8-Bit Software

The BBC and Master Computer Public Domain Library

See Their Insides
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Click on the photo of the machine to see more about it (motherboards and technical info)
Atom
BBC B
BBC B+
Electron
Master 128
Master Compact
Keyboard, switches and Keytops all Machines
Function Key Strips
Inside a Cub Monitor
Circuit Diagrams all Machines

 Here are a few photographs of the insides of machines.

Acorn 8 Bit Machines  AtomBBC B+BBCElectronMaster 128Master Compact
 Clicking on the image above will take the lid off each computer. Revealing a photo of the motherboard. Clicking on the revealed motherboard will reveal a better picture plus a bit of technical info, the images are mapped so that you can click on individual components to then read information about that component. You can also view a larger scan.
Keyswitches and Keytops
Repairing a keyboard. This article contains pictures of all keys and keyboards
Inside a Cub Monitor


Atom

BBC B

BBC B

Click the photo for a better image plus technical information. OR click here to view a large scan.

BBC BBBC With Econet

Various BBC B Motherboards

Click on the thumbnails





Parts of a US Issue 1 BBC

Issue 2 BBC
Issue 3 BBC B
Issue 4 BBC B

Issue 7 BBC B

 


BBC B+

BBC B+
Click the photo for a better image and technical info. OR click here to view a large photo
 

Electron

Electron
Click the photo for a better image and technical info. OR click here to view the a large scan. Motherboard. PSU
 

Master 128

Master 128
Click the photo for a better image plus technical information.  OR click here to view a large scan.
Thanks to John Kortink for this high quality photo of a Master Motherboard
 

Master Compact

Master Compact
Click the photo for a better image and technical info. OR click here to view a large scan.
 

Keyboards, Keyswitches and Keytops

Click on the Thumbnails

Atom

The Atom keyboard
Side View
Keytop and keyswitch

 

Electron

Electron Keyboard
Electron Keyboard edge
Electron Keyswitch and keytop. These are the same as the Master 128 except the colour of the keytop is different
http://deskthority.net/wiki/Futaba_low-profile_linear

BBC B and B+

Type 1, 2, 3 and 4 together
Type 1 http://deskthority.net/wiki/Futaba_simplified_linear
Type 2 http://deskthority.net/wiki/SMK_vintage_linear
Type 3 http://deskthority.net/wiki/BBC_Micro_Type_3
Type 4 http://deskthority.net/wiki/SMK_vintage_linear
Detail of type 1
Detail of type 2
Detail of type 3
Detail of type 4
This is the most common BBC keyswitch and keytop that I have found. I call it type 1. I had tons of these as spares. (Futaba)
This is another, not so good BBC keyswitch, they seem more prone to failure, I call these type 2. (Cheap SMK)

This is the type 3 keyswitch (PED. Probably. This information not confirmed.)
Type 4 keyswitch (SMK). Thanks to Daniel Beardsmore for rooting out make information for these keyswitches. The link leads to his pages about keyboards and switches


Type 3 keyboard

Master 128

Master 128 Keyboard
Master 128 Keyboard. The new 'Cherry' type
The membrane for a cherry keyboard
This is the original Master 128 Keyswitch and keytop. In fact the keytop is the same as the BBC type 1 keytop

Here is the new Master keyboard. The keys are clipped to the board into a plastic layer containing the tracks. I have seen similar style keyswitches for the BBC:
http://deskthority.net/wiki/Cherry_MY
A comparison between the original and new Master keytops

Master Compact

Keyboard in pieces, top view
Keyboard in pieces, view of underside
Master Compact Keyswitch and top


Function Key Strips

Top strip is the BBC B up to and including issue 4. It has a picture of an owl and the words BBC MICROCOMPUTER on it. The BBC B after issue 4 and 1983 had the function key strip with a picture of an owl and the words BRITISH BROADCASTING CORPORATION MICROCOMPUTER SYSTEM. The reason for this was that the trademark BBC was already taken in America. Click on the thumbnail.

The lower strip is a BBC B+ function key strip.

The Master 128 function key strip is plain.Click on the thumbnail:


Circuit Diagrams

These are scans of circuit diagrams of various Acorn 8 bit machines. If you have any not listed here, please let me know!

Inside a Cub Monitor

I took these pictures whilst trying to ascertain what had hapenned to someones monitor that I had posted to them.

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