SDC1602 Hard Disk/Floppy Controller Settings and Configuration

Card Type	Hard drive controller
Hard Drives supported	Up to 7 SCSI-1 devices
Floppy drives supported	Two 360KB, 720KB, 1.2MB, or 1.44MB drives
Data Bus	16-bit ISA
Card Size	Half-length, full-height

CONNECTIONS
Function	Location	Function	Location
50-pin SCSI connector - external	CN1	4-pin connector - drive active LED	CN4
50-pin SCSI connector - internal	CN2	SCSI active LED	CN5
34-pin cable connector - floppy drive	CN3

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Synchronous negotiation initiation disabled	J5/1	Open
	Synchronous negotiation initiation enabled	J5/1	Closed
»	Factory configured - do not alter	J5/2	Open
»	SCSI parity check disabled	J5/3	Closed
	SCSI parity check enabled	J5/3	Open
»	SCSI BIOS enabled	J6/1	Closed
	SCSI BIOS disabled	J6/1	Open
»	Factory configured - do not alter	J6/2	Unidentified
»	Factory configured - do not alter	J6/3	Unidentified
»	Factory configured - do not alter	J6/4	Unidentified
»	SCSI auto sense enabled	J6/5	Open
	SCSI auto sense disabled	J6/5	Closed
»	Floppy interface address 3F0h enabled	J7/1	Open
	Floppy interface address 370h enabled	J7/1	Closed
»	Floppy drive interface enabled	J8/1	Closed
	Floppy drive interface disabled	J8/1	Open
»	Floppy drive dual speed disabled	J8/8	Open
	Floppy drive dual speed enabled	J8/8	Closed
Note:Disable BIOS when SDC1602A is a secondary card in the system.

SCSI ID SELECTION
SCSI ID		J5/4	J5/5	J5/6
	0	Closed	Closed	Closed
	1	Open	Closed	Closed
	2	Closed	Open	Closed
	3	Open	Open	Closed
	4	Closed	Closed	Open
	5	Open	Closed	Open
	6	Closed	Open	Open
»	7	Open	Open	Open

DMA CHANNEL SELECTION (1)
Channel		J5/7	J5/8
	0	Closed	Closed
»	5	Open	Closed
	6	Closed	Open
	7	Open	Open

FLOPPY INTERFACE DMA SELECTION
Channel		J8/2	J8/3	J8/4	J8/5
»	2	Closed	Open	Closed	Open
	3	Open	Closed	Open	Closed

DMA TRANSFER SPEED SELECTION
Setting		J5/12	J5/13
»	5.0 MB/sec	Open	Open
	5.7 MB/sec	Closed	Open
	6.7 MB/sec	Open	Closed
	8.0 MB/sec	Closed	Closed

DMA CHANNEL SELECTION (2)
Channel		J9/1	J9/2	J9/3	J9/4	J9/5	J9/6	J9/7	J9/8
	0	Closed	Open	Open	Open	Closed	Open	Open	Open
»	5	Open	Closed	Open	Open	Open	Closed	Open	Open
	6	Open	Open	Closed	Open	Open	Open	Closed	Open
	7	Open	Open	Open	Closed	Open	Open	Open	Closed
Note: Settings must match J5 settings (DMA table 1).

BASE I/O ADDRESS SELECTION
Setting		J7/2	J7/3	J7/4
	130	Closed	Open	Closed
	134	Open	Open	Closed
	230	Closed	Closed	Open
	234	Open	Closed	Open
»	330	Closed	Open	Open
	334	Open	Open	Open

BIOS ADDRESS SELECTION
Setting		J7/7	J7/8
	C800h	Closed	Closed
	CC00h	Closed	Open
	D800h	Open	Closed
»	DC00h	Open	Open

FLOPPY DRIVE INTERRUPT SELECTION
IRQ		J8/6	J8/7
»	IRQ6	Closed	Open
	IRQ10	Open	Closed

INTERRUPT SELECTION (1)
IRQ		J5/9	J5/10	J5/11
	IRQ9	Open	Open	Open
	IRQ10	Closed	Open	Open
»	IRQ11	Open	Closed	Open
	IRQ12	Closed	Closed	Open
	IRQ14	Open	Open	Closed
	IRQ15	Closed	Open	Closed

INTERRUPT SELECTION (2)
IRQ		J9/9	J9/10	J9/11	J9/12	J9/13	J9/14
	IRQ9	Closed	Open	Open	Open	Open	Open
	IRQ10	Open	Closed	Open	Open	Open	Open
»	IRQ11	Open	Open	Closed	Open	Open	Open
	IRQ12	Open	Open	Open	Closed	Open	Open
	IRQ14	Open	Open	Open	Open	Closed	Open
	IRQ15	Open	Open	Open	Open	Open	Closed
Note:The above settings must match J5 settings (interrupt selection table 1).

IOCHRDY WAIT STATE SELECTION
Setting		J7/5	J7/6
»	Disabled	Open	Open
	100ns	Closed	Open
	200ns	Open	Closed
	300ns	Closed	Closed

MISCELLANEOUS TECHNICAL NOTES

Remove terminating resistors when connecting external and internal devices.