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PC422/485

BLACK BOX CORPORATION

PC422/485

Card Type

Serial card

Chip Set

Unidentified

Maximum Onboard Memory

None

I/O Options

Serial port

Data Bus

8-bit ISA

Floppy drives supported

None

CONNECTIONS

Function

Label

25-pin serial port

J2

USER CONFIGURABLE SETTINGS

Function

Label

Position

Serial port select IRQ3 (COM2)

E1

Pins 1 & 2 closed

Serial port select IRQ4 (COM4)

E1

Pins 2 & 3 closed

Serial port driver RTS enabled

E2

Closed

Serial port driver always enabled

E2

Open

Serial port select XT-J8 slot

E3

Closed

Serial port select all other slots

E3

Open

SERIAL PORT ADDRESS SELECTION

Address

S1/1

S1/2

S1/3

S1/4

S1/5

S1/6

S1/7

S1/8

238h

On

Off

Off

Off

Off

Off

Off

Off

2B8h

Off

On

Off

Off

Off

Off

Off

Off

338h

Off

Off

On

Off

Off

Off

Off

Off

3B8h

Off

Off

Off

On

Off

Off

Off

Off

278h

Off

Off

Off

Off

On

Off

Off

Off

2F8h

Off

Off

Off

Off

Off

On

Off

Off

378h

Off

Off

Off

Off

Off

Off

On

Off

3F8h

Off

Off

Off

Off

Off

Off

Off

On