PERCEPTIVE SOLUTIONS INC.

HYPERSTORE MEDIADAPTERS

Up to four Mediadapters of any type may be attached to a hyperSTORE
controller.

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                                CONNECTIONS

  50-pin connector-to attach to host controller                 CN1

  34-pin control cable connector-hard drive                     CN2

  20-pin data cable connector-drive 0                           CN3

  20-pin data cable connector-drive 1                           CN4

  50-pin SCSI connector-internal                                CN5

  40-pin AT Interface (IDE) cable connector-internal            CN6
  drive 0 &1

  40-pin AT Interface (IDE) cable connector-internal            CN7
  drive 2 & 3 (IDE-4)

                TERMINATION POWER FOR THE SCSI MEDIADAPTER

              Function                    Location           Setting

  »   Term. Power supplied by             closed*           installed
      Terminated Mediadapter

      Mediadapter Terminated                open            installed

      Term. Power supplied by             closed*            removed
      Mediadapter

      Term. Power supplied by SCSI          open             removed
      bus

  Note:*If the LED is not lit when JB1 is closed, fuse F1 is blown; the
  Mediadapter must be returned to the factory for repair.

                     MEDIADAPTER ADDRESS CONFIGURATION

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            ST506/412 - JB2ESDI - JB1 SCSI - JB3 IDE 2/4 - JB2

    The four jumpers on the respective jumper blocks enable Mediadapter
   addresses (MD) 0-3 with MD0, the default, being the leftmost jumper as
   shown above. If more than one Mediadapter is attached to a hyperSTORE
    controller, each must have a unique address, with one being MD0; the
              order of the other addresses is insignificant.

                       MISCELLANEOUS TECHNICAL NOTES

    JB1 on the ST506/412 Mediadapter is the "encoding method" jumper and
                           has no pins present.

    It is factory set a folllows: "open" enables MFM, "closed by trace"
                               enables RLL.