xvesa mouse

I've got this old 486 laptop that im running the svga xserver on but I 
only get 8bpp color on it.  So I tried the xvesa driver and I can get 
16bpp color on it but I can't use the mouse. Im running xfree server 
3.3.6 on a deli linux distro running kernel 2.2.26. (This is just a 
play/internet surfing laptop)  I can get the vesa server running with an 
external ps/2 mouse, with no trouble with the mouse.  The built in mouse 
is one of those funky side mount trackball style mice.  Under the svga 
server the ps/2 protocol with /dev/psaux mouse style works great with 
the trackball.  I thought that the vesa server used the same mouse 
drivers but it doesn't work for me on the xvesa server.  I know that its 
rare that anyone is running a mouse like this but if anyone has any 
insight as to where I should begin my hunt it would be great.

Thanks.

Aaron