Acer CD656 firwmare 1.56 Publisher's description
from BenQ Corporate
Acer CD656 firwmare 1.56
The Acer 656A is a 56X maximum speed, 5.25" internal CD-ROM drive. It employs the advanced CAV (Constant Angular Velocity) technology that maintains consistent CD-ROM disk rotation speed and reads data at various transfer rates. This feature ensures less stressing of the spindle motor and thus better reliability of the drive.
It is highly recommended to always use the most recent driver version available.
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Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.