
NCL AMERICA

NCL 538B

Data bus: 16-bit, ISA

Size: Half-length, full-height card

Hard drives supported: Two AT Interface (IDE) drives

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

[Image]

                          CONNECTIONS

                   Function                       Location

  34-pin control cable connector-floppy drive        CN3

  40-pin AT Interface (IDE) connector                CN4

  4-pin connector-drive active LED                  CN10

                        USER CONFIGURABLE SETTINGS

                Function                    Location          Setting

     DACK2 (Floppy drive DMA                 JP1            pins 1 & 2
      Acknowledge) (hard-wired)                               closed

      DACK3 (Floppy drive DMA                 JP1            pins 2 & 3
      Acknowledge)                                            closed

     IRQ6 (Floppy drive Interrupt            JP2            pins 1 & 2
      Request) (hard-wired)                                   closed

      IRQ10 (Floppy drive Interrupt           JP2            pins 2 & 3
      Request)                                                closed

     IRQ14 (Hard drive Interrupt             JP3            pins 1 & 2
      Request)                                                closed

      IRQ15 (Hard drive Interrupt             JP3            pins 2 & 3
      Request)                                                closed

     DRQ2 (Floppy drive DMA Request)         JP4            pins 1 & 2
      (hard-wired)                                            closed

      DRQ3 (Floppy drive DMA Request)         JP4            pins 2 & 3
                                                              closed

     Hard drive port address is              JP6              open
      1FO-1F7h

      Hard drive port address is              JP6             closed
      17O-177h

     Floppy drive port address is            JP7              open
      3F2-3F7h

      Floppy drive port address is            JP7             closed
      372-377h

     Normal operation                        JP8              open

      Diagnostic mode                         JP8             closed

     Zero wait state disabled                JP9              open

      Zero wait state enabled                 JP9             closed

     BIOS enabled                            JP11            closed

      BIOS disabled                           JP11             open

                               BIOS ADDRESS

          Address                 Jumper JP5             Jumper JP5A

            C800h                   open                   open

             CC00h                  closed                  open

             D800h                   open                  closed

             DC00h                  closed                 closed

                MISCELLANEOUS TECHNICAL NOTES

  Debug: G=C800:5 sets up custom parameters for IDE drives

