Addressing mode

From C64-Wiki
Jump to: navigation, search

An addressing mode one of a set of pre-set methods in which the "target address" for many machine language instructions is specified. Some instructions supports only a single addressing mode, whereas others may support up to eight of the 13 available addressing modes, which are:

In some assemblers and machine language monitors, implied and accumulator addressing are taken to be the same, so that e.g. an ASL performed on the accumulator is written as merely "ASL", whereas others distinguish between the two, requiring an ASL on the accumulator to be stated as "ASL A".