
	     ______             ____  ______     _____  ______ 
	    |  ____|           |  _ \|  ____|   / / _ \|  ____|
	    | |__ _ __ ___  ___| |_) | |__     / / |_| | |__ 
	    |  __| '__/ _ \/ _ \  _ <|  __|   / /|  _  |  __|
	    | |  | | |  __/  __/ |_) | |____ / / | | | | |
	    |_|  |_|  \___|\___|____/|______/_/  |_| |_|_|


		    Tseng driver implementation notes.



   This is a software-only driver for the Tseng ET3000, ET4000, and ET6000 
   chipsets, based on the native Tseng drivers from old versions of the 
   Allegro library. It has no support for linear framebuffers or accelerated 
   drawing operations. As such it is useful primarily because it is faster 
   than the VESA 1.x bank switching mechanism, and as a workaround for the 
   many bugs in common VESA driver implementations.

   This code is not portable to any platforms other than DOS+DPMI, because 
   it uses BIOS calls to set the initial video mode.

   Any volunteers to add hardware accelerator support? That would be very 
   welcome if you want to do it :-)


   By Shawn Hargreaves (shawn@talula.demon.co.uk)
   Truecolor support added by Marco Campinoti (marco@etruscan.li.it)
   ET6000 support contributed by Ben Chauveau (bendomc@worldnet.fr)
