Hitachi, Ltd.

Hayateru Mashima

Mitsuhiro Amari

In a printer control apparatus having a two-dimensional address type full dot memory, this full dot memory is constituted by a longitudinal/lateral-direction highspeed memory with a highspeed access operation along an x address direction, an oblique-direction highspeed memory with both access speeds in x address and y address direction, and another longitudinal/lateral-direction highspeed memory with a highspeed access operation along a y address direction. A directivity of a dot pattern is judged by a memory control unit, and this dot pattern is expanded from print data by a data processing unit, and then is written into a full dot memory. Any one of the longitudinal/lateral-direction highspeed memory, the oblique-direction highspeed memory, and the longitudinal/lateral-direction highspeed memory is selected based on the directivity judgment result to expand the dot pattern into the selected memory.

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Hadano, Japan

Hayateru Mashima