IBM RT PC, Options Installation

Page: 41 / 254

Section 1. Getting Started 1-19
Adapter Conflicts
The adapters you choose may conflict in memory address range,
interrupt level or DMA channel.
Conflicting Memory Addresses
When adapters conflict due to identical or overlapping memory
addresses, first try to resolve the conflict by changing address
jumper modules on the adapters. If this action does not resolve the
conflict, ensure that applicable software enables only one adapter
at a time for memory address operations. If you are still unable to
resolve the conflict, consult your place of purchase.
Conflicting Interrupt Levels
The method of resolving interrupt level conflicts depends on
whether the interrupt level is required or optional. A required
level cannot be reset, but an optional level can be selected either
by changing jumper module positions on the adapter or through
applicable software.
Required and optional interrupt levels may be shareable or
nonshareable. A shareable level can be used by more than
one adapter on the same level (but not at the same time). A
nonshareable level can not be used by any other adapter at
any time.
Refer to the Interrupt and DMA Usage Chart on pages 1-21 and
1-22 to plan your system configuration.