OMTI 8640 Hard Disk/Floppy Controller Settings and Configuration

CONNECTIONS
Function	Location
34-pin data cable connector-floppy drive 1 & 2	J1
34-pin data cable connector-floppy drive 3 & 4	J2
20-pin data cable connector-drive 0	J3
20-pin data cable connector-drive 1	J4
34-pin control cable connector-hard drive	J5
4-pin connector-drive active LED	J6

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Floppy drive port address is 3F0-3F7h	W2	open
	Floppy drive port address is 370-377h	W2	closed
»	Hard drive port address is 1F0-1F7h	W3	open
	Hard drive port address is 170-177h	W3	closed
»	Floppy enabled	W5	open
	Floppy drive disabled	W5	closed
»	SPT-read from drive	W16	open
	SPT-calculate and set	W16	closed
»	Cache disabled	W17	open
	Cache enabled	W17	closed
»	Track Offset Cmd. and Data Strobe Offset disabled	W18	open
	Track Offset Cmd. and Data Strobe Offset enabled	W18	closed
»	Single speed floppy drive supported	W19	open
	Dual speed floppy drive Supported	W19	closed
»	Floppy connector (CN1) polarity active high	W20	pins 1 & 2 closed
	Floppy connector (CN1) polarity active low	W20	pins 2 & 3 closed
»	Floppy connector (CN1) polarity active high	W21	pins 1 & 2 closed
	Floppy connector (CN1) polarity active low	W21	pins 2 & 3 closed
»	BIOS enabled	W25	closed
	BIOS disabled	W25	open
»	Chassis not grounded	W28	open
	Chassis grounded	W28	closed
Note:W22, & W11-15 are not documented

BIOS ADDRESS
Address		Jumper W23	Jumper W24
»	C8000h	closed	closed
	CA000h	closed	open
	CC000h	open	closed
	CE000h	open	open