UNIDENTIFIED

TC1711

Data Bus:                16-bit ISA
Size:                    Mid-length, full-height card
Hard drives supported:   2 ST506/412 (MFM) drives
Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB drives

[Image]

                         CONNECTIONS

                  Function                      Location

  34-pin control cable hard drive                  CN1

  20-pin data connector for hard disk 0            CN2

  20-pin data connector for hard disk 1            CN3

  34-pin data cable connector-floppy drive         CN4

  4-pin connector-drive active LED                 CN5

                             FACTORY SETTINGS

             Function                 W1        W2        W3        W4

  »   2KB RAM buffer (Hard wired     1 & 2     1 & 2     1 & 2     1 & 2
      no jumper)

      32KB RAM buffer (Requires      2 & 3     2 & 3     2 & 3     2 & 3
      firmware)

  Note: Pins designated are in the closed position.

                        USER CONFIGURABLE SETTINGS

               Function                     Location          Setting

  »   Hard drive enabled                       W5            Pins 2 & 3
                                                              closed

      Hard drive disabled                      W5            Pins 1 & 2
                                                              closed

  »   Floppy precompensation auto set          W6            Pins 2 & 3
      by data rate.                                           closed

      Floppy precompensation fixed at          W6            Pins 1 & 2
      125ns                                                   closed

  »   Floppy drive single speed                W7            Pins 2 & 3
      select                                                  closed

      Floppy drive dual speed select           W7            Pins 1 & 2
                                                              closed

                        USER CONFIGURABLE SETTINGS

               Function                     Location          Setting

  »   Floppy port address 1F0h-1F7h,           W8               Open
      3F0h-3F7h

      Floppy port address 170h-17Fh,           W8              Closed
      370h-37Fh

  »   Hard disk port address                   W11              Open
      3F0h-3FFh

      Hard disk port address                   W11             Closed
      370h-37Fh

                        FLOPPY DRIVE CONFIGURATION

               Function                       W9               W10

  »   Floppy drive enabled                  Closed            Closed

      Floppy drive disabled                  Open              Open