Please Consult To Jumper And Switch Setting

Compatible Mode
The first two serial ports are referred to as COM1: and COM2: which are standard ports for IBM PCs. If the PCCOM 4 port adapter is configured to emulate two standard ports by setting two of the four ports to be compatible with COM1: and COM2:. This is called compatible mode.

Enhanced Mode
The PCCOM 4 port adapter may be configured to coexist with the two standard ports, adding four ports for a total of six. This is called enhanced mode. Under the enhanced mode, a maximum of two adapters can be added to the system, which provides eight additional ports for a total of ten.
Add two PCCOM 4 Port  Adapters
  1. Compatible with COM1: and COM2:

 Port
First
Adapter
 COM1:
COM2:
3
4
Second
Adapter
 5
6
7
8
  1. Coexist with COM1: and COM2:

 Port
Standard
Port
 COM1:
COM2:
First
Adapter
 1
2
3
4
Second
Adapter
 5
6
7
8

Configuration for Dip Switch and Jumper
It is important to refer to the user manual supplied with your operating system to determine the correct configuration. Although we provide installation advice for various operating systems, it is not possible to cover all systems in this user guide. Please contact you supplier if you have any difficulties with configuration.

important:CARE MUST BE TAKEN IN SELECTING THE CONFIGURATION OF JUMPERS AND SWITCH TO ENSURE YOU DO NOT DUPLICATE SETTINGS OF OTHER EQUIPMENT ALREADY INSTALLED IN YOUR COMPUTER. DUPLICATION OF SETTINGS WILL RESULT IN A MALFUNCTION OF ONE OR BOTH DEVICES.

Please refer to the following settings for each switch and jumper block. If you are installing more than one board, do not duplicate jumper settings for any parameter.

  1. I/O Address Selection
SWITCH 7,8: Select Compatible Mode or Enhanced Mode.
 

SW7    SW8
 MODE
ON      ON
 Compatible Mode
(high address)
ON     OFF
 Compatible Mode
(low address)
OFF     ON
 *Enhanced Mode
(high address)
OFF     OFF
 Enhanced Mode
(low address)

* Default setting is in Enhanced mode (high address).

* The mapping of I/O addresses to each channel are shown in below:
SW7    SW8
 Channel 1
 Channel 2
 Channel 3
 Channel 4
 Vector
ON       ON
 3F8-3FF
 2F8-2FF
 2B0-2B7
 2B8-2BF
 2BF
ON      OFF
 3F8-3FF
 2F8-2FF
 1B0-1B7
 1B8-1BF
 1BF
OFF      ON
 2A0-2A7
 2A8-2AF
 2B0-2B7
 2B8-2BF
 2BF
OFF    OFF
 1A0-1A7
 1A8-1AF
 1B0-1B7
 1B8-1BF
 1BF

  1. Interrupt Selection
SWITCH 1, 2, 3, 4, 5, 6: Select interrupt line
Switch On
 1
 2
 3
 4
 5
 6
Interrupt
Enable
 IRQ2 IRQ3 IRQ4 IRQ5 IRQ6 IRQ7

In compatible mode, COM1: and COM2: automatically generate interrupts on IRQ4 and IRQ3 respectively.
  1. Select Wait State
JP1: Select Wait State
1
3
.
.		 .
.
2
4


SPEED
Short 1, 3
 Lower Than 16MHZ
Short 2, 4
 Above 16MHZ
  1. Mode Selection
JP2: Mode selection
.          .
.          .

Short
 Compatible Mode
Open
 Enhanced Mode

* To short the JP2, it enables 3F8 (IRQ4) and (IRQ3) of this board. So that do not short the jumper when your card is in enhanced mode, otherwise the system may generate both IRQ4, IRQ3 and IRQ that you set by switch. Only short it when compatible mode is set.
  1. Select software interrupt or hardware interrupt
JP3: Mode Selection
    1      2      3
. . .


MODE
Short 1, 2
 Normal Mode
Short 3, 4
 PC_MOS/386 Mode

* To short 1, 2 means you must enable global interrupt (see chapter 7) by software. These setting is only used under Unix environment.

To short 2, 3 means the hardware set global interrupt automatically (default). this setting is used under Non-Unix environment like DOS and Windows.
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