AST RESEARCH, INC.            TECHNICAL BULLETIN #0908                3-22-94




                      AST POWEREXEC SYSTEM SETUP CHANGE


PROBLEM:       The PowerExec Power Station does not recognize a Colorado
               Memory Systems 250 MB Jumbo Tape Drive. The error message:

                       "Error 87 No Tape Drive Detected"

               is displayed while trying to do a Tape Status, Format, and
               Directory of Tape. The version of Colorado tape software is v.
               3.03 for DOS.

CAUSE:         An incompatibility between the I/O address of the Powerstation
               and the Colorado Tape Drive.

SYSTEMS
AFFECTED:      Power Station PWRE.

SOLUTION:      Colorado Memory Systems has provided instructions on modifying
               their code to enable the selection of a secondary I/O address.
               This involves using DEBUG.  The following are the steps to
               allow the Colorado JUMBO 250MB tape drive to work with the AST
               PowerStation/PowerExec:

                  AST PowerExec System Setup Change

               1) Go to System Setup and press <Fn>+<F2>.
               2) Select System Configuration and press <Enter>.
               3) Select PowerStation Options: Floppy Drive B.
               4) Select 1.2 MB 5.25" and press <Enter>.
               5) Select Exit To Main Menu and press <Enter>.
               6) Select Exit System Setup and press <Enter>.
               7) Select Exit and Save Changes. Press <Enter>.

                  Colorado Software Change

               This change applies to Colorado tape backup software for DOS,
               version 3.03.

               1) Go to the subdirectory that contains the tape software
                  (TAPE).
               2) Type: DEBUG TAPE.CFG and press <Enter>.
               3) Type: <E 105 70> and press <Enter>. This changes the
                  address from F0 to 70.
               4) Type: W and press <Enter>. This writes the change to the
                  file.
               5) Type: Q and press <Enter>. This quits debug.
               6) Reboot system.