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AST RESEARCH, INC.        TECHNICAL BULLETIN # 1072                2-15-95

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				USE OF CMD640X.SYS WITH AST SYSTEMS


PROBLEM
Use of the CMD640X.SYS driver may cause sporadic errors and other 
non-destructive failures in otherwise functional systems. 

CAUSE
Unstable driver.  The functionality and purpose of this driver are obsolete.

SYSTEMS AFFECTED
AST PART NUMBER AND DESCRIPTION

501680-001     2  BMS P90/1003C AA STIN 16MB256K
501533-304     C  BMS P-60/423W 8MB/1MB FRA 230V 
501534-204     C  BMS P-90/423W 8MB/1MB FRA 230V 
501534-404     4  BMS P/90  543W 8MB/1MB   230V FRA 
501701-404     B  BMS P/75  543W 8MB/1MB   230V FRA 
501701-504     B  BMS P/75  1003W 16MB/1MB 230V FRA
501533-307     C  BMS P-60/423W 8MB/1MB GER 230V 
501534-207     C  BMS P-90/423W 8MB/1MB GER 230V 
501534-407     4  BMS P/90  543W 8MB/1MB   230V GER 
501701-407     B  BMS P/75  543W 8MB/1MB   230V GER 
501701-507     B  BMS P/75  1003W 16MB/1MB 230V GER
501533-308     C  BMS P-60/423W 8MB/1MB ITL 230V 
501534-208     C  BMS P-90/423W 8MB/1MB ITL 230V 
501534-408     4  BMS P/90  543W 8MB/1MB   230V ITL 
501701-408     B  BMS P/75  543W 8MB/1MB   230V ITL 
501701-508     B  BMS P/75  1003W 16MB/1MB 230V ITL
501533-309     C  BMS P-60/423W 8MB/1MB NOR 230V 
501534-209     C  BMS P-90/423W 8MB/1MB NOR 230V 
501534-409     4  BMS P/90  543W 8MB/1MB   230V NOR 
501701-409     B  BMS P/75  543W 8MB/1MB   230V NOR 
501701-509     B  BMS P/75  1003W 16MB/1MB 230V NOR
501533-310     C  BMS P-60/423W 8MB/1MB SPN 230V 
501534-210     C  BMS P-90/423W 8MB/1MB SPN 230V 
501534-410     4  BMS P/90  543W 8MB/1MB   230V SPN 
501701-410     B  BMS P/75  543W 8MB/1MB   230V SPN 
501701-510     B  BMS P/75  1003W 16MB/1MB 230V SPN
501533-311     C  BMS P-60/423W 8MB/1MB SWD 230V 
501534-211     C  BMS P-90/423W 8MB/1MB SWD 230V 
501534-411     4  BMS P/90  543W 8MB/1MB   230V SWD 
501701-411     B  BMS P/75  543W 8MB/1MB   230V SWD 
501701-511     B  BMS P/75  1003W 16MB/1MB 230V SWD
501533-302     3  BMS P-60/423W 8MB/1MB UK 230V 
501533-303     3  BMS P-60/423W 8MB/1MB INTL 230V 
501534-202     3  BMS P-90/423W 8MB/1MB UK 230V 
501534-203     3  BMS P-90/423W 8MB/1MB INTL 230V 
501534-402     4  BMS P/90  543W 8MB/1MB   230V UK 
501534-403     4  BMS P/90  543W 8MB/1MB   230V INT 
501701-402     B  BMS P/75  543W 8MB/1MB   230V UK 
501701-502     B  BMS P/75  1003W 16MB/1MB 230V UK
501533-313     3  BMS P-60/423W 8MB/1MB DUT 230V 
501534-213     3  BMS P-90/423W 8MB/1MB DUT 230V 
501534-413     4  BMS P/90  543W 8MB/1MB   230V DUT 
501701-413     B  BMS P/75  543W 8MB/1MB   230V DUT 
501701-513     B  BMS P/75  1003W 16MB/1MB 230V DUT
501533-312     C  BMS P-60/423W 8MB/1MB LAT 115V 
501534-212     C  BMS P-90/423W 8MB/1MB LAT 115V 
501534-412     4  BMS P/90  543W 8MB/1MB   115V LAT 
501701-412     B  BMS P/75  543W 8MB/1MB   115V LAT 
501701-512     B  BMS P/75  1003W 16MB/1MB 115V LAT
501533-305     C  BMS P-60/423W 8MB/1MB SWF 230V 
501534-205     C  BMS P-90/423W 8MB/1MB SWF 230V 
501534-405     4  BMS P/90  543W 8MB/1MB   230V SWF 
501701-405     B  BMS P/75  543W 8MB/1MB   230V SWF 
501701-505     B  BMS P/75  1003W 16MB/1MB 230V SWF
501533-306     C  BMS P-60/423W 8MB/1MB SWG 230V 
501534-206     C  BMS P-90/423W 8MB/1MB SWG 230V
501534-406     4  BMS P/90  543W 8MB/1MB   230V SWG 
501701-406     B  BMS P/75  543W 8MB/1MB   230V SWG 
501701-506     B  BMS P/75  1003W 16MB/1MB 230V SWG
501533-401     3  BMS P-60/733C 16MB/1MB 115V 
501534-301     3  BMS P-90/733C 16MB/1MB 115V
501533-404     C  BMS P-60/733C 16MB/1MB FRA 230V 
501534-304     C  BMS P-90/733C 16MB/1MB FRA 230V

SOLUTION
AST recommends that users remove the CMD640X.SYS reference from their 
CONFIG.SYS file.  Functionality provided by this driver has been incorporated 
in the AST system BIOS.  Configuration of advanced features can be achieved 
with the Admin Tools Utility program.  The file name is 775033.EXE. 
These utilities may be found on various on-line services including:  AST's BBS 
(817) 230-6850, in the "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 further information on the Administrator Tools, see Software Bulletin 
# 0202 located on AST's BBS, in the "Systems" file area.