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 RS422
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
RS422
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 |
- Compatible with COM1: and COM2:
|
Port
|
First
Adapter
|
COM1:
COM2:
3
4
|
Second
Adapter
|
5
6
7
8
|
|
- 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.
|
|
|
- I/O Address Selection
SWITCH
1, 2: Select Compatible Mode or Enhanced Mode.
SW1
SW2
|
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:
SW1
SW2
|
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
|
|
- Interrupt Selection
SWITCH 3, 4, 5: Select interrupt line
SW3
|
SW4 |
SW5 |
MODE
|
OFF
|
OFF
|
ON
|
Global
interrupt
|
ON
|
ON
|
OFF
|
Separate
interrupt
|
Global interrupt means all 4 ports use
common IRQ and separate interrupt means each port uses individual
interrupt. Default setting is in global interrupt mode and almost
applications are used in global interrupt mode.
|
- Select Wait State
JP2: Select Wait State
|
SPEED
|
Short
1, 3
|
Lower Than 16MHZ
|
Short
2, 4
|
Above 16MHZ
|
|
- Interrupt
JP4 is used to select global interrupt.
Short right side of JP4 means to select interrupt line of all channels.
JP4
|
1
|
. .
. |
IRQ2
|
2
|
. .
. |
IRQ3 |
3
|
. .
. |
IRQ4 |
4
|
.
|
IRQ5 |
5
|
. .
. |
IRQ6 |
6
|
. .
. |
IRQ7 |
In standard PC system, COM1 and COM2
generate interrupts on IRQ4 and IRQ3 respectively. The default setting
is IRQ5 (enhanced mode / high address). We recommend you to set IRQ5
for first adapter and IRQ7 for second adapter. However, you may set any
interrupt line according to your requirements.
Suppose you set SW3, SW4, SW5 to separate
interrupt mode, then JP3 and JP4 are used to set interrupt for each
port. Short right side of JP3 means select interrupt for port2, short
left side of JP3 means select interrupt for port 1. Short right side of
JP4 means select interrupt for port 4, and short left side of JP4 means
select interrupt for port3.
JP3
|
|
JP4
|
1
|
. .
. |
IRQ2
|
|
1
|
. .
. |
IRQ2 |
2
|
. .
. |
IRQ3 |
|
2
|
. .
. |
IRQ3 |
3
|
. .
. |
IRQ4 |
|
3
|
. .
. |
IRQ4 |
4
|
. .
. |
IRQ5 |
|
4
|
. .
. |
IRQ5 |
5
|
. .
. |
IRQ6 |
|
5
|
. .
. |
IRQ6 |
6
|
. .
. |
IRQ7 |
|
6
|
. .
. |
IRQ7 |
If you set separate interrupt mode, then
for each channel, you may select each interrupt separately. Please note
that if compatible mode is selected, the COM1 and COM2 generate
interrupt on IRQ4 and IRQ3 respectively.
|
- J2 jumper
Always short pin 1 and pin 2.
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NEXT
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