Please Consult To Jumper And Switch Setting

Switch Setting
The three switch blocks and three jumpers on the PCCOM 8 port adapter must be configured correctly in accordance with the operating system you are using.

SW1 (Switch 1)
Determines the I/O address of the UARTs.

SW2 (Switch 2)
Selects which interrupt will be used in the range IRQ3 through IRQ15.

SW3 (Switch 3)
Selects the interrupt vector address and determines which port is active when an interrupt occurs.

For DB62 pin connector board:

JP1 (Jumper 1)
Select delay wait state.

JP3 (Jumper 3)
Select master or slave board.

JP4 (Jumper 4)
Daisy chain jumper for installing more than one boards which use the common IRQ.

For DB78 pin connector board:

JP1 and JP2 (Jumper 1 and Jumper 2)
Daisy chain jumper for installing more than one boards which use the common IRQ.

JP3 (Jumper 3)
Select master or slave board.

JP4 (Jumper 4)
Select delay wait state.

All addresses specified are in hexadecimal. The actual interrupt latch address is set to the interrupt vector address set by switch 3+ 2H.

Selection of Switch Setting
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 PORT ADDRESS
(UART ADDRESS)
 SWITCH 1



NOTE: The address selected must start on a multiple of 40H. Ablock of 40H contiguous I/O locations will be used starting from the selected address.

The I/O port addresses corresponding to each port are shown in the following.

PORT
 ADDRESS
1
 BASE to BASE+07
2
 BASE+08H to BASE+0FH
3
 BASE+10H to BASE+17H
4
 BASE+18H to BASE+1FH
5
 BASE+20H to BASE+27H
6
 BASE+28H to BASE+2FH
7
 BASE+30H to BASE+37H
8
 BASE+38H to BASE+3FH

INTERRUPT(IRQ)
 SWITCH2



INTERRUPT VECTORS
 SWITCH3









Jumper Settings for DB62 Pin Connector board
  1. JP1


JP1 is used to select delay wait state, the jumper setting is shown in the following.
  1. JP3


The JP3 is used to identify master or slave board. If more than one PCCOM ISA bus 8 port use the common IRQ, you must select one board as a master, and the others as slave. For more details, please see section 5.5. If each board uses different IRQ, please set the board to master.

JP3
 Board
Short
 Master
Open
 Slave

  1. JP4


The JP4 is used to connect more than one board to used the common IRQ. Please see section 5.5 for more details.
Jumper Settings for DB78 Pin Connector board
  1. JP4


JP4 is used to select delay wait state, the jumper setting is shown in the following.

Short Pin
 Selay Wait State
1
 No delay
2
 Delay 1 CPU cycle
3
 Delay 2 CPU cycle
4
 Delay 3 CPU cycle

  1. JP3


The JP3 us used to identify master or slave board. If more than one PCCOM ISA bus 8 port use the common IRQ, you must select one board as a master, and the others as slave. For more details, please see section 5.5. If each board uses different IRQ, please set the board to master.
  1. JP1 and JP2


The JP1 and JP2 are used to connect more than one board to used the common IRQ. Please see section 5.5 for more details.
Daisy Chain Interrupt
The daisy chain interrupts function provides more than one PC COM 8 port board to use the common interrupts.

The JP3 is used to identify master or slave board, and the daisy chain jumper (IN/OUT) is used to connect daisy chain.

JP3: Select master or slave


JP3 Board
Short
 Master
Open
 Slave

Suppose you used one common interrupt to serve 24 ports, it must select one board as master board that generates interrupt, and the other two boards as slave. It shows how to connect daisy chain interrupt in the following.



NOTE THAT, WHEN THE DAISY CHAIN FUNCTION IS USED, ONLY SET INTERRUPT (SWITCH 2) ON MASTER BOARD, DO NOT SET IRQ ON SLAVE BOARD.
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