Subject: Re: Looking for information about a DEC video board...
To: Jon Katz <firstname.lastname@example.org>
From: Herb Peyerl <email@example.com>
Date: 04/13/1996 06:46:23
Jon Katz <firstname.lastname@example.org> wrote:
> The CL5422 (your Cirrus Logic chip) is a standard Cirrus Logic SVGA chip.
> Its on the low end, but if I remember correctly it can do 1024x768x16 (or
> > Looking at the board, it has the following "big chips" on it:
> > Cirrus chip (video?) with markings:
> > Cirrus Logic
> > CL-GD5422-80QC-D
> > 35318-302E
> > 9502 N
> > MALAYSIA-A
I have docs on the Cirrus chip in front of me...
It says the "CL-GD5420" can do:
- dot clock up to 75Mhz
- 32x32 hardware cursor
- Resolutions up to 1024x768
- 1024x768x16 interlaced and non-interlaced.
- 1024x768x256 interlaced
But the CL-GD5422/5424/5426 can do:
- Video overlay with color key
- dot clock programmable up to 80Mhz.
- 64x64 hardware cursor
- Resolutions up to 1280x1024
- 1280x1024x16 color interlaced
- 1024x768x[16,256] interlaced and non-interlaced.
The 5424/5426 have "a 16bit '386 and '486 local bus interface'.
The 5426 apparently has "BitBLT for GUI acceleration and 2MBYTES of
Anyway, it kind of looks like a non-exciting chip in any event...