Then reverse engineer one for yourself (presumably from a photomicrograph):
Vintage computers on show at Bletchley Park - V3.co.uk Labs - a blog from V3.co.uk
![](http://www.v3.co.uk/IMG/056/161056/spectrumulabreadboard-jpg.JPG?1296556138)
http://www.zxdesign.info/
Vintage computers on show at Bletchley Park - V3.co.uk Labs - a blog from V3.co.uk
http://www.zxdesign.info/
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