ALPHA RESEARCH CORPORATION

S455I EISA

Data bus:                32-bit, EISA
Size:                    Half-length, full-height card
Hard drive supported:    IDE (AT) interface drives (4)
Floppy drives supported: 360KB, 720KB, 1.2MB, or 1.44MB (2)

[Image]

                  CONNECTIONS

              Function               Location

  IDE drive interface (Primary)         CN1

  IDE drive interface (Secondary)       CN2

  Floppy drive interface                CN3

  Hard Drive activity LED               JP1

  Speaker                               JP2

                        USER CONFIGURABLE SETTINGS

              Function                    Location           Setting

  »   IDE Bus 1 (CN1) resistors             JDR0               open
      open

      IDE Bus 1 (CN1) resistors             JDR0              closed
      shorted

  »   IDE Bus 2 (CN2) resistors             JDR1               open
      open

      IDE Bus 2 (CN2) resistors             JDR1              closed
      shorted

                       MISCELLANEOUS TECHNICAL NOTES

   When using this controller, the system will see the drives attached to
    each connector as a single drive. i.e.: if you have two 100MB drives
   attached to CN1 the system will see one 200MB drive. However, if have
   two drives you would like to be recognize individually, you may attach
                     one to CN1 and the other to CN2.

  Closing Jumpers JDR0 and JDR1, shorting the resistors on the IDE buses,
    helps to eliminated drive incompatibility caused by different noise
                            filtration methods.

     This controller supports 256KB, 1MB, or 4MB fast page mode SIMM's,
   80nsec or faster. Both sockets of a bank must be filled with the same
  size SIMM's; and at least one bank must be filled for proper operation.