Mostek z80 - Relative Address Specification; Implied Memory Address Pointer; Inline Arithmetic Operations; Equal Sign Function

3-9
3.9 RE~rIVE ADDRESS
Operands may be entered as a relative address if the character R preceeds
the hexadecimal operand. The relative offset (specified by the 0 command)
is added to the value entered to generate the absolute address.
3.10 Il~LIED MEMORY ADDRESS POINTER
1'he current value of the memory address pointer may be specified for the
operand by using the character "$". This is useful when making calculations
of parameters relative to the address in memory.
3.11 ADDED OR SUBTRACTED NUMBERS
Hexadecimal aritnmetic operations may be performed in line as operands are
entered. This is very useful for adding offsets and if used with the
implied memory address pointer, for canputing relative branch addresses.
3.12 EQUAL SIGN
When perfonning hexadecimal arithmetic, the current value of the operand may
be displayed by entering "="