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I/O EXPANDER 2S

SIIG, INC.

I/O EXPANDER 2S

Card Type

Serial card

Chipset Controller

16550

I/O Options

Serial ports (2)

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

25-pin serial port

SE1

9-pin serial port

SE2

SERIAL PORT 1 CONFIGURATION

COM

S2/A

S2/B

S2/C

S2/D

COM1 (3F8h-3FFh)

Open

Open

Open

Closed

 

COM2 (2F8h-2FFh)

Open

Open

Closed

Open

 

COM3 (3E8h-3EFh)

Open

Closed

Open

Open

 

COM4 (2E8h-2EFh)

Closed

Open

Open

Open

 

Disabled

Open

Open

Open

Open

SERIAL PORT 1 INTERRUPT SELECTION

IRQ

JP3/A

JP3/B

JP3/C

JP3/D

JP3/E

JP3/F

JP3/G

JP3/H

JP3/I

4

Open

Closed

Open

Open

Open

Open

Open

Open

Open

 

2/9

Open

Open

Open

Open

Closed

Open

Open

Open

Open

 

3

Closed

Open

Open

Open

Open

Open

Open

Open

Open

 

5

Open

Open

Closed

Open

Open

Open

Open

Open

Open

 

7

Open

Open

Open

Closed

Open

Open

Open

Open

Open

 

10

Open

Open

Open

Open

Open

Closed

Open

Open

Open

 

11

Open

Open

Open

Open

Open

Open

Closed

Open

Open

 

12

Open

Open

Open

Open

Open

Open

Open

Closed

Open

 

15

Open

Open

Open

Open

Open

Open

Open

Open

Closed

 

Disabled

Open

Open

Open

Open

Open

Open

Open

Open

Open

SERIAL PORT 2 CONFIGURATION

COM

S1/A

S1/B

S1/C

S1/D

COM2 (2F8h-2FFh)

Open

Open

Closed

Open

 

COM1 (3F8h-3FFh)

Open

Open

Open

Closed

 

COM3 (3E8h-3EFh)

Open

Closed

Open

Open

 

COM4 (2E8h-2EFh)

Closed

Open

Open

Open

 

Disabled

Open

Open

Open

Open

SERIAL PORT 2 INTERRUPT SELECTION

IRQ

JP1/A

JP1/B

JP1/C

JP1/D

JP1/E

JP1/F

JP1/G

JP1/H

JP1/I

3

Closed

Open

Open

Open

Open

Open

Open

Open

Open

 

2/9

Open

Open

Open

Open

Closed

Open

Open

Open

Open

 

4

Open

Closed

Open

Open

Open

Open

Open

Open

Open

 

5

Open

Open

Closed

Open

Open

Open

Open

Open

Open

 

7

Open

Open

Open

Closed

Open

Open

Open

Open

Open

 

10

Open

Open

Open

Open

Open

Closed

Open

Open

Open

 

11

Open

Open

Open

Open

Open

Open

Closed

Open

Open

 

12

Open

Open

Open

Open

Open

Open

Open

Closed

Open

 

15

Open

Open

Open

Open

Open

Open

Open

Open

Closed

 

Disabled

Open

Open

Open

Open

Open

Open

Open

Open

Open

SERIAL PORT 2 ACTIVATION

Chip

Socket

16550

U7

1489

U9

1488

U12

Note: To activate serial port 2 upgrade chips must be installed.