The BBC and Master Computer Public Domain Library

Photos of BBC Boards

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Main Pictures Page
Boxes Various original wrappings
Cartridge and ROM
Computers BBCs Masters and Electrons
Co-processors and other plug in boxes
Drives, fileservers and tape decks
Eprom Programmers
Help please! What are these? Do you know?
Human interface Joystick, graphpad, mouse etc
Image input Scanners, cameras, digitisers etc
Monitor and related items
Master 512 Board with 1 meg Upgrade

Master 512. 80186 board. Thanks to John Kortink for these photos. As with most of John's photos, I have reduced the filesizes dramatically. I have preserverd the high quality originals which are available on CDR-02 the 8BS photos CD

Master 512 board with 1 meg upgrade. Thanks to the eBay seller for these photos

Master 128 and 65C102 co processor. Thanks to Ken Hewson for these photos

65C102 Co Processor. Thanks to John Kortink for these photos

65C02 co processor. Thanks to John Kortink for these photos
6502 Internal Co-Processor for the Master 128. Thanks to Lee at Vintage Computers for this one
Master 512 board fitted. Thanks to
Master 512 Board in an external box. Thanks to Rik Steenwinkel
ATPL board fitted in a BBC B. This one has 16K SWR fitted too
ATPL Board. Thanks to Ken Scott for the photo
B+ ATPL Board. This is an ATPL Plus board for a BBC B+.
BBC B+ 64k Sideways ram daughter board for a BBC B+

BBC B+ and 64K daughter board. Thanks to Ken Hewson for these photos

BBC B with solidisc SWR board fitted. Thanks to Ken Hewson for these photos

Rom Carrier. This allows you to fit two roms into one slot

Watford RAMROM board. Thanks to John Kortink for these photos and the following info: The ROM that I got with it (yonks ago) says 'Watford Electronics 32K RAM Board 2.00" but there are no markings on the board suggesting it's actually a WE board. Perhaps it's a homebrewn copy. ;-) I did get it to work back then, with the ROM mentioned, but I need to bend my power connectors to fit it now, which I won't do for the time being. I suppose it still works (you lift the 6502 out, plug the board in the 6502 socket, then refit the 6502 on the board).
UPDATE from John:
I've now found out that it's functionally the same as the Watford 32K RAM Card, i.e. this one. The manual for that one is on the BBC Documentation Project site, and checks out : my board lists and responds to the exact same commands (well, in some way, 'Watford Electronics 32K RAM Board 2.00' inside the ROM could have tipped one off here ;-) ... but now it's for sure). The difference is this : my board does not connect to the 6502 socket by a flatcable like the standard board, it simply plugs into the 6502 socket. Secondly, it uses static instead of dynamic RAM. What I have here is probably a 'bootleg' of some sort. I doubt it's a prototype, because the chip dates prove it was built *after* mid-1985, and the official board is from 1984 if I'm correct.

Torch Z80

Acorn Z80. Thanks to Keith Howell for these photos
The Master Replay System. Notice PB04, the BBC B OS. The Master OS is to the right of the Replay chip. The board plugs into the MOS socket. The adaptor plugs over IC 15. The red button is pressed to freeze the machine. The switch can then be flipped to turn your Master into a BBC B! Or, you can then save the whole of memory to a specially formatted disc to reload later. Ideal for playing games where you might need to have several attempts at something. You can also put cheats into games with this unit.
Master Replay fitted. Thanks to
Solidisk DFDC and 256K ROM board. Fitted into a BBC B. The DFDC allows you to have both an 8271 and 1770 disc controller in the same machine! You can also just see one of the speech chips and an extra audio out DIN plug fitted where the Econet plug goes. DFDC flying lead connects to leg one of IC 86. This info thanks to Paras Sidapara: . Solidisk DFDC picture you have; that board next to it is a SideAid 256 - apart from a few extra ROM sockets, you also get a massive 256k RAM and support for shadow (explicit or B+ emulation); those things generate a heck of a lot of heat (the load has been known to burn out the PSU of the beeb!)

Master Econet Boards. On the right the newer version. The right-hand one has collision detect circuitry built in. The earlier board shown on the left was supposed to have collision detect performed in software, but this never worked properly and Acorn introduced the improved module. Thanks to Mike Tomlinson for that info. The third (showing the ROM) appeared on Ebay and I dan't know anything about it. Help would be appreciated

Master Econet Board. Thanks to John Kortink for these photos

Prototype Econet Board. Thanks to Ian Wolstenholme for this

Thanks to Philip Mulrane for these two pictures. Info from Philip: The first shows the Econet board fitted to the Atom,. The ribbon cable at the top of the Econet board on the LHS is my addition, the PL8 on my board was in the wrong position to allow fitting of the board without this modification. There must have been different issues of the Atom board. The second is a screen shot of a logged in Atom, after executing a *info command.
The Beebug Master Modem. Fits internally to the Master 128.

Thanks to Paul Aslin for these photographs. Info from Paul:
Barson computers - Sydney Australia, offical importer for Acorn. Thought nothing of making their own hardware.
Barson SASI 1MHz Adapter

Thanks to Paul Aslin for these photographs. Info from Paul:
BMS (BBC Micro Supplies) - Adelaide Australia, the local Dealer. Thought nothing of making their own hardware.
The BMS econet board is hand soldered and is believed to be a pre production. Some components were different on the other boards I saw.
Thanks to Paul Aslin for this Acorn Econet
GCC RAM/ROM. Thanks to Richard hall for this scan of info about it
BBC B Two Meg 128 board. Note the RAM bank switch to the left and the three flying leads connected to the BBC motherboard

Top an Aries B12 board 
Lower, the board fitted into a BBC B
Aries B32 Board
Aries B20 and B12 Boards. Thanks to Ken Hewson for this photo
1 Megabyte upgrade board for the Master 512 board. A very rare item indeed.

Looks like a home made 16K SWR for a BBC. Wiring was Red to pin1 of IC1. Brown to pin 17 of IC69. Black to pin 1 of IC72 and Green to pin 20 of IC88. The Rom was in IC88
Watford 12 ROM board

Acorn User Sideways Ram. Neat little bit of kit. Only one wire to solder/clip to another chip leg

Master Overlay out and fitted
BBC Replay. Freezes the computer when the button is pressed. Save the whole of memory to disc. Can be loaded in at a later date. Great when playing games at difficult points. Great for tape to disc transfer.
Genlock card for Master 128

Home made 1770/1772 FDC Card for BBC Model B. It was designed and made by Kendall Julian from The Friendly Computer Company in Napier, New Zealand. Thanks to Michael Foot for these photos

Solidisc 1770 DFS for the BBC. Thanks to Rob iveson for the scans
Acorn 1770 Disc interface. Thanks to Ken Hewson for this
Cumana Disc Controller. Thanks to Ken Hewson for this photo
Opus DDOS Board. Thanks to Ken Hewson for the photo

Watford Electronics 1770 Disc Interface. Thanks to John Kortink for the photos
Cumana DFS for the Electron

Electron Econet board Not fitted and fitted.
Thanks to Philip Mulrane for the photos and this info:
When fitted the Econet connector is at the lower right of the rear panel of the Plus-1, making it obligitory to cut a hole in the Plus-1´s case. The unit was built by a company called Barson, based AFAIK in Australia

BBC econet board. Thanks to the eBay seller for this photo and info: This machine is fitted with Acorn Econet using a development never released. Anyone who knows Econet will know that the BBC micro had problems compaired to its new brothers the Archimedes. This BBC fixes all those problems by allow you to use any BBC Master/Acorn Archimedes Econet module inside the BBC. If the net fails, unplug the module and try another, its as simple as that! No soldered components, DIP switch on riser board sets the station address. More reliable access with the new modules and this machine includes an Acorn NFS rom. Also if you want to play disk games sometimes you can pull out the module adapter completely and use the machine as if econet was not fitted! A brand new A4000 series surface mount component version Acorn econet module which is far more advanced then what was fitted by the factory for schools. The module adapter is fitted into sockets on the BBC computers main board
A BBC board of some description. Any ideas please? Thanks to

Thanks to P.Hardwick for the photos of a BBC B with Integra B Board fitted
Watford 32K RAM. Thanks to Daniel Kendell for this

Watford 32K RAM. Thanks to Michael Foot for these photos

Solidisk 32K extension and 128 upgrade board, separate and fitted.
Master RAM Board. Thanks to Gordon Dyer for this photo

Data Gem. Thanks to Rik Steenwinkel

Watford Electronics ROM/RAM. Note the Data Gem fitted too. Thanks to Rik Steenwinkel
Master Rom. Thanks to Rik Steenwinkel

Thanks to Jeremy Shepherd for the photos of the Opus Disc controller board

Thanks to Jeremy Shepherd for these ATPL photos

Solidisk 256K RAM Board

Peartree N4200 RAM Board. Thanks to Ian Wolstenholme for this info, it is some sort of Master MOS overlay/replacement board. I think it is a board to swap out 3 banks of ROMs in the MOS and replace them with your own ROMs in the available slots. You plug the connector into the MOS ROM slot on the Master and put the MOS ROM in the socket above the connector. Then you have 3 spare ROM sockets for you to put in some useful ROMs and get rid of things like View, Viewsheet & Terminal. The probe clip attaches to a pin of one of the ICs near the sideways ROMs presumably to make all this able to happen.

Thanks to Jon Irvine. A battery backed sideways ram to allow roms to be retained after switch off. Thanks to Jeff Stevens for this info

ROMEX 13. Thanks to Jon Irvine
This is unusual I think. A BBC issue 7 board. See if you can spot what I mean! The filename gives you a bit of a clue...
Mini Office II board.

Thanks to Paul Jagger for these photos. Info from Paul:
Attached are some photos of the a BBC Master Turbo AV with the associated Acorn SCSI Adapter that has to be just about as rare as an ARM1 2nd Processor. I have the complete BBC Master AV system with the Domesday player and disks. It doesn't work 100% (I can overlay the BBC Master RGB output with the LVROM players video output - but I am sure that's a set up issue).

Thanks to Angela for these photos and info:
User Port Control Board. This board can take up to four input signals (0 - 5V) and set up to four output switches on/off. The construction of the board is such that it fully isolates the BBC microcomputer from damage. The signal coupling is by light (opto-electronics). I think that each switch is capable of handling up to 1 Ampere. The board connects directly by ribbon cable to the user port 20 way connector. The magazine articles describe both the board's construction and how to program the user port and Data Direction Register

Thanks to Angela for this photo and info:
User Port Input/Output board. If you are trying to program the VIA it is very helpful to be able to see the state of the 8 data lines. This board monitors input/outputs using 8 LEDs. Inputs are made by setting up to 8 DIL switches on the board. The board connects directly by ribbon cable to the user port 20 way connector

Beebspeak. If you know anything about this (what software it needs for instance), please let me know

Akhter hard disc host adaptor. Thanks to Ian Wolstenholme for the underside photo

I think this is some sort of video titler. Rediffusion board. Thanks to Lee for these photos. Any info on this would be appreciated

Thanks to Mark Smith for these photos of a Rediffusion board. Thanks to Peter Roozen for cleaning the pictures up

Thanks to Dave for these photos of a sound sampler. I think it is the Micro User one

ACP Electron disc interface

This is a 128K Ram upgrade that fits into the 6502 socket of the BBC B with a Read/Write switch fitted. As for the manufacture of this one, I am not 100% sure but I think it was United Disc Memories, it also needs a software to drive it. Thanks to Ken Hewson for the photos and info

Vine Micros "ROMBOARD 4". Thanks to Ken Hewson for these photos and info: This is a Vine Micros "ROMBOARD 4" fitted to a BBC Master 512. This ROM board is designed to allow four extra ROMs to be installed in the Master, these extra ROMs are able to overlay the RAM banks or the Cartridge slots or a combination of both, a Read/Write-protect switch is also incorporated. (a review of this board can be found in Micro User November 1987).
Solidisc real time clock
Solidisc four meg board

QFS Cumana Disc interface

Atom Disc interface board. Thanks to Geoff Stevens for these photographs
A UDM Sideways ROM/RAM board for the BBC. I cannot find any information for this board and would appreciate help. Thanks to Francois Joubert for the photo

ACP Advanced Plus 4 cartridge for the Electron. Gives the Electron a disc interface
Advanced SWR cartridge for the Electron
Advanced Quarter Meg Ram cartridge for the Electron

Master Ram board fitted into the Electron. This is the Electron Turbo
Joystick interface cartridge for the Electron

Electron Plus 1 insides with a PRES AP6 ROM Adaptor fitted

Econet Clock type 1. Thanks to John Kortink for these photos. Very high quality versions of these available on CDR-02

Econet Terminal type 1. Thanks to John Kortink for these photos. Very high quality versions of these available on CDR-02

Apex ROM RAM. Thanks to Paul Collins for these photos and info: It latches onto the Beeb motherboard through two elevated 40-pin ROM connectors at the back, has a flying dual-colour LED and there's four more flying leads to connect up. I have the manual (Altair.Jpg) and could write an in-depth or other if users needed so let me know on this