18 Oct
2006
18 Oct
'06
2:04 p.m.
Jules Richardson wrote:
Does anyone know if the Sinclair Spectrum ever made use of RAM chips
that were known to be part-faulty as-new? This was just asked over on
another mailing list...
Yes. The upper 32k were supposed to be 4164s. There are sets of
jumpers on board to allow for a couple of different types of chips and
to switch which "half" is in use.
Naturally, all the chips need to be the same. I learned this the hard
way when cannibalising dead Spectrums for bits when I was a skint spotty
teenager.
Gordon.