IBM SelectaDock III, User Manual

Page: 63 / 134

Memo
The system resources you assign are:
IRQ (hardware interrupt request):
There are 16 IRQs in the system, but certain IRQs are
reserved by the system. You can assign unused IRQs
for the newly installed devices.
DMA (direct memory access channel):
There are 8 DMA channels: 0 through 7. Certain DMA
channels are reserved by the system. This resource is
typically used by such adapters as sound cards and
SCSI adapters for transferring large blocks of data.
I/O address:
The input/output (I/O) address space extends from
X
'
0000
'
to X
'
FFFF
'
. The I/O ports of the features and
adapters are mapped here.
Memory address:
This area is for BIOS ROM or the memory-mapped I/O
area of the adapters.
IRQs and memory addresses are typically the most likely sources
of conflict. For instance, if an ISA adapter card (typically the
Sound Blaster adapter) in your SelectaDock system is using DMA
channel 1, it will conflict with the audio feature in the computer
that uses DMA channels 0 and 1 when enabled.
Always try to select proper values to avoid resource conflict.
Refer to “System Resources Assignment” on page 3-9 to
resolving the resource conflict.
Chapter 3. System Configuration
3-15