The semicolon `;' is the line comment character;
The dollar sign `$' can be used as a prefix for hexadecimal numbers and as a symbol denoting the current location counter.
A backslash `\' is an ordinary character for the Z80 assembler.
The single quote `'' must be followed by a closing quote. If there is one character inbetween, it is a character constant, otherwise it is a string constant.