how@SU-ISL.ARPA (08/13/85)
(please excuse multiple postings, having difficulty from here...) you asked, I have a question about the IBM BIOS Timer routine: Do any programs out there care if the timer value returned from the BIOS doesn't match the time-of-day value returned by the MS-DOS "get time of day" function call? In writing my own CLOCK$ device driver, I am keeping time independently of the BIOS and the external 8255. If, for example, the BIOS time counter runs slow because of missing the 55ms ticks, but the time reported by MS-DOS stays accurate, will that throw anybody off? If you know of programs which compute time-of-day directly from the BIOS instead of going through DOS, or know of other considerations here, please answer this in net mail -- I'll post a summary if it's interesting. Thanks, as they say, in advance... -- Allan Pratt two years ago i wrote a new clock driver for my pc and used it until i recently sold it. i never had any problem with the times getting out of whack, but then i never use anything but development software anyway. a friend of mine who uses my clock and is an avid `collector,' however, has never reported any problems to me, and he would, if there were any. so don't worry about it-- if it causes any problems, you should probably junk the offending program since it might well try to do boneheaded things like destroying hard disks it doesn't understand. i assume you have yours working. if not, you can have mine-- it's only 160 bytes but only works for the ast cards. -- Dana How ARPA: horus!how@SU-ISL.ARPA UUCP: {decvax,ihnp4,ucbvax}!hplabs!SU-ISL!horus!how AT&T: (415) 424-8874 (o), (415) 851-2449 (h) USPS: 1087 Los Trancos Rd, Portola Valley, CA 94025