An image forming apparatus in which a memory has a first storage area for storing
information related to image formation as predetermined unit data and a second
storage area for storing the information as bit-unit data. A printer control unit,
which controls writing/reading of the information related to image formation to/from
the memory, stores the information related to image formation, stored in the first
storage area as the predetermined unit data as the bit-unit data, into said second
storage area.