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  From: John Weismiller <johnweis@home.com>
  To  : ggi-develop@eskimo.com
  Date: Fri, 21 May 1999 00:29:17 +0000 (   )

Independent Multihead

Hello all,

I'm trying to chase the independent multi-head thing and although I do not
have it set up yet, I have 2 matrox millenium cards. 

I also have a bunch of old DEC LK401 keyboards, that I have been hacking
away at.  So far I have figured out that they run at 4800-8N1, RS423, with
the Black being the keyboards TX, Yellow as RX, Green as GND and Red as
+12V.  I have found a good site describing it in better detail at:
http://www.mit.edu/%7Emcmahill/NetBSD/pmax/LK201/lk201.html

So far I have tried to run XGGI unsuccessfully with matroxfb on kernel
v2.2.2.  All that I get is either a blank screen, or a screen that only
has the blue colour, and lots of other weirdness.  Do I have to upgrade
stuffs?  Is there a FAQ that covers this?  The card is an original
millenium I with 2M of video ram.

What I think I would like to do is create in input driver for GII, and run
XGGI on the second matrox with the lk401 as the keyboard.

So, my first real question is this:  Where do I need to do to create an
input driver and make it compile, etc?  I presume that the easiest
approach would be to take something like the file input driver and modify
it to read from the serial port instead?  What background info do I need
to know to make a successful keyboard driver?  I guess I just need to fill
out the inp-> structure as in the initialization routines?  (I will play
around with this some more)

Next, what about the GGI part?  I have been looking through the GGI
source for the fbdev and it seems to want to open the tty that is
associated with the frame buffer, as well as do a bunch of VT switching
stuffs.  I don't think that all this would  be wanted if all that I want
is to run X on a second display.

Last, who else has been doing stuff with independent multi-head?  Is there
a FAQ for it?  What web resources, if any, exist?  Should I (try) to set
up a web site for it?

Anyways, I am really eager to get something going with this, so if anybody
out there has some suggestions or success, I would really like to hear
from you.

------------------------------------------------------------------------------
John Weismiller, Burnaby, British Columbia, Canada.
email: johnweis@home.com, ICQ 12833806.
------------------------------------------------------------------------------


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