im not sure what ascii delimited is but i know ascii is just a numeric representation for the various characters.
a = 97;
b = 98
and so on.
get the full table over at http://www.asciitable.com
there is a php function [man]ord[/man] which gives the ascii value of a character, and then [man]chr[/man] which goes the other way.
i know you can do thigns in hex format, like in c/c++ where they do,
unsigned char var[] = "\x0A\x2B\x97\x100";
like that. you can easily get the hex value as the ascii decimal value and then do stuff.
im not sure if that helped at all or was related 🙂.