Path: chuka.playstation.co.uk!news
From: "Matt Verran" <mverran@btinternet.com>
Newsgroups: scee.yaroze.freetalk.english
Subject: Re: Vertical Borders
Date: Tue, 20 Feb 2001 16:17:03 -0000
Organization: PlayStation Net Yaroze (SCEE)
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> Hmmm . . .
>
> I've been thinking about ways of freeing up more VRAM space in Xenon 2000
(a
> vertically scrolling shoot-'em-up).  One idea I've been toying with is
> vertical borders - since I'm running in 640x512 I could have a black 64
> pixel border on each side of the screen giving me a viewable area of
512x512
> and some extra VRAM space.  But why don't I just use the 512x512 screen
mode
> you ask?  Because it messes up the aspect ratio, which looks bad (worse
than
> having borders IMO).
>
> Implementing them is a bit of a problem though.  It's easy to clip drawing
> to a width of 512 with GsClip2D and shift the screen over 64 pixels with
> GsDISPENV but on the right the bricks screen and part of my extra VRAM is
> visible which looks real nasty.  Any ideas on how to do hide this or if
it's
> really a sensible idea?
>
> Derek

I've seen this happen when setting  the GsDISPENV variables. I've found that
whatever screenmode I'm using I have to set "GsDISPENV.screen.w" and
"GsDISPENV.screen.h" both to 255 to stop other bits of the vram being
visible at the sides of the screen. Maybe altering these value might help?