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HOSTESS

COMTROL CORPORATION

HOSTESS

Card Type

Multi-user serial controller

Chipset/Controller

Texas Instruments (UART)

I/O Options

Serial ports (4 or 8)

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

100 Pin interface connector

CN1

External reset connector 1

CN4

Upgrade connector 1

CN2

External reset connector 2

CN5

Upgrade connector 2

CN3

   

I/O ADDRESS SELECTION

Address

SW1/1

SW1/2

SW1/3

SW1/4

SW1/5

SW1/6

SW1/7

100h

On

On

On

On

Off

On

On

140h

On

On

On

On

Off

On

Off

200h

On

On

On

Off

On

On

On

240h

On

On

On

Off

On

On

Off

280h

On

On

On

Off

On

Off

On

500h

On

On

Off

On

Off

On

On

540h

On

On

Off

On

Off

On

Off

580h

On

On

Off

On

Off

Off

On

600h

On

On

Off

Off

On

On

On

640h

On

On

Off

Off

On

On

Off

680h

On

On

Off

Off

On

Off

On

700h

On

On

Off

Off

Off

On

On

Note: Switch SW1/1 in on for the four port controller and Off for the eight port model.

FOUR/EIGHT PORT SELECTION

Number of Ports

JP1

SW1/1

SW2/1

4

Pins 2 & 3 closed

On

On

8

Pins 1 & 2 closed

Off

Off

SERIAL PORT INTERRUPT SELECTION (MASK ENABLE ON)

IRQ

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

2/9

On

On

Off

Off

Off

Off

Off

3

On

Off

On

Off

Off

Off

Off

4

On

Off

Off

On

Off

Off

Off

5

On

Off

Off

Off

On

Off

Off

10

On

Off

Off

Off

Off

On

Off

11

On

Off

Off

Off

Off

Off

On

SERIAL PORT INTERRUPT SELECT (MASK ENABLE OFF)

IRQ

SW2/1

SW2/2

SW2/3

SW2/4

SW2/5

SW2/6

SW2/7

2/9

Off

On

Off

Off

Off

Off

Off

3

Off

Off

On

Off

Off

Off

Off

4

Off

Off

Off

On

Off

Off

Off

5

Off

Off

Off

Off

On

Off

Off

10

Off

Off

Off

Off

Off

On

Off

11

Off

Off

Off

Off

Off

Off

On

MISCELLANEOUS TECHNICAL NOTE

Serial ports are located on an interface box which connects to Hostess via the 100-pin interface connector.