Specifications

Chapter 2 - Installation

When selecting a unique base I/O address, be sure that the next

address is also unused. To determine your ISI's current settings, see

Appendix A of User Guide.

If you are certain that these settings are not already in use, continue

with the hardware configuration and installation. You can install up to

four ISI4608 cards into your system. Each card is shipped with its

IRQ set at level 10 and a base I/O address of 210 hex. Check your

system’s device settings to see if these values can be used. If the

defaults are already in use, select a unique IRQ and I/O address

combination for each card you install, and record those values for

use in the hardware and software installation sections that follow.

Table 2-1

Recommended Base I/O Address and IRQ Values

ISI4608 Card 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

Note: If you choose IRQ 3 or 4, you may have to disable a COM device

from your BIOS setup. Also, most 386 or higher compatible

computers will not be able to assign IRQ2 to the ISI card because

IRQ2 is reserved for slave interrupt control.