Technical data

Driver Descriptor, Continued
Name Description
Length of driver Contains the length of the device
driver in bytes. This field is used
by both the base system ROM and
the system test monitor to determine
the amount of code that needs to be
loaded into RAM.
Entry point of driver Contains the number of bytes from
the beginning of the device driver to
the INIT_DRIVER function.
Size of driver data area Contains the length in bytes of the
amount of memory that a driver
needs for its parameters and local
data.
Address of driver data
area
Contains the address of the device
driver data area that is used by the
driver to store local data.
Address of I/O segment
table
Contains the address of the I/O
segment table.
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