00:00

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C

/* Addresses and magic numbers for miscellaneous ports. */
#ifndef _PORTS_H
#define _PORTS_H
#if (CHIP == INTEL)
/* Miscellaneous ports. */
#define PCR 0x65 /* Planar Control Register */
#define PORT_B 0x61 /* I/O port for 8255 port B (kbd, beeper...) */
#define TIMER0 0x40 /* I/O port for timer channel 0 */
#define TIMER2 0x42 /* I/O port for timer channel 2 */
#define TIMER_MODE 0x43 /* I/O port for timer mode control */
#endif /* (CHIP == INTEL) */
#endif /* _PORTS_H */