X in 8 bit mode - Perfomancetroubles

[Harald Pollak]

Hy! 
Im  using Cygwin XFree on a Acer Travelmate 634lci with Windows XP (
Color 32 bit )
my Application running on OpenVMS.

I have to use 8 Bit Colormode for correct display.

When i start X with the command:

X -ac -fullscreen -depth 8 &

The display is ok, but the perfomane is unuseabel. 

When i use :

X -ac -fullscreen -emulatepseudo &

Then the Applicationdisplay isn't working correct.

Does anyone have a idea how I can use 8bit-colored Application with good
performace on 

Cygwin Xwin

I'm sure anybody outthere has an solution for my problem, so let me
know.

Thanks & best regards

Harry