Hexadecimal Representation
To specify a non-printing character in terminal monitor, use a hex (hexadecimal) constant.
Hex constants are specified by an X followed by a single-quoted string composed of (an even number of) alphanumeric characters. For example, the following represents the ASCII string ABC<carriage return>:
X'4142430D'
A = X'41', B = X'42', C = X'43', and carriage return = X'OD'.
An alternative is to use a prefix of 0x. That is, 0xstring composed of (an even number of) alphanumeric characters:
0x4142430D
A = 0x41, B = 0x42', C = 0x43, and carriage return = 0xOD.