NCL AMERICA

NCL 5475, NCL 5476

Data bus: 16-bit, ISA

Size: Half-length, full-height card

Hard drives supported: Two ST506/412 MFM drives

Floppy drives supported: NCL 5475: Two 360KB, 720KB, 1.2MB, or 1.44MB

NCL 5476: 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 5475            CN4
  only)

  4-pin connector-drive active LED                              CN5

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

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

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

  »   Floppy drive port address is            JP2             closed
      3F2-3F7h (5475 only)

      Floppy drive port address is            JP2              open
      372-377h (5475 only)

  »   Unit select turn on the LED             JP6              open

      Drive select turn on the LED            JP6             closed

  »   Hard Drive Interrupt is IRQ14           JP9            pins 2 & 3
      (Hard-wired)                                            closed

      Hard Drive Interrupt is IRQ15           JP9            pins 1 & 2
                                                              closed

                       MISCELLANEOUS TECHNICAL NOTES

   Jumpers JP3, JP4, JP5, JP7, and JP8 are factory configured in the open
                         position - do not alter.