daveh@cbmvax.UUCP (Dave Haynie) (05/18/89)
in article <5853@cs.Buffalo.EDU>, ugkamins@sunybcs.uucp (John Kaminski) says: > Quote: I hate long references lists. > Also, consider that the PC and the PC XT had no standard real time clock, > and all those dates and times in the directory listing are derived from the > user entering the date/time at boot time and that aforemetioned (sp?) interrupt > clock. That's pretty standard. Most RTC clocks are, at best, quirky. They often take long times to read, vs. normal I/O ports, and some actually lose time when read. Most systems I've encountered, including PClones, Amigas, even C64s, have an interrupt-based system clock that's set on powerup from an RTC if one exists. This also has the advantage of making it possible to deliver a working system with no RTC. The RTC function is handy, but optional. The system's knowledge of real and elapsed time is usually critical -- even the C64 needed this. -- Dave Haynie "The 32 Bit Guy" Commodore-Amiga "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: D-DAVE H BIX: hazy Amiga -- It's not just a job, it's an obsession