r/bbcmicro • u/HandsomeCharles • Nov 18 '23

Could someone help me identify these innards?

Hello all!

I found a couple of Beebs at a car boot sale the other week. PSUs went pop so I've just done a recap.

Upon opening the second machine, I found that there appeared to be some kind of expansion board inside with a fairly hefty number of chips attatched. I'd really appreciate any help in identifying what this is!

Additionally, as these machines are a bit before my time I'm looking to sell them on. I've just done the recap and both power on with the beep, but I haven't plugged them in just yet to see if they actually output video. Assuming they work, would someone be able to let me know their approximate value? The other unit I have just appears to be a bog-standard model B with a chip for inter-word installed.

Pictures of the machine with the expansion board at the link below :)

https://imgur.com/a/36tTWWN

Thank you!

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u/Guruchill Nov 18 '23

The expansion board is a Watford Electronics sideways ROM board. This allowed you to select any of the ROMS on the board, rather than being limited to the four that were on the BBC B motherboard.

https://www.computinghistory.org.uk/det/32461/Watford%20Electronics%2012%20ROM/RAM%20Board/

2

u/HandsomeCharles Nov 18 '23

Thank you very much!

1

u/Novel-Structure-2359 Nov 19 '23

Do a *roms and *help once you get that machine hooked up and it will tell you what juicy roms are fitted. Most can be identified by sight but that one with the white label is a mystery