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2 Troubleshooting Guidelines
42 82350B Installation and Configuration Guide
be configured using the setup option when the
PC is booting.
5 Upgrade your system BIOS. New computers may
have a newer BIOS available. When installing a
new system BIOS:
• Make sure the BIOS Installed O/S setting is
set correctly. This determines what software
will configure all the Plug and Play cards in
your system. Either the BIOS or the operating
system (OS) can perform the task of querying
all the cards to determine their resource
needs, picking a valid configuration for all
these cards, and telling the cards what their
actual resource settings are.
• If the Installed O/S is set to Windows NT,
NOT PnP O/S, or Other, the BIOS will per-
form this task and the system may not work
properly
• For NT 4.0, the BIOS must perform this task
as the OS does not know how to do this. For
Windows 98, either the BIOS or the O/S can
do this task, so try both. If you are running
Windows NT, set to Running Windows NT,
Not Plug and Play OS or Other.
Set 82350 Read/Write Performance Mode
The 82350 card read and write calls use one of two
modes:
• Polling. Bytes are transferred to/from the
card, one at a time.
Polling mode is advantageous for transferring
a small number of bytes because the setup
overhead is very low, but it does require CPU
involvement for each byte transferred.
• Interrupt. An entire buffer is transferred
to/from the card without CPU involvement.
Interrupt mode is advantageous for
transferring large buffers because the higher
per byte transfer rate more than compensates
for the relatively long interrupt setup
overhead.