Category

Serial controller

Chipset Controller

NEC

I /O Options Supported

Serial ports (16)

Maximum Onboard Memory

512KB

CONNECTIONS

Purpose

Location

Purpose

Location

100-pin serial interface connector

CN1

8-port module connector

CN4

8-port upgrade card connector

CN2

8-port module connector

CN5

8-port upgrade card connector

CN3

RS-232/RS-422 SELECT - JP1-JP8

Setting

Jumper A

Jumper B

Jumper C

Jumper D

»

RS-232

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

RS-422

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Note: JP1-JP8 correspond to serial ports 1 - 8, respectively.

PORT 1 FULL/HALF DUPLEX SELECT

Setting

FD1

Half-duplex mode

Pins 1 & 2 closed

Full-duplex mode (DMA1)

Pins 2 & 3 closed

PORT 2 FULL/HALF DUPLEX SELECT

Setting

FD2

Half-duplex mode

Pins 1 & 2 closed

Full-duplex mode (DMA2)

Pins 2 & 3 closed

PORTS 1 & 2 RS-232 SYNCHRONOUS/ASYNCHRONOUS SELECT - JP9

Setting

Jumper A - Jumper E

Jumper F - Jumper M

Asynchronous

Pins 1 & 2 closed

Pins 1 & 2 closed

Synchronous

Pins 2 & 3 closed

Pins 1 & 2 closed

PORT 1 DATA TERMINAL READY (DTR) OPTIONS

Setting

JP14

JP15

»

Normal RS-232

Closed

Open

Synchronous RS-232

Open

Closed

PORT 2 DATA TERMINAL READY (DTR) OPTIONS

Setting

JP16

JP17

»

Normal RS-232

Closed

Open

Synchronous RS-232

Open

Closed

I/O ADDRESS

Setting

SW1/1

SW1/2

SW1/3

»

218h

Off

Off

Off

21Ch

On

Off

Off

238h

Off

On

Off

23Ch

On

On

Off

318h

Off

Off

On

31Ch

On

Off

On

338h

Off

On

On

33Ch

On

On

On

PORTS 9 - 15 RS-232/RS-422 SELECT - JP18-JP25

Setting

Jumper A

Jumper B

Jumper C

Jumper D

»

RS-232

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

RS-422

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Note: JP18-JP25 correspond to serial ports 9 - 15, respectively.

DRAM CONFIGURATION

Memory Size

Bank 0

»

128KB

(2) 64K x 9

512KB

(2) 128M x 9