A detailed look at Sinclair 4K BASIC for the ZX80, covering its tokenized keyword input system, unique character set, string handling via CODE() and TL$() functions, graphics limitations, lack of INKEY$, and how the 1K RAM was shared between screen display and program memory. The post also examines the ZX80's symbol table approach to variable handling compared to contemporaries like the TRS-80 Level I BASIC, and includes a link to a browser-based ZX80 emulator.
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