Character constants

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Character constants are used when you want to use the code for a particular character.

To specify an ASCII character constant, prefix the constant with a ' (single quotation mark). Character constants can appear anywhere an arithmetic constant is allowed, but you can only specify one character constant at a time. For example 'A represents the ASCII code for the character A.

Character constants are convenient when you want to use the code for a particular character as a constant, for example: 

cal 3,'X(0)
# Loads GPR 3 with the ASCII code for
# the character X (that is, 0x58).
# After the cal instruction executes, GPR 3 will
# contain binary
# 0x0000 0000 0000 0000 0000 0000 0101 1000.