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IOAT55

BOCA RESEARCH, INC.

IOAT55

Card Type

Multi I/O card

Chipset/Controller

16C550

I/O Options

Parallel port, serial ports (2)

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Serial port 2

CN3

Parallel port

CN2

 

 

SERIAL PORT CONFIGURATION

Port 1 (CN1)

J5

Port 2 (CN3)

J5

COM1

Pins 13 & 14 closed

COM2

Pins 2 & 3 closed

 

COM2

Pins 14 & 15 closed

COM1

Pins 1 & 2 closed

 

COM3

Pins 16 & 17 closed

COM3

Pins 4 & 5 closed

 

COM4

Pins 17 & 18 closed

COM4

Pins 5 & 6 closed

SERIAL PORT INTERRUPT SELECT

Port 1 (CN1)

J5

Port 2 (CN3)

J5

IRQ4

Pins 22 & 23 closed

IRQ3

Pins 11 & 12 closed

 

IRQ3

Pins 23 & 24 closed

IRQ4

Pins 10 & 11 closed

 

IRQ5

Pins 20 & 21 closed

IRQ5

Pins 8 & 9 closed

 

IRQ7

Pins 19 & 20 closed

IRQ7

Pins 7 & 8 closed

PARALLEL PORT CONFIGURATION

LPT

J4

1

Pins 1 & 2 closed

 

2

Pins 2 & 3 closed

PARALLEL PORT INTERRUPT SELECT

IRQ

J4

IRQ7

Pins 4 & 5 closed

 

IRQ5

Pins 5 & 6 closed