
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

