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From | To | Subject | Date/Time | |||
mark lewis | Ed Vance | High ASCII Characters |
April 18, 2018 8:31 AM * |
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On 2018 Apr 10 06:58:00, you wrote to Daryl Stout: EV> I'm wondering if everyone sees the same thing that I see on my screen. EV> Let Me know. Thanks. the U+2345 stuff is UNICODE... it is not CP437 which you are used to... CP437 is being forcibly left in the dirt and everything is moving to UNICODE (aka UTF-8)... the reason you see the differences that you do is because those characters that you used to make the band aide are not in the same location in UTF-8 as they are in CP437... CP437 is derived from a byte, 8 bits... because of that, CP437 is limited to only 256 characters... UTF-8 is four bytes, 32bits, and has 1112064 code points... not characters... each code point can be a character on its own or it can be combined with other code points to make other characters... an example would be something like the o with the rooftop (aka circumflex SHIFT-6)... in CP437 you see it as ALT-147... in UTF-8 it is U+00F4... how you would type that on your keyboard, i don't know... the old ALT codes we used to use are going away and all the characters are moving /except/ for the letters and basic symbols... look here: https://en.wikipedia.org/wiki/Code_page_437 i hope you will see the majik... in the chart, you have the character (on top), the unicode value (in the middle) and the alt value (on the bottom)... eg: ô 00F4 147 i cannot use the ALT codes any more... now, on my linux, i have to use what is known as "composing"... to make this character, i have to use my "compose key" and then the two characters "o" and "^"... they are composed together to make the final ô character... on my system, when reading these messages, i'm forcing things into CP437 but these characters like this i see as two characters... in this case, the tilde "~" and the capital "S"... i don't see the "o" with the rooftop unless i switch to unicode instead of CP437... eventually, all of these fancy things like the bandaid and frame characters we're used to seeing in the old DOS CP437 world will be harder to do... especially since much of it is simply being dropped and no one has yet created a convertor to convert these characters to the UTF-8 equivelent... there are a few BBSes doing this conversion in code so the old CP437 style screens can be used... they are actually transmitting the UTF-8 characters instead of the CP437 characters... it would be nice to have a conversion program that does the same thing and converts the actual screens... the thing is, right now, i don't know how that would affect the ANSI color and cursor positioning codes... probably not but... hope this helps... i still have to work really hard to wrap my head around it... )\/(ark Always Mount a Scratch Monkey Do you manage your own servers? If you are not running an IDS/IPS yer doin' it wrong... ... Don't get so tolerant that you tolerate intolerance. --- * Origin: (1:3634/12.73) |
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