Fujitsu Corporation

Hiromitsu Nishimura

Akihiro Abe

Sumitake Kobayashi

Ichiro Kawabata

Atsuo Matsunaga

Tomomi Ohta

Seiichi Kamon

Ryozo Furutani

Yoshikazu Ohnishi

Nobuko Fujiwara

Noriko Nagano

Takaji Fujiwara

On the side of a microcomputer for creating image data, a unique code for showing the page alignment is added to the created image data, and on the printer device side, the unique code is detected independently from the ordinary data analysis. The unique code is constituted by a sequence of a predetermined number or more of identical data of one or more bytes. Based on the results of detection of the unique code, page control and recovery process are executed.

Page alignment indication method, page control method, printer system and printer device

When a control unit is in a non-operating (non-printing) state, data to be saved (character-image data) in a RAM cache memory is transferred to a disk cache memory at regular intervals in order of priority, thereby saving the data in the disk cache memory. If a power supply is cut off and then power is reintroduced, high-priority character-image data, which has been transferred from the RAM cache memory to the disk cache memory and saved in the disk cache memory when printing is not being carried out, is restored in the RAM cache memory. As a result, the high-priority data saved in the RAM cache memory when the power supply was cut off can be restored in the RAM cache memory, thereby raising the hit rate.

Method for saving generated character image in a cache system including

A method for transferring data from one memory to another within a memory hierarchy in a data processing system. The memory hierarchy includes a random access memory (RAM) cache within a control unit and a lower level disk cache memory. When the control unit is in a non-operating (non-printing) state, data to be saved (character-image data) in the RAM cache memory is transferred to the disk cache memory at regular intervals in order of priority, thereby saving the data in the disk cache memory. If a power supply is cut off and then power is reintroduced, high-priority character-image data, which has been transferred from the RAM cache memory to the disk cache memory and saved in the disk cache memory when printing is not being carried out, is restored in the RAM cache memory. As a result, the high-priority data saved in the RAM cache memory when the power supply was cut off can be restored in the RAM cache memory, thereby raising the hit rate.

Method of controlling data transfer and a safe shutdown in a

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Kawasaki, Japan

Hiromitsu Nishimura