Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!tut.cis.ohio-state.edu!ucbvax!ucdavis!deneb.ucdavis.edu!g562728035ea
From: g562728035ea@deneb.ucdavis.edu (R.Goldthwaite)
Newsgroups: comp.sys.ibm.pc
Subject: how to read joystick
Message-ID: <4972@ucdavis.ucdavis.edu>
Date: 27 Jul 89 22:27:51 GMT
Sender: uucp@ucdavis.ucdavis.edu
Reply-To: g562728035ea@deneb.ucdavis.edu (R.Goldthwaite)
Organization: University of California, Davis
Lines: 24


Well, what is a convenient way to get joystick coordinates?
From Turbo Pascal (5), for example. 

The subject seems undiscussed, in either
the technical literature (Byte, PCWeek); trade books on MeSsy-DOS or 
Turbo Pascal (our preferred environment); or the experimental psych
journal, Behavior Research Methods, Instrumentation & Computers, which has
otherise helped greatly in areas like millisecond timing.

An older Byte has a Turbo source with some inline assembly to countdown
until the joystick interrupts.  This sort-of works, but doesn't cover the
full range of the joystick no matter how long the countdown is, and -worse-
has weird discontinuities and non-linearities.  Isn't there a BIOS call
which could be used more reliably?

We use many Zenith XT clones, and many joysticks - Kraft, Mach, etc -
involved here.  That should be irrelevant.  

Thanks for any help.  Email & I'll summarize.

Ron Goldthwaite               rogoldthwaite@ucdavis.edu
Psychology & Animal Behavior
U.California, Davis