Trying to identify RAM upgrade.

Upgrade your RAM from ST to Falcon.
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stephen_usher
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Trying to identify RAM upgrade.

Post by stephen_usher » Sun Sep 08, 2019 10:49 am

I had a 2MB RAM upgrade fitted by Third Coast Technologies to my 520STM back in 1989 and I would like to identify the manufacturer and determine just what I need to do (other than populate the other half of the board with 1Mbx1 chips) to bring the machine up to 4MB.

There don't look to be any jumpers so I'm guess it that it's merely a case of disabling the internal RAM.

Anyway, here are the pictures of the main RAM board:
IMG_1575.jpg
IMG_1575.jpg (219.55 KiB) Viewed 50 times
IMG_1576.jpg
IMG_1576.jpg (140.51 KiB) Viewed 50 times
P.S. I do have the instruction manual supplied with it somewhere but it's an n'th generation photocopy and is/was a completely unreadable mess.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.

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