The assembler syntax closely follows the 'Z80 family CPU User Manual' by Zilog. In expressions a single ‘=’ may be used as “is equal to” comparison operator.
Suffices can be used to indicate the radix of integer constants; ‘H’ or ‘h’ for hexadecimal, ‘D’ or ‘d’ for decimal, ‘Q’, ‘O’, ‘q’ or ‘o’ for octal, and ‘B’ for binary.
The suffix ‘b’ denotes a backreference to local label.