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 */ 18