Sandbox

This is a sandbox, where anyone can test. The other editable special page is Public talk. Feel free to add a link to editable special pages in your or talk page. Therefore things that seem or are non-sensical to other or all people are allowed.

All uppercase was what was used in some machines in the past, as only 64 characters (6 bits) were encoded, instead of 128 (7 bits) that ASCII uses. You can see this as something like 20 to 5F below, as opposed to 00 to 7F:

The 00 to 1F and 7F are control characters, and are used for things like new line (enter key) and tab. 80 to FF was used in 8-bit encodings for different sets of foreign language letters and symbols. Here is one for Western European (CP-1252). AD is like minus but only appears at the end of lines, which is typographical. A0 is no-break space, so that words next to it will stay on one line. 81, 8D, 8F, 90 and 9D are undefined.

Custom Font replaced some characters in above with math symbols.

Some machines didn't use 8-bit, instead, they replaced some of the characters with foreign letters (ISO 646). Here is an example for French:

This one includes more letters:

Due to a French reform making the letter é more frequent, î is sometimes replaced by É. There are similar character sets for many languages.

However, for closed caption decoders, the character set is different. The anomalies are in bold. 11 is placed before 30 to 3F for different sets of foreign language letters and symbols.

Special characters (11xx). 3A is a non-breaking space.

Custom Font replaced 00 with a full space, and 1E with a subscript exponent symbol.

Comparison of Terminus and Custom Font at 6x12 size: http://i. imgur.com/gVCYiQf.png

Note: The full space (█) is in the null character (00) in Custom Font, not shown. This is used as non-existent character symbol by Windows, so this hack allows to use this character.