1991/0703/pc/mem.h (diff list | history)

1991/0703/sys/src/9/pc/mem.h:17,31 – 1991/0705/sys/src/9/pc/mem.h:17,31 (short | long | prev | next)
1991/0625		#define MAXMACH 1 /* max # cpus system can run */
1991/0613		/*
1991/0625		* Time (???) * Clock frequency is 68.3900 HZ
1991/0705		* Time * Clock frequency is ??? HZ
1991/0613		*/
1991/0625		#define HZ (68) /* clock frequency */ #define MS2HZ (1000/HZ) /* millisec per clock tick */ #define TK2SEC(t) ((t)*100/6839) /* ticks to seconds */ #define TK2MS(t) ((((ulong)(t))*100000)/6839) /* ticks to milliseconds */ #define MS2TK(t) ((((ulong)(t))*6839)/100000) /* milliseconds to ticks */
1991/0705		#define HZ (18) /* clock frequency */ #define MS2HZ (54) /* millisec per clock tick */ #define TK2SEC(t) ((t)*10/185) /* ticks to seconds */ #define TK2MS(t) ((((ulong)(t))*10000)/185) /* ticks to milliseconds */ #define MS2TK(t) ((((ulong)(t))*185)/10000) /* milliseconds to ticks */
1991/0613		/*
1991/0625		* Fundamental addresses