ULTRASTOR CORPORATION

12F/12

Data Bus                16-bit ISA
Card Size               Three-quarter length, half-height card
Hard Drives supported   Two ESDI drives
Floppy drives supported Two 360KB, 720KB, 1.2MB, or 1.44MB drives

[Image]

                                CONNECTIONS

       Function           Location          Function           Location

  34-pin cable               J1         20-pin cable              J4
  connector - floppy                    connector - drive
  drive                                 0

  4-pin connector -          J2         34-pin control            J5
  drive active LED                      cable connector -
                                        hard drive

  20-pin cable               J3
  connector - drive 1

                        USER CONFIGURABLE SETTINGS

                Function                    Label           Position

  »   Factory configured - do not alter      JP1          Unidentified

  »   Factory configured - do not alter      JP3             Closed

  »   On-board cache enabled                 JP4              Open

      On-board cache disabled                JP4       Pins 3 & 4 closed

  »   Factory configured - do not alter      JP9              Open

  »   Third floppy drive with twisted       JP11/1            Open
      cable - jumper drive as DS2

      Third floppy drive with straight      JP11/1           Closed
      cable - jumper drive as DS4

  »   Drive 1 AT configured                 JP11/2            Open

      Drive 1 3.5 inch PS/2 configured      JP11/2           Closed
      (different pin 2 polarity)

  »   Drive 0 AT configured                 JP11/3            Open

      Drive 0 3.5 inch PS/2 configured      JP11/3           Closed
      (different pin 2 polarity)

  »   Floppy drive primary address is       JP11/4            Open
      3F0h

      Floppy drive secondary address is     JP11/4           Closed
      370h

  »   Single speed floppy drive enabled     JP11/5            Open

      Dual speed floppy drive enabled       JP11/5           Closed

  »   Precomp varies according to           JP11/6            Open
      floppy data rate

      Precomp is 125 ns                     JP11/6           Closed

  »   Hard drive primary address select      JP12             Open
      (1F0-1F7h)

      Hard drive secondary address           JP12            Closed
      select (170-177h)

                  USER CONFIGURABLE SETTINGS (CONTINUED)

                  Function                      Label        Position

  »   Chassis ground not connected to logic     JP16           Open
      ground

      Chassis ground connected to logic         JP16          Closed
      ground

      Floppy interface disabled                 JP17           Open

      Floppy interface enabled                  JP17          Closed

  »   IRQ 14 select                             JP20         Pins 2 & 3
                                                              closed

      IRQ 15 select                             JP20         Pins 1 & 2
                                                              closed

  Note: Jumpers JP1 and JP9 are removed on revision B00. Location of
  jumper JP16 is unidentified.

                            CACHE CONFIGURATION

       Data buffer                  JP5                      JP6

  »           8KB            Pins 2 & 3 closed        Pins 1 & 2 closed

             32KB            Pins 1 & 2 closed        Pins 1 & 2 closed

                          BIOS ADDRESS SELECTION

        Address          JP10/pins 1 &    JP10/pins 3 &     JP10/pins 5 &
                               2                4                6

  »        C8000h            Open             Open             Closed

           CC000h            Open            Closed             Open

           D0000h            Open            Closed            Closed

           D4000h           Closed            Open              Open

           D8000h           Closed            Open             Closed

           DC000h           Closed           Closed             Open

          Disabled           Open             Open              Open