I was a little quick with my previous reply simply because I read it too
quickly.  You still can use the command interpreter, but try adding the
following code...

    PUB:CALC $57
    PUB:87, $57, %127
    PUB:SETVAR T,CHR($57)
    PUB:ECHO !T
    W
    PUB:

The "$" designates that you are supplying the known HEX value (use "%" to
supply an octal value).  This will return you the true ASCII character
representation and the appropriate numeric values in each base (decimal,
hex, octal).

Glenn Koster