    AST RESEARCH, INC.         TECHNICAL BULLETIN #0768                  07-23-92

                  AST PREMIUM II 386/33 AND TORUS ETHERNET ADAPTER

    PROBLEM:       When using the AST Premium II 386/33 with the Torus Ethernet
                   Adapter in a Microsoft LAN Manager 2.X environment, the system
                   will fail to map drives or access files on the file server and
                   will display the error message "DOS Error 5."

    CAUSE:         The Torus Ethernet is a bus-mastering card that is not
                   compatible with the Premium II, Premium CLEM, and Bravo 486
                   series of computers.
    AFFECTED
    SYSTEMS:       AST  Premium II systems.
                   AST Premium CLEM systems.
                   AST Bravo 486 systems.

    SOLUTION:      AST Sustaining Engineering has determined that this problem
                   will not be fixed.  AST suggests using an alternate network
                   interface card.