ALPHA RESEARCH CORPORATION

S455S

Data bus:                16-bit, ISA
Size:                    Full-length, full-height card
Hard drive supported:    Up to seven SCSI drives
Floppy drives supported: 360KB, 720KB, 1.2MB, or 1.44MB (2)

[Image]

                      CONNECTIONS

                 Purpose                    Location

  SCSI drive interface (50 pin) external       CN1

  SCSI drive interface (50 pin) internal       CN2

  Floppy drive interface                       CN3

  Hard drive activity LED                      JP1

  Speaker                                      JP2

                        USER CONFIGURABLE SETTINGS

               Function
                                           Location
                                                              Setting

  »
      Floppy drive enabled
                                              JP3
                                                               closed


      Floppy drive disabled
                                              JP3
                                                                open

                       MISCELLANEOUS TECHNICAL NOTES

    This controller supports 256KB, 1MB, or 4MB fast page mode SIMM's ,
    80nsec or faster. All four SIMM sockets must be filled with the same
                     size SIMM's for proper operation