=

AST RESEARCH, INC.         TECHNICAL BULLETIN # 1228                6-20-95

=


BRAVO MS VIEWSONIC 20G MONITOR


PROBLEM

Overscanning may occur when using a Viewsonic 20G monitor on a Bravo MS 
system.  The image going to the monitor is too large for the monitor's 
viewing area.  


CAUSE

The Cirrus Logic Winmode video drivers, version 1.21 or earlier, are not 
compatible with the Viewsonic 20G monitor.


SYSTEMS AFFECTED
AST PART NUMBER AND DESCRIPTION

501443-XXX      BRAVO MS 4-100T


SOLUTION

Update Winmode to version 1.22 or higher using the Cirrus Logic video 
drivers, AST part numbers 911368-313 through 318.  To obtain the VGA 
driver for Cirrus 543X, version 1.22, download the following files:

368313.EXE
368314.EXE
368315.EXE
368316.EXE
368317.EXE
368318.EXE

from AST's BBS (817) 230-6850, in the "Systems" file area.  AST's BBS
supports modem speeds up to 28.8k bps.  The above files will also be 
posted on: 

CompuServe 
Go ASTSUPPORT

AST Worldwide Web Site
http://www.ast.com

For additional information on the Cirrus Logic video drivers, see Software 
Bulletin 0181 in the SBS library of AST's BBS.