UNIDENTIFIED

EXPERT TOP HFDC

  Data bus:                16-bit ISA

  Size:                    Three/quarter-length, full-height card

  Hard drive supported:    Two MFM ST506/412 drives

  Floppy drives            Two 360KB, 720KB, 1.2MB, 1.44MB drives
  supported:

[Image]

                            CONNECTIONS

                   Function                          Location

  34-pin control cable connector - hard drive           J1

  20-pin data cable connector - drive 1                 J2

  20-pin data cable connector - drive 0                 J3

  34-pin connector - floppy drive interface             J4

  2-pin connector - drive active LED                    J6

                        USER CONFIGURABLE SETTINGS

                 Function                     Location        Setting

  »   Floppy drive interface operates at         W1          pins 1 & 2
      360 RPM                                                  closed

      Floppy drive interface operates at         W1          pins 2 & 3
      300 RPM                                                  closed

  »   Floppy drive is primary in system          W4          pins 2 & 3
      (3F2 - 3F7h)                                             closed

      Floppy drive is secondary in system        W4          pins 1 & 2
      (372 - 377h)                                             closed

  »   ST506/412(MFM) interface is primary        W6          pins 2 & 3
      in system (1F0 - 1F7h)                                   closed

      ST506/412(MFM) interface is                W6          pins 1 & 2
      secondary in system (170 - 177h)                         closed