I posted a message on the Unicode mailing list, which eventually lead to an proposal to accept a large number of new characters that encodes symbols used in the old 8 and 16-bit micros.
My original question was specifically about the C64 character set, but we managed to get several others covered as well, including several symbols from the Atari ST character set.
The proposal was accepted, and the work continues to create a new proposal covering the character sets of even more old computers.
My original question was specifically about the C64 character set, but we managed to get several others covered as well, including several symbols from the Atari ST character set.
The proposal was accepted, and the work continues to create a new proposal covering the character sets of even more old computers.
https://www.unicode.org/L2/L2019/19025-terminals-prop.pdf
I'm quite happy that my modest question led to some real progress.