From: francois@femur.ai.mit.edu (Charles Francois) Subject: (Newbie+X+Laptop)=>loosing more hair Date: 1 Oct 1992 14:52:10 GMT
Thanks to those who replied to my message last week!
Everybody was advising the new Xega, and ... well, I am still
pulling my hair out. The new Xega did not do anything new on my
Laptop (Texas Instrument 3000 WinSX). In fact it does not work as
well as the regular X386. The Xega display is very bad, and, anyway,
it could not be any better than X386. I really think that my Laptop
can do more than EGA:
I have this problem of trash appearing in the 51 first pixel
rows of the screen when I drag the mouse pointer into that area. This
holds for 640x480 resolution. Now, if I use the virtual resolution
800x600, the "blackout zone" is only 41 pixels high. This tells me
that there is more than 256k on video ram on the TI. I also suspect
that there are some overlapping problems with the video memory,
because 51 * 640 ~= 800 * 41 ~= 0x8000
In fact:
- syschk.exe finds a wd90c10 (normally Paradise 256k) with 728k.
- X386v1.1 finds a "pvga1" (== pvga1a or pvga1b, I suppose) with 1024k.
- The manual of the 3000 WinSX speaks about a 1024x768x16 mode, and
also about a 680x480x256 mode, that both require 512k. These modes
are only available for external monitors though.
Paradise.doc that you can find at tsx-11 describes several
chips : pvga1a, wd90c00 also called pvga1b, wd90c10, wd90c11. The
ones that match the more closely (but not completely) what my manual
says are the wd90c00 and the pvga1a.
So here is my question:
The VGA BIOS extension of the 3000 WinSX is copyrighted
Quadtel 90c20. Does that means that there exist some wd90c20 paradise
chip? And if yes, is it supported by the current release of X386?
Do I have some weird video chip from behind the barn?
- Charles -