Xref: utzoo comp.sys.mac.hypercard:1329 comp.sys.mac.programmer:3438 Path: utzoo!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!apple!lsr From: lsr@Apple.COM (Larry Rosenstein) Newsgroups: comp.sys.mac.hypercard,comp.sys.mac.programmer Subject: Re: Reaction Time stacks : can I do this? Message-ID: <294@internal.Apple.COM> Date: 7 Dec 88 02:44:04 GMT References: <6012@mva.cs.liv.ac.uk> <21792@apple.Apple.COM> Organization: Advanced Technology Group, Apple Computer Lines: 19 In article <21792@apple.Apple.COM> dan@Apple.COM (Dan Allen) writes: >In article <6012@mva.cs.liv.ac.uk> phil@mva.cs.liv.ac.uk writes: >>1) is it possible to write an XCMD/XFCN to await a keypress and to time >>more accurately than 1/60th of a second, and return this info to a script. > >Yes, an XCMD can measure event timing to finer intervals. You would >need to write some tricky code to use one of the VIA internal >millisecond timers. It is easier to use the Time Manager that to hack with the hardware directly. With the Time Manager you can have an interrupt routine called every milisecond. The routine can simply increment a counter to provide a more accurate time base. -- Larry Rosenstein, Object Specialist Apple Computer, Inc. 20525 Mariani Ave, MS 46-B Cupertino, CA 95014 AppleLink:Rosenstein1 domain:lsr@Apple.COM UUCP:{sun,voder,nsc,decwrl}!apple!lsr