NCL 538B Hard Disk/Floppy Controller Settings and Configuration

NCL AMERICA

NCL 538B

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