Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!columbia!rutgers!sri-spam!ames!sdcsvax!nosc!humu!uhccux!todd From: todd@uhccux.UUCP (The Perplexed Wiz) Newsgroups: comp.sys.ibm.pc Subject: Re: millisecond timing Message-ID: <688@uhccux.UUCP> Date: Wed, 15-Jul-87 15:24:46 EDT Article-I.D.: uhccux.688 Posted: Wed Jul 15 15:24:46 1987 Date-Received: Sat, 18-Jul-87 01:49:28 EDT References: <4343@jade.BERKELEY.EDU> <62@b.gp.cs.cmu.edu> Reply-To: todd@uhccux.UUCP (The Perplexed Wiz) Organization: U. of Hawaii, Manoa (Honolulu) Lines: 21 In article <62@b.gp.cs.cmu.edu> ralf@b.gp.cs.cmu.edu (Ralf Brown) writes: >It is possible to get timing loops which are independent of CPU speed (well, >almost--they can't handle changing clock speed in the middle). Turbo Pascal >does this to get the DELAY function to work regardless of clock speed, and I haven't tried it but there is an assembly language routine in the Feb 1987 issue of "Behavior Research Methods, Instruments, & Computers" that claims to provide 1msec timing accuracy on an IBM PC. Graves, Roger, & Bradley, Ron (1987). Millisecond interval timer and auditory reaction time programs for the IBM PC. Behavior Research Methods, Instruments, and Computers, 19: 30-35. ...todd -- Todd Ogasawara, U. of Hawaii Center for Teaching Excellence UUCP: {ihnp4,seismo,ucbvax,dcdwest}!sdcsvax!nosc!uhccux!todd ARPA: uhccux!todd@nosc.MIL INTERNET: todd@uhccux.UHCC.HAWAII.EDU