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AST RESEARCH, INC.          TECHNICAL BULLETIN # 1183               5-15-95

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		    MANHATTAN G P60 SYSTEM HANGS WITH PCI IRQ CONFLICTS


PROBLEM

The NCR SCSI PCI controller and other PCI devices have a sharing problem 
with the same IRQ.  Under NetWare, the Manhattan G system automatically 
dismounts SYS volume or reports a lost hardware interrupt error.


CAUSE

The system is using a BIOS prior to revision 1.05, and the CMOS held Last 
Working Configuration (LWC) needs to be cleared.


SYSTEMS AFFECTED
AST PART NUMBER AND DESCRIPTION

501530-XXX MANHATTAN G 5060 - ALL MODELS


SOLUTION

1) Use the most current Manhattan G system BIOS, release 1.05 (AST BIOS 
part number 905555-032 A).  Request the part number from AST Spare Parts 
(800) 727-1278, the local AST Authorized Service Center, or download file 
555032.EXE from AST's BBS (817) 230-6850, "Systems" file area.  AST's BBS
supports modem speeds up to 28.8k bps.  The above file will also be posted 
on: 


CompuServe 
Go ASTSUPPORT

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

For additional information on the Manhattan G System BIOS, see Software 
Bulletin # 0220 in the SBS library of AST's BBS.

2.) After the new BIOS is flashed into the system, remove the battery to drain 
the CMOS storage.  This will clear the ESCD for the PCI/Plug-n-Play CMOS 
RAM.

After these steps are taken, the system will use different IRQs for the add-in 
cards performing to designed specifications.


NOTE

Even though a new BIOS is flashed into the system, the new BIOS will continue 
to use the old BIOS's LWC which is stored in the CMOS RAM. The system can 
only be completely reconfigured if the CMOS battery is removed and the LWC is 
erased.