BeebMaster - BBC Model B Disc Upgrade

Fitting a
disc upgrade

Remove the lid and we have our first glimpse inside the Beeb. There's everything in here that Charles Babbage could have dreamed of and more!

Before we go any further, we must identify the Issue Number of the mother board. This is part of the copyright message which appears about half-way up the printed circuit board, roughly in line with the keyboard ribbon cable.