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From: beh@bass.bu.edu (Bruce E. Howells)
Newsgroups: comp.sys.apple2
Subject: Re: Help with joystick
Message-ID: <72832@bu.edu.bu.edu>
Date: 22 Jan 91 03:38:33 GMT
References: <25823@fs1.NISC.SRI.COM> <36038@netnews.upenn.edu> <11374@darkstar.ucsc.edu>
Sender: news@bu.edu.bu.edu
Organization: Boston University
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In article <11374@darkstar.ucsc.edu> unknown@ucscb.UCSC.EDU (The Unknown User) writes:
>
>In article <36038@netnews.upenn.edu> tyler@eniac.seas.upenn.edu (Tyler W Phillips) writes:
>>	I recently purchased a CH Mach III joystick because my old joystick
>>had a problem of only registering in the top left eighth or so of the normal
>>joystick spectrum.  Well, it appears that it was not the joystick afterall 
>>because this brand new joystick is doing the same thing.  Is there anything
>>I can do about this, or am I condemned never to use a joystick.  BTW, This
>>is on a IIgs if that makes any difference.  Any help would be appreciated.
>
>	This is a very simplistic response, I realize.. but...
>
>	You don't happen to be playing non GS specific games in FAST mode
>on the GS? You have to re-center the joystick if you want to do this...
>(then recenter it back when you play GS games)
>
>
>	For a simple joystick centering program, run this:
>
>10 ? PDL(0),PDL(1)
>20 goto 10
>
>	And then you want to get both as close to 127 as possible w/the
>joystick centered.
>-- 
>/Apple II(GS) Forever! unknown@ucscb.ucsc.edu MAIL ME FOR INFO ABOUT CHEAP CDs\
>\WRITE TO ORIGIN ABOUT ULTIMA VI //e and IIGS! Mail me for addresses, & info. / 

Not quite...  The problem with that is that the joystick timer can't reset
properly between the first and second read, leaving the second one slightly
wrong.  

A cleaner solution is:

10 ? pdl(0),"  ";
20 for i = 1 to 5
30 next i
40 ? pdl(1)
50 for i = 1 to 5
60 next i
70 goto 10

[done from memory, and it's been WAY too long since I've done Applesoft, so
if it's wrong my apologies, but the idea is there]


For further info, see the Technical Reference Manual of your choice.


Bruce Howells, beh@bu.edu