Patent ID: 7330289

Claim:
A color image forming apparatus in which images of a plurality of element colors are sequentially transferred to form a color image, the color image forming apparatus comprising: control means for giving control data to be used for processing control of the image data associated with the element color; a plurality of temporary storage means, each being provided for each of the element colors and temporarily storing control data supplied from the control means in an address of its own obtained on the basis of the address supplied from the control means; writing selection means which generates, on the basis of the address supplied from the control means, the selection signal which selects one of the plurality of temporary storage means; image processing means which processes, on the basis of the control data stored in the plurality of temporary storage means, an image data associated with a received element color; printing means which performs transfer of an element color on the basis of the processing result of the image processing means and supplies a color code representing an element color which is being subjected to transferring to the image processing means; and an additional temporary storage means, provided in a manner as to constitute a pair with each of the temporary storage means, for causing the temporary storage means to be a write-enable state, wherein a logical sum of a selection signal generated at the writing selection means and a signal supplied from the additional temporary storage means is calculated so as to write, in accordance with the result of the calculation, the control data supplied from the control means.