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TWINPORT

ARNET CORPORATION

TWINPORT

Card Type

Serial controller

Chipset/Controller

Startech

I/O Options

Serial ports (2)

Maximum DRAM

N/A

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 2

CN1

Serial port 1

CN2

SERIAL PORT CONFIGURATION

Port 1 (CN2)

Port 2 (CN1)

S1

S2

COM1

COM2

1, 2, 3, 5, & 6 on

1 & 2 On

COM1

Disabled

1, 2, 3, & 5 on

1 On

Disabled

COM2

1, 2, 3, & 6 on

2 On

Disabled

Disabled

All Off

N/A

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

I/O ADDRESS SELECT

Port 1 (CN2)

Port 2 (CN1)

Option

S1/1

S1/2

S1/3

S1/7

S1/8

100h

108h

140h

Off

Off

Off

Off

Off

180h

188h

1C0h

Off

Off

On

Off

Off

200h

208h

240h

Off

On

Off

Off

Off

200h

208h

2D0h

Off

On

On

Off

Off

280h

288h

2C0h

On

Off

Off

Off

Off

280h

288h

300h

On

Off

On

Off

Off

300h

308h

340h

On

On

Off

Off

Off

3F8h

2F8h

340h

On

On

On

Off

Off

OPTION I/O SPACE CONFIGURATION

Setting

S1/4

Enabled

On

Disabled

Off

I/O ADDRESS SELECT

Port 1 (CN2)

Port 2 (CN1)

S1/1

S1/2

S1/3

S1/4

S1/5

S1/6

S1/7

IRQ4

IRQ3

On

On

Off

Off

Off

Off

Off

IRQ2

IRQ2

Off

Off

On

Off

Off

Off

Off

IRQ3

IRQ3

Off

Off

Off

On

Off

Off

Off

IRQ4

IRQ4

Off

Off

Off

Off

On

Off

Off

IRQ5

IRQ5

Off

Off

Off

Off

Off

On

Off

IRQ7

IRQ7

Off

Off

Off

Off

Off

Off

On

FORMULA IV OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

280h

N/A

IRQ2

1, 5 & 6 on

3 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

MBOS/5, BOS/LAN OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

100h

N/A

IRQ2

5 & 6 on

3 on

 

200h

N/A

IRQ2

2, 5 & 6 on

3 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

MUC-DOS OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

100h

140h

IRQ7

4, 5 & 6 on

7 on

 

200h

240h

IRQ7

2, 4, 5 & 6 on

7 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

MUMPS/CCSM MUMPS OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

280h

2C0h

IRQ3

1, 4, 5 & 6 on

4 on

 

200h

2D0h

IRQ3

2, 3, 4, 5 & 6 on

4 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

PICK OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

280h

2C0h

IRQ4

1, 4, 5 and 6 on

5 on

180h

1C0h

IRQ3

3, 4, 5 and 6 on

4 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

QNX OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

280h

N/A

IRQ2

1, 5 & 6 on

3 on

280h

N/A

IRQ3

1, 5 & 6 on

4 on

280h

N/A

IRQ4

1, 5 & 6 on

5 on

280h

N/A

IRQ5

1, 5 & 6 on

6 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

THEOS OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

System Type

S1

S2

280h

2C0h

IRQ5

AT

1, 4, 5 & 6 on

6 on

280h

2C0h

IRQ4

XT

1, 4, 5 & 6 on

5 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

VENIX/86 OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

280h

N/A

IRQ3

1, 5 & 6 on

4 on

280h

N/A

IRQ4

1, 5 & 6 on

5 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

XENIX SYSTEM V OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

Port

S1

S2

100h

140h

IRQ4

COM1

4, 5, & 6 on

5 on

 

280h

2C0h

IRQ4

COM1

1, 4, 5, & 6 on

5 on

180h

1C0h

IRQ3

COM2

3, 4, 5, & 6 on

4 on

 

300h

340h

IRQ3

COM2

1, 2, 4, 5, & 6 on

4 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

XMM-DOS OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

100h

140h

IRQ2

4, 5, & 6 on

3 on

 

180h

1C0h

IRQ7

3, 4, 5, & 6 on

7 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.

PC-MOS/386 OPERATING SYSTEM SETTINGS

UART Address

Option I/O Address

IRQ

S1

S2

280h

N/A

IRQ2

1, 5 & 6 on

3 on

 

100h

N/A

IRQ2

5 & 6 on

3 on

Note:All switch keys other than those designated as on for a particular configuration should be put in the Off position.