†"Modified ASCII"? Only the printable characters and space. Will not work with numbers requiring encoding to non-printable characters. "¡" is used to represent non-printable characters. U+00A1 ("¡") is the first printable character past the ASCII range.

††"Latin-1"? Only the printable characters and space. Will not work with numbers requiring encoding to non-printable characters. "Ā" is used to represent non-printable characters. U+0100 ("Ā") is the first printable character past the extended ASCII range. (See https://en.wikipedia.org/wiki/List_of_Unicode_characters#Latin_Extended-A)

For other interesting base conversion projects see multibase and base65536.