Multi Tech Equipment ISIHI-2S User Manual

When you install a device into your computer, the processor must have a means of
routing information to and from the device, and the device must have a means of gaining
the processor’s attention. Input/Output (I/O) addresses route information to and from the
device. Interrupt Requests (IRQs) gain the processor’s attention. The ISIHI-2S card
requires eight I/O addresses and one IRQ value that are not used by any other device in
your system. When selecting a unique base I/O address, be sure the next address also
is unused. To determine your system’s current setting, refer to Appendix A and B.

If you are certain these settings are not already in use, continue with the hardware
installation. Each card is shipped with the IRQ set at 10 and the base I/O address set at
210 hex. Check your system’ssettings to see if these values can be used. If the defaults
are already in use, select a unique IRQ and I/O address and record them below for future
reference.

I/O address _____________ IRQ ___________________

ISIHI-2S

Base I/O Address

IRQ

Initial 8 port board

210h

10

First 8 port upgrade

220h

11

Second 8 port upgrade

230h

12

Third 8 port upgrade

240h

15