13
4. Before Connecting the PRO16SA
COM PORTS ADDRESS IRQ (interrupt)
COM 1
3F8H
4
COM 2
2F8H
3
COM 3
3E8H
4
COM 3
3E8H
5
COM 4
2E8H
3
COM 4
2E8H
5
• You will notice that both COM3 and COM4 can be set to an
IRQ (interrupt) of 5
• Your computer can share an IRQ (interrupt) between two
COM ports, as long as both COM ports are not accessed at
the same time
• Unlike an IRQ (interrupt), an address cannot be shared
between two hardware devices
For example:
• If you are sharing an IRQ with the mouse on COM3 and your
modem on COM4, when you run software to use the modem,
the mouse will freeze or become erratic and the machine will
halt and lock up.
• This is because there are two hardware devices which are
both trying to use the same IRQ (interrupt) at the same time.
• It is not recommended to share an IRQ (interrupt) in your
computer, and if you are experiencing problems similar to
this then contact your dealer.
Содержание PRO/6
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