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

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 Acknowledge) (hard-wired)

JP1

pins 1 & 2 closed

 

DACK3 (Floppy drive DMA Acknowledge)

JP1

pins 2 & 3 closed

»

IRQ6 (Floppy drive Interrupt Request) (hard-wired)

JP2

pins 1 & 2 closed

 

IRQ10 (Floppy drive Interrupt Request)

JP2

pins 2 & 3 closed

»

IRQ14 (Hard drive Interrupt Request)

JP3

pins 1 & 2 closed

 

IRQ15 (Hard drive Interrupt Request)

JP3

pins 2 & 3 closed

»

DRQ2 (Floppy drive DMA Request) (hard-wired)

JP4

pins 1 & 2 closed

 

DRQ3 (Floppy drive DMA Request)

JP4

pins 2 & 3 closed

»

Hard drive port address is 1FO-1F7h

JP6

open

 

Hard drive port address is 17O-177h

JP6

closed

»

Floppy drive port address is 3F2-3F7h

JP7

open

 

Floppy drive port address is 372-377h

JP7

closed

»

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