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The Sinclair ZX80 was a low cost home computer introduced in 1980.

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Why does the ZX80 not produce a steady display signal?

As Tommy pointed out in my question about BASIC tokens on the ZX Spectrum, the ZX80 is a computer which does not produce a signal which is displayed steadily on the TV. It looks to me as if the CRT is ...
11
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ZX80 BASIC checking free memory

Did ZX80 BASIC have a way to check how much memory you were using and how much was left? Or otherwise: if you were writing a program on a machine with the RAM expansion, was there a way to tell ...