Supported characters/codes:
- Code set A: ASCII codes 0-95 (chars 0-9, A-Z, special, control).
- Code set B: ASCII codes 32-127 (chars 0-9, A-Z, a-z, special).
- Code set C: ASCII codes 48-57 (chars 0-9 in double density).
Javascript backslash escapes are supported, e.g. \n, \x0a, \u000a (use \\ to get a literal backslash). Codes for code set switching/shifting and FNC codes are currently not supported, except for auto-switching from code set C to A for the last digit when there's an odd number of digits.
Code setInput text: