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AVOIDING SERIAL PORT CONFLICTS
If PenPartner is not communicating properly with your computer, there may be a serial port conflict. In this
case, check your serial port configuration; you should never have the WACOM tablet and another device
share the same IRQ line. This can cause unpredictable results.
Each serial device attached to your computer needs its own unique communication port (Com port)
address and Interrupt Request (IRQ) line. If two serial devices end up sharing Com port addresses and/or
IRQs, it will result in the devices not being detected, or may cause the system to “hang.”
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Most computers come with two external serial ports (Com 1 and Com 2). If you have an external serial
port connector assigned to Com 2 and your internal modem is also using Com 2, you will have a Com
port conflict.
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If you have a modem on Com 3 with an IRQ of 4 and a tablet on Com 1 with an IRQ of 4, you will have
an IRQ conflict.
We do not recommend using Com 4, if possible. Video cards with the “S3” chipset use the same memory
address as Com 4 and may cause conflict.
