[tialaramex]

There's some confused or misunderstood stuff in here but I guess it's just somebody doing the equivalent of musing out loud about what they've learned? I noticed:

Those aren't "ASCII code pages". "Code pages" are a way to talk about character encodings, mostly these days used by Microsoft in its Windows operating systems, but historically because IBM's manuals would dedicate a whole page to each such encoding. They aren't "ASCII" code pages, although many of them reserve the first 128 codes for the same things ASCII put there.

"The upper 128 bits from the ASCII table" is presumably a mistake and means the upper 128 code values maybe?

It's called "us-ascii" because that's the name IANA assigned to the ASCII encoding. IANA keeps registries of a lot of stuff... here's the one with character sets in it: https://www.iana.org/assignments/character-sets/character-se...

[Izkata]

> "The upper 128 bits from the ASCII table" is presumably a mistake and means the upper 128 code values maybe?

Probably, the bullets at the start say "upper 128 positions".