Multi-Tech Systems ISI551PC - Manual (Page 11)

2-2
use the base I/O address of 380h, addresses 380h-
387h must be unused.)
To select an unused I/O address and an IRQ value,
it may be necessary to find out which values are
already in use. To determine your system's current
settings, refer to Appendix A. The ISI551PC is
shipped with the IRQ set to level 3 and the base I/O
address at 2F8 hex. If you are certain that these
settings are not already in use, continue with the
hardware configuration and installation.
Note: If you choose IRQ 3 or 4, you may have to
remove the serial I/Odevice from your
configuration files. The ISI551PC cards do not
allow you to select IRQ 6 because it is almost
universally used for the floppy drive of a
computer. Also, most computers will not be
able to assign IRQ 2 to the ISI because IRQ 2 is
used for slave control.