I took some screen grab pics which give a clue to the morphing of the zx81 into spectrum from humble beginning- the umbilical chord if you like
Published on Apr 3, 2019
Wires, chips, hand-written key caps, somehow this early version of the Sinclair ZX Spectrum survived. Jason Fitzpatrick of the Centre for Computing History demonstrated.
Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
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