UTILITY FILES
-------------

VPRMODE.EXE     command line and menu driven mode and monitor setting
		utility.  Use VPRMODE.EXE to configure the Viper VLB
		for your particular monitor, to change the VIPER VLB
		memory address, to select a text display mode, and to
		run Viper VLB diagnostics.
		VPRMODE saves monitor timing information to the
		VIPER.INI file.

		NOTES:  1. use VPRMODE ? for command line option list.

			2. the VPRMODE monitor configuration save screen
			   may be displayed after running some of the
			   VPRMODE commands.  If this happens, select
			   ENTER to save. The screen will not appear again.

			3. KNOW YOUR MONITOR! Please refer to your monitor
			   manual or manufacturer for correct monitor timing
			   information before running VPRMODE, and before
			   contacting Diamond for technical assistance. If
			   you do not have this information, DIAMOND WILL
			   NOT BE ABLE TO HELP YOU with VPRMODE problems.

			4. "SVESA" command line option loads a special VESA BIOS
			   TSR.  The only difference between this special VESA
			   BIOS TSR and the normal VESA BIOS TSR (loaded by
			   "VESA" command line option) is the scan line length
			   (the difference between the addresses of two
			   vertically neighboring pixels) in VESA mode 101h
			   (640x480 256 color).  The normal VESA BIOS TSR sets
			   the scan line length to 640 bytes (mode default) in
			   VESA mode 101h, but the special VESA BIOS sets the
			   scan line length to 1024 bytes in VESA mode 101h.
			   Loading this special VESA BIOS fixes the screen
			   scrambled and distorted problem for those
			   applications (such as DataShop v1.0, Space Shuttle
			   and Dracula Unleashed) which change the scan line
			   length from 640 bytes to 1024 bytes by programming
			   CRTC Row Offset register (direct I/O with CTRC ports)
			   themselves in VESA mode 101h.  This option is not
			   supported in 1MB Viper board due to the hardware
			   (Weitek Power 9000) limitation.

			5. In OS/2 environment, the following command line
			   options should be used to fix the screen scrambled
			   and distorted problem for different Viper boards:
			   5.a "MEMC0" : forces Viper board to memory
					 configuration type 0.  Used for 1MB
					 Viper board with PCB rev. B1 and later
			   5.b "MEMC1" : forces Viper board to memory
					 configuration type 1.  Used for 1MB
					 Viper board with PCB rev. Ax
			   5.c "MEMC2" : forces Viper board to memory
					 configuration type 2.  Used for all
					 2MB Viper boards


VIPER.INI       this file is used to store the monitor and configuration
		information for the Viper VLB, and is updated each
		time you choose to Save Configuration from the VPRMODE.EXE
		program.  Drivers find the location of the VIPER.INI file
		by checking the VIPERPATH environment variable.

VIPERPATH       an environment variable which is used by device drivers
		(Windows 3.1, AutoCAD) to locate the VIPER.INI file.
		This variable is set by the DOS SET command, and is
		automatically appended to your AUTOEXEC.BAT file during
		Viper VLB Utility installation.


			!!!!!  IMPORTANT !!!!!

		   THE VIPER.INI FILE AND THE VIPERPATH STATEMENT ARE
		   NEEDED FOR PROPER USE OF THE VIPER VLB WINDOWS AND
		   AUTOCAD DRIVERS!  DO NOT REMOVE THEM FROM YOUR SYSTEM.



Contacting DIAMOND
------------------
Diamond can be reached through a number of ways:

Postal Service  : Diamond Multimedia Systems, Inc.
		  1130 East Arques Avenue
		  Sunnyvale, CA  94086
Voice (Main)    : (408) 736-2000
Voice (TechSppt): (408) 736-2000 [M-F 6-7; Sat 8-4 Pacific]
				 [plus 24hr automated help]
FAX (Main)      : (408) 730-5750
FAX (Support)   : (408) 773-8000
BBS (to 2400)   : (408) 730-1100
BBS (9600+)     : (408) 524-9301
CompuServe      : GO DMNDONLINE
America Online  : GO DIAMOND



All product names listed are trademarks or copyrights of their
respective owners.
=======================================================================
Diamond Multimedia Systems, Inc.                            (c) 1993-94
(408) 736-2000                                      All Rights Reserved
=======================================================================

