[Coco] CoCo 64k RAM upgrade on Ebay

[gene heskett]

On Tuesday, December 21, 2010 01:25:52 pm Rogelio Perea did opine:

> Looks like the chips included in the following auction:
> 
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320633337884
> 
> are the 16k ones *removed* after a CoCo 2 64k upgrade.
> 
> AFAIK the internal Radio Shack part number 8040517 defines a 16k x 1 RAM
> chip, while the RS part 8040665 is the 64k x 1 chip.
> 
> Looking at the zoomed in chips image, the middle top one (with an
> apparent smudge on the casing) appears to have p/n 8043517. Typo or
> photo illusion?
> 
I believe you are correct, but even if it was a 16k kit, I'd be wary, the 
one with the red magic marker might be a bum chip, that is how I usually 
marked them out myself when I had determined it was bad from the failed bit 
position.


> 
> 
> -- RP
> 
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-- 
Cheers, Gene
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