IMAGE FORMING APPARATUS

摘要

Data from a drawing engine main part (101) is sent to a FIFO (First In First Out) memory (102), temporarily stored there and sent to a high speed cache memory (104) through an arithmetic unit (103). Data are transmitted between this cache memory (104) and a frame buffer (105). A cache controller (106) prefetches the contents of the FIFO memory (102) and controls the cache memory (104) so that all the data of the same page which is stored inside the frame buffer (105) and to which high speed access can be made can be read and written. In this way, high speed access can be made and the drawing speed can be improved though an economical frame buffer is used.