A d v a n c e d
		   ÜÜÜÜ  ÜÜÜÜÜ    ÜÜÜÜ  ÜÜ    ÜÜ Ü  ÜÜÜÜÜ
		  Þ  ÜÜ  Þ    Ý  ÞÛ  ÛÝ ÞÛ    ÛÝ Û ÞÜÜÜÜÜ
		  Þ    Ý ÞßßÛß  ÞÛ    ÛÝ ÞÛ  ÛÝ  Û       Ý
		   ßßßß  ß   ß  ß      ß  ßßßß   ß  ßßßßß
		  Advanced Gravis Computer Technology Ltd.

      Fax (604) 431-5155                   BBS  (604) 431-5927 V32bis
      Compuserve: GO PCVENB (71333,350)    InterNET EMail: tech@gravis.com
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      AOL: Adv Gravis                      Genie: Page M805 Topic 6
	Copyright (C) 1993 by Advanced Gravis Computer Technology Ltd.
			   All Rights Reserved

=============================================================================

SBOS Sound Blaster(tm) Emulation for UltraSound MAX v0.21
---------------------------------------------------------

This Zip file contains the following files:

     SBOSON.BAT        - RUN this to get SBOS Emulations
     SBOSOFF.BAT       - RUN this to turn off Emultaions and to unload the
			 driver from memory
     DRIVER.EXE        - SBOS driver
     LOADER.EXE        - required by the SBOS driver
     SBOS512.SBS       - Sound Library for SBOS to use with 512K bytes
			 of GUS memory
     SBOS1024.SBS      - Sound Library for SBOS to use with 1012K bytes
			 of GUS memory

Installations:
--------------
     Simply unzip and the files into an empty directory. For example:

     C:\ULTRASND>md maxsbos   <ENTER>
     C:\ULTRASND>cd maxsbos   <ENTER>
     C:\ULTRASND\MAXSBOS>pkunzip a:\maxsbos.zip . <ENTER>

Using SBOS
----------
     Simply type SBOSON in the directory where you have put the files before
you run the game, and choose Sound Blaster(tm) in the games that you want to
play.

What's the difference?
----------------------
     Just run it and you can immediately hear the difference! Now the SBOS
make use of all the memory you have on board (512K and 1024K) to improve
sound quality.

     Note that you will no longer hear "SBOS installed" when the driver
is loaded successfully.

Comments on this version of MaxSBOS
-----------------------------------

1) We have identified a very subtle defect in Rational's DOS4GW
   DOS extender and are working with them to get it fixed.  The current
   version of MaxSBOS has a workaround for this problem.  Examples of
   symptoms that it fixes are:
   
		Severe slowdowns.
			Doom, Doom2, Raptor, Rise of the Robots
			ShadowCaster.
		No Sound.
			Theme Park
			Magic Carpet
		Dies.
			Cyberia
			Warcraft
			Menzoberranzan
			Dark Forces
		Flakey.
			Relentless
			Ravenloft

2) Games with some versions of HMI (SOS) sound drivers have problems
     when using them with MaxSBOS. The HMI drivers corrupt the IRQ7
     vector and if SBOS is using that one for the synth (for example,
     ULTRASND=220,1,1,7,5), it will NOT work. If you flip the IRQS and
     have the synth IRQ be 5 (ULTRASND=220,1,1,5,7) then it will work
     OK. Magic Carpet has this problem. You can use upper IRQs for it
     also.  We are working with HMI on this problem.

3) Noctropolis. This game uses a DOS extender that requires the use of
     the /C option in the loader, e.g., by typing SBOSON /C.  Other
     games that use this extender include EarthSiege and Harpoon2.  Such
     games can be detected by scanning the executable for the string:

       DOS extender Copyright 1991 1993 by Doug Huffman

     We are currently investigating ways of eliminating the need for 
     the /C switch in future versions.

4) One remaining problem is the Dark Forces demo.  The digital audio can
     be heard if the /c option is used, but the music is not of very good
     quality and it may be better to just turn it off.
			    
5) Although this version of SBOS requires an UltraSound Max for the                            
     digital audio, we will release versions of it in the future that
     support all UltraSounds.
			    < End of File >