CONNECTIONS
Function	Location
50-pin SCSI cable connector-internal	CN1
50-pin SCSI cable connector-external	CN2
34-pin data cable connector-floppy drives	CN3
4-pin connector-drive active LED	CN4

USER CONFIGURABLE SETTINGS
Function		Location	Setting
»	Chip at U39 is -40A or -40B	JP1	pins 2 & 3 closed
	Chip at U39 is -25A	JP1	pins 1 & 2 closed
»	Floppy drive enabled	JP2	closed
	Floppy drive disabled	JP2	open
»	BIOS supports removable hard drives	JP11/jumper 5	open
	BIOS not support removable hard drives	JP11/jumper 5	closed
»	Hard drive enabled	JP12/jumper 1	open
	Hard drive disabled	JP12/jumper 1	closed
»	Hard drive port address is 1F0-1F7, 3F6-3F7h	JP12/jumper 1	open
	Hard drive port address is 170-177, 376 377h	JP12/jumper 1	closed
»	BIOS supports two hard drives	JP12/jumper 2	open
	BIOS supports seven hard drives	JP12/jumper 2	closed
»	Spindle motor starts on power-up	JP13/jumper 1	open
	Spindle motor starts on command only	JP13/jumper 1	closed
»	Synchronous negotiation initiated by host adapter	JP13/jumper 2	open
	Synchronous negotiation initiated by target	JP13/jumper 2	closed
»	SCSI parity check enabled	JP13/jumper 3	open
	SCSI parity check disabled	JP13/jumper 3	closed
»	Start Synchronous negotiation at 10MB/sec	JP13/jumper 4	open
	Start Synchronous negotiation at 5MB/sec	JP13/jumper 4	closed
	Reserved, must be left "open"	JP13/jumper 5	open
»	Third floppy supported with double-twisted cable	JP13/jumper 6	open
	Third floppy suppproted with single-twisted cable	JP13/jumper 6	closed
»	Floppy drive port address is 3F0-3F7h	JP13/jumper 7	open
	Floppy drive port address is 370-377h	JP13/jumper 7	closed
»	Command recovery time is 150 nsec	JP14/jumper 3*	open
	Command recovery time is 100 nsec	JP14/jumper 3*	closed
Note:*If AT-bus speed is > 6.7 MB/sec CMD recovery time is fixed at 100nsec.

DMA CHANNEL
Channel		JP11/jumper 1	JP11/jumper 2
»	5	open	open
	6	open	closed
	7	closed	open
	Reserved	closed	closed

INTERRUPT REQUEST
IRQ		JP11/jumper 3	JP11/jumper 4
»	14	open	closed
	15	open	open
	11	closed	open
	10	closed	closed

BIOS ADDRESS
Address		JP11/jumper 6	JP11/jumper 7	JP11/jumper 8
»	C8000h	open	closed	open
	Disabled	open	open	open
	C4000h	open	open	closed
	CC000h	open	closed	closed
	D0000h	closed	open	open
	D4000h	closed	open	closed
	D8000h	closed	closed	open
	DC000h	closed	closed	closed

HEAD MAPPING MODE
Mode		JP12/jumper 4	JP12/jumper 5
»	64 heads / 32 SPT	open	closed
	16 heads / 63 SPT	open	open
	64 heads / 63 SPT	closed	open
	64 heads / 32 SPT	closed	closed

SCSI ADDRESS
Address		JP12/jumper 6	JP12/jumper 7	JP12/jumper 8
	0	open	open	open
	1	open	open	closed
	2	open	closed	open
	3	open	closed	closed
	4	closed	open	open
	5	closed	open	closed
	6	closed	closed	open
»	7	closed	closed	closed

DMA SPEED SELECT
Speed		JP14/jumper 1	JP14/jumper 2
»	5MB/sec	open	open
	6.7MB/sec	open	closed
	8MB/sec	closed	open
	10MB/sec	closed	closed

BUS-ON CLOCK SPEED
Speed	JP13/jumper 8	JP14/jumper 4	JP14/jumper 5
11 m	open	open	open
9 m	open	open	closed
13 m	open	closed	open
15 m	open	closed	closed
2 m	closed	open	open
4 m	closed	open	closed
6 m	closed	closed	open
7 m	closed	closed	closed

I/O PORT ADDRESS
Address	JP14/jumper 6	JP14/jumper 7	JP14/jumper 8
330h	open	open	open
340h	open	open	closed
310h	open	closed	open
230h	open	closed	closed
240h	closed	open	open
210h	closed	open	closed
130h	closed	closed	open
140h	closed	closed	closed