Day 485, No user serviceable parts

A quick look inside a BBC Model B+

The indicator that it is a B+ is that the ROM sockets are at top left.

The top three sockets contain ROM chips, below that are five empty sockets.

ROM was useful in that applications could be loaded from there without occupying main memory.

ROM sockets were typically used by disk device drivers, BASIC, or other applications.

Each application would take up a ROM socket.

The left hand ROM is GTERM 3.5, a graphics terminal emulator.

The middle ROM is DFS 2.00, for managing disk drives - the latest version was/is 2.10.

The right hand ROM is currently unknown but will be revealed by further research.

The power supply bears the traditional legend "No user serviceable parts."

I'll be taking the power supply apart and servicing it later, replacing all the capacitors in all probability.

And I'll be using the standard precaution of having both feet in a bucket of water with a live mains cable between my teeth.

For official/internal use only:
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