1 /* clock.h 1.2 86/01/05 */ 2 3 #define SECDAY ((unsigned)(24*60*60)) /* seconds per day */ 4 #define SECYR ((unsigned)(365*SECDAY)) /* per common year */ 5 6 #define YRREF 1970 7 #define LEAPYEAR(year) ((year)%4==0) /* good till time becomes negative */ 8 9 /* 10 * Software clock is software interrupt level 8 11 */ 12 #define setsoftclock() mtpr(SIRR, 0x8) 13