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NCL 5475, NCL 5476

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

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 only)

CN4

4-pin connector-drive active LED

CN5

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Hard drive port address is 1F0-1F7h

JP1

pins 1 & 2 closed

 

Hard drive port address is 170-177h

JP1

pins 2 & 3 closed

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

JP2

closed

 

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

JP2

open

Unit select turn on the LED

JP6

open

 

Drive select turn on the LED

JP6

closed

Hard Drive Interrupt is IRQ14 (Hard-wired)

JP9

pins 2 & 3 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.