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Read Asynchronous Notification statuses only if Port Multiplier or ATAPI

Description

Read Asynchronous Notification statuses only if Port Multiplier or ATAPI
device are connected. ATA disks are not using ANs, while the extra register
read operation is quite expensive.

Details

Provenance
mavAuthored on Mar 25 2013, 1:58 PM
Parents
rGcd08290b48fe: o Typo: IEE -> IEEE.
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