
ADVANCED STORAGE CONCEPTS

ASC-88

Card Type               Hard drive controller card
Hard Drives supported   Up to 7 SCSI devices
Floppy drives supported None
Data Bus                8-bit ISA
Card Size               Quarter-length, full-height card

[Image]

                                CONNECTIONS

       Function          Location           Function          Location

  50-pin SCSI               CN1        Terminating             RN1-RN3
  connector -                          resistors
  external

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

     Power to external pull-ups            BUS-PWR          Pins 1 & 2
      disabled                                                closed

      +5V power to external pull-ups        BUS-PWR          Pins 3 & 4
      enabled                                                 closed

                         SEGMENT ADDRESS SELECTION

   Setting             A16                  A15                 A14

    C000h       Pins 1 & 2 closed    Pins 1 & 2 closed       Pins 1 & 2
                                                              closed

    C400h       Pins 1 & 2 closed    Pins 1 & 2 closed       Pins 2 & 3
                                                              closed

    C800h       Pins 1 & 2 closed    Pins 2 & 3 closed       Pins 1 & 2
                                                              closed

    CC00h       Pins 1 & 2 closed    Pins 2 & 3 closed       Pins 2 & 3
                                                              closed

    D000h       Pins 2 & 3 closed    Pins 1 & 2 closed       Pins 1 & 2
                                                              closed

    D400h       Pins 2 & 3 closed    Pins 1 & 2 closed       Pins 2 & 3
                                                              closed

    D800h       Pins 2 & 3 closed    Pins 2 & 3 closed       Pins 1 & 2
                                                              closed

    DC00h       Pins 2 & 3 closed    Pins 2 & 3 closed       Pins 2 & 3
                                                              closed

                                   Note:

  A total of 8 segment address settings are available. The settings are a
  binary representation of the hexidecimal segment addresses. A16 is the
  Most Significant Bit and switch A14 is the Least Significant Bit. The
  jumpers have the following decimal values: A16=1000h, A15=800h, and
  A14=400h. Turn off the jumpers by closing pins 1 & 2 and turn on the
  jumpers by closing pins 2 & 3. Add the values of the jumpers with pins
  2 & 3 closed to obtain the correct memory address. (Pins 1 & 2 = Off,
  Pins 2 & 3 = On.)

