> Gosh, that brings me back. All those characters that were BASIC keywords
> compressed into one octet. How could we have neglected to encode such important
> legacy characters, this unnecessarily complicates round-trip conversion between
> ZX80s and Unicode.

Indeed. http://www.howell1964.freeserve.co.uk/ZX81/ZX81_BASIC/ZXBASIC_A.htm

And someone already has PETSCII (Commodore 64) to Unicode mapping:
http://www.df.lth.se/~triad/krad/recode/petlc/
(warning: several images cross-linked to charts.unicode.org)

> 

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