NEC TECHNOLOGIES, INC.

FD850MEX (CDXT003FD)

Card Type

Hard drive controller

Hard Drives supported

Up to 7 SCSI devices

Floppy drives supported

None

Data Bus

8-bit ISA

Card Size

Half-length, full-height

CONNECTIONS

Function

Label

Function

Label

50-pin SCSI connector - internal

J2

25-pin SCSI connector - external

P1

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Zero wait state disabled

W5

Open

 

Zero wait state enabled

W5

Closed

MEMORY ADDRESS SELECTION

Setting

W1

W2

W3

»

CA000h

Open

Open

Pins 1 & 2, 3 & 4 closed

 

C8000h

Closed

Open

Pins 1 & 2, 3 & 4 closed

 

CE000h

Open

Closed

Pins 1 & 2, 3 & 4 closed

 

DE000h

Closed

Closed

Pins 1 & 2, 3 & 4 closed

 

E8000h

Open

Open

Pins 1 & 3, 2 & 4 closed

 

EC000h

Open

Closed

Pins 1 & 3, 2 & 4 closed

INTERRUPT SELECTION

Setting

W6(pins 1 & 2)

W7(pins 2 & 3)

IRQ3

Closed

Open

IRQ5

Open

Closed