Seiko Epson Corporation

Kazuyoshi Utsumi

Keiichi Taguchi

Ken Yoshizuka

Noriyoshi Chiba

Michio Yoshitake

Michitoshi Ishihara

Mitio Maruyama

A data processing apparatus for writing data to a recording medium having a predetermined file system configured therein includes the following elements: an insertion portion that removably holds the recording medium, the data processing apparatus writing data to the recording medium inserted in the insertion portion; an insertion/removal detector that detects that the recording medium is inserted in or removed from the insertion portion; a writing state storage unit that stores, when the insertion/removal detector detects removal of the recording medium, a data writing state upon removal of the recording medium; and a restoration/analysis determining unit that determines, when the insertion/removal detector detects insertion of the recording medium, whether it is necessary to perform analysis regarding restoration of the file system configured in the inserted recording medium on the basis of the state stored in the writing state storage unit.

Data processing apparatus and method for restoring a file system

An image formation device has an image carrier and a development device () into which development units housing toner are detachably installed. The development units have storage device storing color and toner amount remaining information. And the image formation device operates in monochrome printing mode when development units of the same color are installed. The image formation device has display unit () to display the toner remaining amount in development units, and control unit which acquires color and toner amount remaining information in the storage device, and executes control to enable switching between a separate remaining amount display mode (A,C) to separately display on the display unit the toner amount remaining in each of installed development units corresponding to installation positions, and a total remaining amount display mode (B,D) to display on the display unit the total toner amount remaining in installed development units of the same color.

Image formation device enabling switching display of remaining developing agent in monochrome printing mode

A printing system that comprises a host computerand a printerin combination. As the printeris used one that can process a first class print request including a control program and print data and a second class print request including only print data, and, when an ID output request is received, sends a control program ID as identification information of a control program stored inside the printerat that point of time. Printer control softwareis installed on the host computerto put the computerin a state that, when a print request is to be outputted to the printerthe computerverifies whether a required control program is stored within the printerand the computersends a second class print request to the printerwhen storing of the control program is verified, and sends a first class print request to the printerwhen storing of the control program is not verified. Thus, it is possible to realize a printing system including a such type of printer that can process print data of various language and downloads a control program, having a shorter average time required for printing.

Printing system in which programs required for printer operation are downloaded from computer

A program space for executing a program is set in the logical memory space of CPU and the address translating destination of the program space can be set in a switching mode between a ROM as a first memory and a RAM as a second memory. Thus, the address translating destination of the program space is set in the ROM when the executing speed is made increasable by utilizing the RAM as a system memory because of the presence of bulk processing data, whereas the address translating destination of the program space is set in the high-speed RAM when the RAM has a sufficient space margin.

Growing community of inventors

Nagano-ken, Japan

Kazuyoshi Utsumi