So first to space S.P.C.A. configuration space, which is compulsory for the PCR device, so see, a
configuration space is nothing but a set of distance.
So size of this configuration space is 256 bytes out of this, 256 bytes.
It is divided into two parts.
The first sixty four bytes is standardised by the specification and the next one, Mendieta bytes are
very specific.
So out of these first six people bites plus two, four bites are used for linearity, and so expec has
defined the first four bites for dividing product at 16.
So when the right identifies the manufacturer of the device, which is allocated by the PCA sync, which
is used to ensure each and every device is unique, and then device that is set by the vendor which
identifies a particular device of the vendor.
So we have like USB has availability and productivity.
In case of PCI we have when the radion device that is assigned by the barczyk and device it is assigned
whether the particular manufacturer.
So this is the.
Standard configuration space, which is defined by the PC spec against the first four bytes assigned
for the variable device.
And then we have different things, but is one of the important intraplate which is useful and based
at a distance.