H132931 - System Hang w/Diamond Viper VLB Adapter in PC 300                  
                                                                                
                                                                                
                                                                                
SYMPTOM:                                                                        
IBM PC 300 Series 6571 and 6581 may exhibit a system hang                       
condition after setting the video resolution of the Diamond Viper               
VLB or Diamond Viper SE VLB video adapter to SVGA mode.                         
                                                                                
PROBLEM ISOLATION AIDS:                                                         
The system hang condition may occur after installing the Diamond                
Viper VLB or Diamond Viper SE VLB adapter's device drivers for                  
Windows 3.1.  If the adapter is configured to run any resolution                
higher than VGA (640 X 480) using the Diamond Viper device                      
drivers, the system may hang following the restart of                           
Windows 3.1.                                                                    
                                                                                
FIX:                                                                            
Use the VPRMODE command on the Diamond Viper install diskette                   
to set the adapter address from "800000000" to "200000000."                     
                                                                                
                                                                                
Diamond Viper is a trademark of Diamond Computer Systems