Path: chuka.playstation.co.uk!news
From: "Peter Armstrong" <hanno@btinternet.com>
Newsgroups: scee.yaroze.freetalk.english
Subject: Re: negative scrolling on homebrew map routine - need help!!
Date: Tue, 20 Mar 2001 19:34:49 -0000
Organization: PlayStation Net Yaroze (SCEE)
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"Andrew Partington" <andrew.partington@harbinger.com> wrote
>
> Last night I attempted using VSyncCallback() for the first time to attempt
to
> get more raster time (as explained in the Net Yaroze FAQ), but I couldn't
get it
> working [so I went away and had a look at some other optimisation measures
> instead, none of which seemed to have much effect :( ]
>
> I had something like:
>
> (in my globals section of my code)
> volatile int waitVSync = 0;

There are problems accessing global variables from within the callback
function. Try declaring your variable as

__declspec(bss) volatile int waitVSync = 0;

This should work.  There's also another method, which involves restoring the
gp register value, check out the CW doc Targeting Net Yaroze, page 66/67 for
more info.

Peter