From: Jon M. Taylor <taylorj@ecs.csus.edu>
  To  : ggi-develop@eskimo.com
  Date: Thu, 27 Aug 1998 23:53:11 -0700 (PDT)

Re: make-3.77 and another problem

On Fri, 28 Aug 1998, Boszormenyi Zoltan wrote:

> I downgraded to make-3.76.1 and LibGGI compiled happily which
> I couldn't achieve with make-3.77. Finally I have seen the demos too! :)
> 
> I experimented a little with kgicon, and I found that 8 and 32 bit modes
> (almost) work on my Trio64V+ but not the 16 bit modes.

	15/16-bit modes have some problems currently.  Horizontal pixel
clock needs to be doubled in some cases and this is not currently done.

> I used simply "fbset -xres X -yres Y -depth D" with the following results:
> 
> 320x200x(no matter what depth) -
>         fbset complains about a failed ioctl, does not set the mode.
>         It is the same with both timelist VESA and monosync SVGA.

	S3 cards generally do not directly support VGA modes.  There is a
hack to use the STREAMS coprocessor of Trio64V+ and greater chipsets to
implement such modes (IIRC XFree86 does this), but the KGI drivers does
not do this yet. 

> 640x(400 or 480)x(8 or 32)     - works OK.
> 800x600x(8 or 32)              - the upper 1/3 of the screen is blanked.

	Timing problems.  Have you tried a different monitor driver?

> (no matter what mode)x16       -
>         the picture is broken, the monitor is set to false timings.

	I had gotten 15/16bpp modes to semi-work in a few cases.

> Strange but the scrolling in 32 bit is visibly faster than in 8 bit.

	Probably a memory bandwidth issue.

> Now I use kgicon compiled in the kernel and in 32 bit mode. The boot
> logo is fully colored, I like it very much. :)

	I still have not seen the boot logo, myself.  I haven't been 
playing with kgicon to much lately since I got into LibGGI3D, I need to 
update myself....
 
> I have one question though: where can I find XF86_FBDev precompiled
> for x86 arch?

	This is becoming a FAQ.  I don't know myself.

Jon 

---
'Cloning and the reprogramming of DNA is the first serious step in 
becoming one with God.'
	- Scientist G. Richard Seed