‘Device
Driver’ is a small program that allows the operating system to communicate
with a hardware device. Most compact disc drives are ‘Windows’
compliant and the necessary drivers are installed upon detection of the
compact disc drive. There are several utilities that cache directory information
and the most recently accessed blocks of data, so if the same files are
used over and over then the compact disc drive will seem to access data
much faster. But it will be slow when the information is accessed for the
first time. For ‘DOS’ based systems, the ‘Microsoft Compact
Disc Extension’ (MSCDEX) driver defines the configuration parameters
to access the compact disc drive in the ‘DOS’ mode; the driver
under ‘Windows 95’ is ‘CDFS.VXD’ and ‘CDFS.SYS’
under ‘Windows NT 4’ version. Popular SCSI adapter drivers
are, in all probability, installed along with ‘Windows’.
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