STORAGE DIMENSIONS

SDC802

Card Type               Hard drive controller
Hard Drives supported   Up to 7 SCSI-1 devices
Floppy drives supported Two 360KB, 720KB, 1.2MB, or 1.44MB drives
Data Bus                8-bit ISA
Card Size               Half-length, full-height

[Image]

                                CONNECTIONS

        Function           Location          Function           Location

  25-pin SCSI connector      CN1      34-pin cable connector      CN3
  - external                          - floppy drive

  50-pin SCSI connector      CN2
  - internal

                             BIOS ADDRESS SELECTION

  Setting   JP1/1   JP1/2    JP1/3    JP1/4    JP1/5    JP1/6    JP1/7    JP1/8

  C000h     Closed   Open     Open     Open     Open    Open     Open     Open

  C400h     Open    Closed    Open     Open     Open    Open     Open     Open

  C800h     Open     Open    Closed    Open     Open    Open     Open     Open

  CC00h     Open     Open     Open    Closed    Open    Open     Open     Open

  D000h     Open     Open     Open     Open    Closed   Open     Open     Open

  D400h     Open     Open     Open     Open     Open    Closed   Open     Open

  D800h     Open     Open     Open     Open     Open    Open     Closed   Open

  DC00h     Open     Open     Open     Open     Open    Open     Open     Closed

            Note:To disable BIOS remove chip U11 (not diagrammed).

                            INTERRUPT SELECTION

       IRQ           JP2/1      JP2/2      JP2/3       JP2/4      JP2/5

         IRQ3         Open      Closed      Open       Open       Open

         IRQ4         Open       Open      Closed      Open       Open

         IRQ5         Open       Open       Open      Closed      Open

         IRQ7         Open       Open       Open       Open      Closed

  »    IRQ9/None     Closed      Open       Open       Open       Open

                           WAIT STATE SELECTION

          Setting                    JP3/1                  JP3/2

  »          Normal                 Closed                   Open

              Zero                   Open                   Closed

                      FLOPPY INTERFACE CONFIGURATION

           Setting                    JP4/1                 JP4/2

  »          Enabled                  Open                  Closed

             Disabled                Closed                  Open

                       FLOPPY DRIVE SPEED SELECTION

          Setting                    JP5/1                  JP5/2

  »       Single speed              Closed                   Open

           Dual speed                Open                   Closed

                  FLOPPY DRIVE PRECOMPENSATION SELECTION

          Setting                   JP6/1                   JP6/2

  »          125ns                  Closed                  Open

             187ns                   Open                  Closed

              FLOPPY DRIVE STANDARD/IBM COMBO MODE SELECTION

           Setting                    JP7/1                 JP7/2

  »       IBM Combo card              Open                  Closed

             Standard                Closed                  Open

                       MISCELLANEOUS TECHNICAL NOTES

  Remove terminating resistors when connecting external and internal
  devices at the same time.