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