NCL AMERICA

NCL 5455, NCL 5456

  Data bus:                  16-bit, ISA

  Size:                      Half-length, full-height card

  Hard drives supported:     Two ST506/412 MFM drives

  Floppy drives supported:   NCL 5455: Two 360 KB, 720 KB, 1.2 MB or 1.44
                             MB drives

                             NCL 5456: None

[Image]

                                CONNECTIONS

  34-pin control cable connector-hard drive                     CN1

  20-pin data cable connector-drive 0                           CN2

  20-pin data cable connector-drive 1                           CN3

  34-pin data cable connector-floppy drive (NCL 5455            CN4
  only)

  4-pin connector-drive active LED                              CN5

  5-pin DC power connector                                      CN6

                        USER CONFIGURABLE SETTINGS

              Function                    Location            Setting

  »   Hard drive address is                  JP1             pins 1 & 2
      1F0-1F7h                                                closed

      Hard drive address is                  JP1             pins 2 & 3
      170-177h                                                closed

  »   32Kb ROM enabled                       JP2             pins 1 & 2
                                                              closed

      16Kb ROM enabled                       JP2             pins 2 & 3
                                                              closed

                        USER CONFIGURABLE SETTINGS

              Function                    Location            Setting

  »   Floppy drive port address is           JP7              closed
      3F2-3F7h

      Floppy drive port address is           JP7               open
      372-377h

  »   Cache enabled                         JP11               open

      Cache disabled                        JP11              closed

      4Kb buffer enabled                    JP12               open

      16Kb buffer enabled                   JP12              closed

      4Kb buffer size selected         JP14, JP15, JP16      pins 1 & 2
                                                              closed

      16Kb buffer size selected        JP14, JP15, JP15      pins 2 & 3
                                                              closed

                       MISCELLANEOUS TECHNICAL NOTES

  All other jumpers are for factory tests and configured as follows: JP4,
  JP5 - closed; JP6, JP8, JP13 - open; JP9, JP10 - pins 2 & 3 closed - do
                                not alter.