NCL 5475, NCL 5476 Hard Disk/Floppy Controller Settings and Configuration

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.