DATA TECHNOLOGY CORPORATION

DTC520DB

Data Bus                SASI
Card Size               146 x 203mm
Hard Drives Supported   Two ST506/412-MFM devices
Floppy Drives Supported Four 360KB drives

[Image]

                                CONNECTIONS

         Function            Label            Function            Label

  50-pin SASI connector -      J1      20-pin hard drive data      J4
  to SASI controller                   cable

  34-pin hard drive            J2      34-pin cable connector      J7
  control cable                        - floppy drive

  20-pin hard drive data       J3      4-pin DC power in           J10
  cable

                        USER CONFIGURABLE SETTINGS

                  Setting                     Label         Position

  »   SASI bus terminated                       T1          Installed

      SASI bus not terminated                   T1        Not installed

  »   SASI bus parity enabled                   W1          Pins 1 & 2
                                                             closed

      SASI bus parity disabled                  W1          Pins 2 & 3
                                                             closed

  »   Logical Unit Number 0 is assigned         W5            Open
      to hard drive

      Logical Unit Number 0 is assigned         W5           Closed
      to floppy drive

  »   Logical Unit Number 1 is assigned         W6           Closed
      to floppy drive

      Logical Unit Number 1 is assigned         W6            Open
      to hard drive

  »   Factory configured - do not alter         W7           Closed

  »   Factory configured - do not alter         W8           Closed

  »   Motor On signal normal                   W14            Open

      Motor On signal forced high              W14           Closed

  »   Floppy drive not always considered       W15            Open
      ready

      Floppy drive always considered           W15           Closed
      ready

  »   Factory configured - do not alter        W31            Open

  »   Factory configured - do not alter        W32          Pins 1 & 2
                                                             closed

                           SASI BUS ADDRESS SELECTION

  Setting   W0/A     W0/B     W0/C     W0/D     W0/E    W0/F     W0/G     W0/H

  »    0    Closed   Open     Open     Open     Open    Open     Open     Open

       1    Open    Closed    Open     Open     Open    Open     Open     Open

       2    Open     Open    Closed    Open     Open    Open     Open     Open

       3    Open     Open     Open    Closed    Open    Open     Open     Open

       4    Open     Open     Open     Open    Closed   Open     Open     Open

       5    Open     Open     Open     Open     Open    Closed   Open     Open

       6    Open     Open     Open     Open     Open    Open     Closed   Open

       7    Open     Open     Open     Open     Open    Open     Open     Closed

                           SECTOR SIZE SELECTION

          Setting                     W3                      W4

            128 bytes                Open                    Open

  »         256 bytes               Closed                   Open

            512 bytes                Open                   Closed

           1024 bytes               Closed                  Closed