Error Messages
POST Message
Description
1856
A Plug and Play adapter has requested a DMA address that is
not available.
Action:
1. Make sure that the settings for all ISA legacy
adapters are correct in the configuration programs
program. If the DMA address settings are not
correct, change and save the settings. Setting the
resources used by ISA legacy adapters to Not
available
enables the Plug and Play function to
configure around the legacy adapters.
For background information on PCI, ISA, Plug and
Play, and legacy (non-Plug and Play) adapters,
refer to the User's Reference. For information about
required DMA resource settings for ISA legacy
adapters, refer to the documentation that comes
with these adapters. For instructions on using the
configuration programs program, see “Starting the
Configuration/Setup Utility Program” on page 19.
2. Make sure that switches on all ISA legacy adapters
are set correctly. For information about switch
settings, refer to the documentation that comes
with the ISA legacy adapters.
3. If all DMA addresses are being used by ISA legacy
adapters, you might need to remove an ISA legacy
adapter to make a DMA address available to the
Plug and Play adapter that you want to install. For
instructions on removing adapters, see “Removing
Adapters” on page 61.
If you remove an ISA legacy adapter, set the DMA
address used by the removed adapter to Available
before installing another adapter.
4. If you have other PCI or Plug and Play adapters
installed, you might need to remove one of these
adapters to make a DMA address available to the
Plug and Play adapter that you want to install.
If a problem still exists, have the system serviced.
Chapter 4. Solving Problems
157