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5634BIF User’s Manual
44
Write the port addresses for each COM Port down. Regardless of what MSD says,
"03F8" is COM1, "02F8" is COM2, "03E8" is COM3, and "02E8" is COM4. If it has
"02E8" under COM3, don't worry about it. It just means you skipped a COM Port, this is
very common. You only have to go by the port addresses.
OPTION 1
If you only have "03F8" in the COM Port screen and do not have any sound, network,
scanner card, bus mouse, or other device using IRQ3, set your modem's switches or
jumpers to COM2 IRQ3 according to the user's manual that came with your modem (both
COM and IRQ must be set). If you only have "02F8" for COM port, set your modem
to COM1 IRQ4, again following the directions of your Modem User's manual.
OPTION 2
If you have both "03F8" and "02F8" and do not have any sound, network, scanner card,
bus mouse, or other device using IRQ5, set your modem to COM3 IRQ5.
OPTION 3
If you have "03F8" and also have "02E8" and you do not have any sound, network,
scanner card, bus mouse, or other devices using IRQ5, set your modem to COM2 IRQ5.
OPTION 4
If you have "03F8" and also have "02E8" and you do have another device using IRQ5,
please consult your "Multi I/O Card User's Manual" and have COM4 "02E8" IRQ3
disabled. This "Multi I/O Card User's Manual" ought to come with your computer system.
Check with your computer dealer if you can't find one in the package. Set your modem
to COM2 IRQ3 after COM4 IRQ3 is disabled on the I/O card.
OPTION 5
If you have both "03F8" and "02F8" and you do have another device using IRQ5 while you
don't have any external device connected to COM2 "02F8", have COM2 "02F8" IRQ3 on
your I/O card disabled. Set your modem to COM2 IRQ3 after COM2 IRQ3 has been
disabled on your I/O card.
OPTION 6
(depends on your system's multi-I/O card)
If you have both "03F8" and "02F8" and do have another device using IRQ5 while there is
an external device connected to COM2 "02F8" and a serial mouse is connected to COM1
"03F8," you can try to put your modem on COM4 IRQ3. However, this is not always
guaranteed to work. It is to our experience that whether or not this kind of setting works
or not depends a lot on the multi-I/O card itself. Sometimes the I/O card does not like to
share IRQ (IRQ3 in this case) with another device. Sometimes this setting will work for
a while and suddenly stopped working. Sometimes it will work flawlessly. The PC
Bus architecture was not designed to share IRQ's.
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