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SDC802

STORAGE DIMENSIONS

SDC802

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

8-bit ISA

Card Size

Half-length, full-height

CONNECTIONS

Function

Location

Function

Location

25-pin SCSI connector - external

CN1

34-pin cable connector - floppy drive

CN3

50-pin SCSI connector - internal

CN2

   

BIOS ADDRESS SELECTION

Setting

JP1/1

JP1/2

JP1/3

JP1/4

JP1/5

JP1/6

JP1/7

JP1/8

C000h

Closed

Open

Open

Open

Open

Open

Open

Open

C400h

Open

Closed

Open

Open

Open

Open

Open

Open

C800h

Open

Open

Closed

Open

Open

Open

Open

Open

CC00h

Open

Open

Open

Closed

Open

Open

Open

Open

D000h

Open

Open

Open

Open

Closed

Open

Open

Open

D400h

Open

Open

Open

Open

Open

Closed

Open

Open

D800h

Open

Open

Open

Open

Open

Open

Closed

Open

DC00h

Open

Open

Open

Open

Open

Open

Open

Closed

Note:To disable BIOS remove chip U11 (not diagrammed).

INTERRUPT SELECTION

IRQ

JP2/1

JP2/2

JP2/3

JP2/4

JP2/5

 

IRQ3

Open

Closed

Open

Open

Open

 

IRQ4

Open

Open

Closed

Open

Open

 

IRQ5

Open

Open

Open

Closed

Open

 

IRQ7

Open

Open

Open

Open

Closed

IRQ9/None

Closed

Open

Open

Open

Open

WAIT STATE SELECTION

Setting

JP3/1

JP3/2

Normal

Closed

Open

 

Zero

Open

Closed

FLOPPY INTERFACE CONFIGURATION

Setting

JP4/1

JP4/2

Enabled

Open

Closed

 

Disabled

Closed

Open

FLOPPY DRIVE SPEED SELECTION

Setting

JP5/1

JP5/2

Single speed

Closed

Open

 

Dual speed

Open

Closed

FLOPPY DRIVE PRECOMPENSATION SELECTION

Setting

JP6/1

JP6/2

125ns

Closed

Open

 

187ns

Open

Closed

FLOPPY DRIVE STANDARD/IBM COMBO MODE SELECTION

Setting

JP7/1

JP7/2

IBM Combo card

Open

Closed

 

Standard

Closed

Open

MISCELLANEOUS TECHNICAL NOTES

Remove terminating resistors when connecting external and internal devices at the same time.