Path: chuka.playstation.co.uk!news From: "Martin Keates" Newsgroups: scee.yaroze.freetalk.english Subject: Re: negative scrolling on homebrew map routine - need help!! Date: Fri, 23 Mar 2001 11:16:58 -0000 Organization: PlayStation Net Yaroze (SCEE) Lines: 23 Message-ID: <99fb8j$mp52@www.netyaroze-europe.com> References: <3AAF7BB2.B427AED3@harbinger.com> <98o38v$ij81@www.netyaroze-europe.com> <98p3qp$rms2@www.netyaroze-europe.com> <98t840$6f5@www.netyaroze-europe.com> <99057g$3ok7@www.netyaroze-europe.com> <3AB6404F.65C9AF1C@harbinger.com> <9961fn$7jl4@www.netyaroze-europe.com> <99624q$7jl5@www.netyaroze-europe.com> <9963bb$7jl6@www.netyaroze-europe.com> <997j6l$7jl8@www.netyaroze-europe.com> <3AB774C7.6B4D8F95@harbinger.com> <998bjc$7jl11@www.netyaroze-europe.com> <3AB8A751.A5D36CCF@harbinger.com> <3AB8DFBA.7BDE2A4E@harbinger.com> <99b11c$cia1@www.netyaroze-europe.com> <99e5uf$mp51@www.netyaroze-europe.com> NNTP-Posting-Host: modem-36.rutherfordium.dialup.pol.co.uk X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 > With a VSync callback in place, and using 32*32 16-bit sprites for optimal > texture cache usage, i'm still getting around 250 HSyncs in the worst > case -- not enough to cause visible slowdown but enough so that I can't do > anything else in the frame - must try harder! I think you should try using smaller sprites with less depth. I don't think that you have to completely fill the t-cache to get benefit from it. And if you're changing your texture frequently you won't be getting anything from it anyway so you might as well ignore it... > Still no joy with setting the stack to the DCache, it either black screens > on me, or doesn't even leave the brick screen after "go" has been executed > by siocons... no luck with PSComUtil either... Aren't there some library functions that use the dcache? Malloc maybe? The other alternative is that your function variables go over 1K - quite easy to do with a few nested functions. Martin.