9.43.8 Extended Addressing

The LDX pseudo-op is provided for loading the extended addressing bits of a label or address. For example, if an address _label resides in extended program memory, the value of _label may be loaded as follows:

 ldx     #_label,16,a    ; loads extended bits of _label
 or      #_label,a       ; loads lower 16 bits of _label
 bacc    a               ; full address is in accumulator A