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COM/4I, COM/8I

DIGI INTERNATIONAL, INC.

COM/4I, COM/8I

Card Type

Serial

Processor

80C186

Processor Speed

10MHz

Chipset

Unidentified

Maximum Onboard Memory

256KB RAM

I/O Options

Serial ports (4 for COM/4i, 8 for COM/8i)

Data Bus

8/16 bit ISA

Card Size

Full height, full length

CONNECTIONS

Function

Label

Function

Label

Header to daughterboard H1B

H1A

Header to main board H2A (on back of card)

H2B

Header to main board H1A (on back of card)

H1B

RS-232, RS-422, or RS-485 serial ports via DB-78 connector

P1

Header to daughterboard H2B

H2A

   

Note:Standard serial ports are provided on an external expansion box.

The types of serial ports provided are configured at the factory and are not user-configurable.

USER CONFIGURABLE SETTINGS

Setting

Label

Position

Factory configured - do not alter

J17

Pins 2 & 3 closed

BASE I/O ADDRESS SELECTION

Setting

J2

J3

J4

100h

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

110h

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

120h

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

200h

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

220h

Pins 1 & 2 closed

Pins 2 & 3 closed

Pins 1 & 2 closed

300h

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

320h

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

INTERRUPT SELECTION

Setting

J5

J6

J7

J8

J9

 

2/9

Open

Open

Open

Open

Open

 

3

Open

Open

Open

Open

Open

 

4

Open

Open

Open

Open

Open

 

5

Open

Open

Open

Open

Open

 

6

Open

Open

Open

Open

Open

 

7

Open

Open

Open

Open

Closed

 

10

Open

Open

Open

Closed

Open

 

11

Open

Open

Closed

Open

Open

 

12

Open

Closed

Open

Open

Open

 

15

Closed

Open

Open

Open

Open

Disabled

Open

Open

Open

Open

Open

INTERRUPT SELECTION (CON'T)

Setting

J10

J11

J12

J13

J14

 

2/9

Open

Open

Open

Open

Closed

 

3

Open

Open

Open

Closed

Open

 

4

Open

Open

Closed

Open

Open

 

5

Open

Closed

Open

Open

Open

 

6

Closed

Open

Open

Open

Open

 

7

Open

Open

Open

Open

Open

 

10

Open

Open

Open

Open

Open

 

11

Open

Open

Open

Open

Open

 

12

Open

Open

Open

Open

Open

 

15

Open

Open

Open

Open

Open

Disabled

Open

Open

Open

Open

Open

SHARED MEMORY ADDRESS SELECTION

Setting

J15

J16

0C0000h

Pins 2 & 3 closed

Pins 2 & 3 closed

0C8000h

Pins 2 & 3 closed

Pins 1 & 2 closed

0D0000h

Pins 1 & 2 closed

Pins 2 & 3 closed

0D8000h

Pins 1 & 2 closed

Pins 1 & 2 closed

EPROM SIZE SELECTION

Setting

JP1

JP2

8KB

Pins 1 & 2 closed

Pins 1 & 2 closed

 

16KB

Pins 1 & 2 closed

Pins 1 & 2 closed

 

32KB

Pins 1 & 2 closed

Pins 2 & 3 closed

 

64KB

Pins 2 & 3 closed

Pins 2 & 3 closed