
DATA TECHNOLOGY CORPORATION

DTC3280A, DTC3280AS (400480-89XX)

Data bus: 16-bit, ISA.

Size: Half-length, full-height card.

Hard drives supported: Up to seven SCSI devices

Floppy drives supported: DTC3180A: None

DTC3280A: Four 360KB, 720KB, 1.2MB or 1.44 MB drives

[Image]

                                CONNECTIONS

                     Function                             Location

  50-pin SCSI connector-external                             J1

  50-pin SCSI connector-internal                             J2

  34-pin data cable connector-floppy drive                   J3
  (DTC3280A and AS only)

  4-pin connector-drive active LED                           J4

                        USER CONFIGURABLE SETTINGS

               Function                     Location           Setting

     Single-speed floppy supported       SW1/switch 7           off

      Dual-speed floppy supported         SW1/switch 7           on

     PS/2-type floppy on Drive           SW1/switch 8           on
      Select 2 not supported

      PS/2-type floppy drive on Drive     SW1/switch 8           off
      Select 2 supported

     Floppy drive precomp. is scaled     SW1/switch 9           off
      by data rate:

      500KHz=125ns, 300KHz=208ns,
      250KHz=250ns

      Floppy drive precompensation is     SW1/switch 9           on
      125ns

     Floppy drive enabled                SW1/switch 10          on

      Floppy drive disabled               SW1/switch 10          off

     Factory configured - do not         SW2/switch 3           off
      alter

     Factory configured - do not         SW2/switch 4           off
      alter

     SCSI parity check enabled           SW2/switch 5           off

      SCSI parity check disabled          SW2/switch 5           on

     2KB SRAM selected                        W1             pins 2 & 3
                                                               closed

      8KB SRAM selected                        W1             pins 1 & 2
                                                               closed

     Floppy drive address 3F2-3F7h            W2             pins 1 & 2
                                                               closed

      Floppy drive address 372-377h            W2             pins 2 & 3
                                                               closed

                  INQUIRY INTERRUPT REQUEST "B " OPTIONS

      IRQ          SW1/switch    SW1/switch     SW1/switch   SW1/switch 4
                       1             2              3

      IRQ11          off           off            on            off

       IRQ10          off           off            off            on

       IRQ12          off            on            off           off

       IRQ15          on            off            off           off

      Disabled        off           off            off           off

                               BIOS ADDRESS

         Address               SW1/switch 5             SW1/switch 6

           D800h                  off                      off

            C800h                  off                       on

            DC00h                   on                      off

            CC00h                   on                       on

                             INTERRUPT REQUEST

           IRQ                 SW2/switch 1             SW2/switch 2

           IRQ11                  off                       on

            IRQ12                   on                      off

            IRQ10                   on                       on

            IRQ15                  off                      off

                               SCSI ADDRESS

    SCSI ID        SW2/switch 6       SW2/switch 7        SW2/switch 8

         0              on                 on                  on

         1             off                 on                  on

         2              on                 off                 on

         3             off                 off                 on

         4              on                 on                  off

         5             off                 on                  off

         6              on                 off                 off

        7             off                 off                 off

