12 Aug
2012
12 Aug
'12
1:40 p.m.
Date: Sun, 12 Aug 2012 09:39:31 -0600
From: Richard <legalize at xmission.com>
To: cctalk <cctalk at classiccmp.org>
Subject: Re: PXG/PXG+/PXG Turbo/PXG Turbo+ boards for DECstation 5000
Message-ID: <E1T0aGJ-0000zS-R7 at shell.xmission.com>
In article <20120812105727.2a3ad798.jkunz at unixag-kl.fh-kl.de>,
Jochen Kunz <jkunz at unixag-kl.fh-kl.de> writes:
<http://tinyurl.com/d3d-pipeline>
On Sat, 11 Aug 2012 14:53:46 -0600
Richard <legalize at xmission.com> wrote:
I'd like to see some high resolution close-up pictures if possible!
--
"The Direct3D Graphics Pipeline" free book
Does anyone have one of these boards?
Yes,
at least one PXG+ and IIRC a PXG that's the RAM modules missing. The Computer Graphics Museum
<http://computergraphicsmuseum.org>
The Terminals Wiki <http://terminals.classiccmp.org>
Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>
I have one of the PXG models in a Decstation 5000/200 up at the cottage, I
can try to get a picture
of the next time I'm at the cottage. The PXG uses an i860 for 3D geometry
and a pixel planes chip
for 2D raster fill.
A pixel planes chip is relatively easy to design, even with primitive VLSI
tools. I built one in the
mid 1980s using a gate array technology that we had free access to. Once
you have the cell
for a single pixel it's just a matter of duplication and adding some
interface logic around the
edge of the chip.