Canon Kabushiki Kaisha

Masaki Nishiyama

Tsutomu Takahashi

Koji Fukunaga

Jiro Tateyama

Naohisa Suzuki

Hisatsugu Naito

Jun Oida

Susumu Takase

A peripheral apparatus, a control method for the peripheral apparatus, a memory medium, and an information processing system, in which performance of a connected host computer is not deteriorated are provided. For this purpose, when a status of the apparatus is a first status, a control mode is switched to the first mode such that in response to a data reading request which is issued from the host computer, when response data has been prepared, the response data is notified, and when the response data is not prepared yet, the fact that a response cannot be made is notified, and when the status of the apparatus is not the first status, the control mode is switched to the second mode such that in response to the data reading request which is issued from the host computer, the absence of the data to be responded is notified.

Peripheral apparatus, control method for peripheral apparatus, memory medium, and information processing system

A display device to realize a smooth scroll on a display screen is provided. This device comprises: a memory having a plurality of storage parts which can store information to be displayed which is formed by a plurality of dot lines on a line unit basis; transfer circuit for transferring the information stored in the memory to a video memory on a unit basis of one dot line or a plurality of dot lines less the total contained in the above line unit; a timer for controlling the transfer of the information from the memory to the video memory; display apparatus for displaying the information in the video memory; and a controller for scrolling the information which is displayed on the display screen on the display apparatus.

Display device in which display information is smoothly scrolled

A printing method and apparatus according to the present invention is capable of instructing whether or not a printing portion is used in a case where data is received from a host so as to be printed, and the initializing control required to perform printing can be skipped at the time of power supply if the printing portion is not used, or arranged to store a fact whether or not initialization has been performed so that whether or not the initialization is performed is controlled at the time of the power supply or when a printing opportunity has been issued.

Printing method and apparatus therefor

In a data transfer method, virtual handshake busy data is transferred to an I/O register when data is transferred through a parallel interface between data processing and printer units connected to the I/O register through a bus and a transfer storage area in the printer unit has an empty area having a predetermined amount or more.

Printing apparatus and method in which virtual busy signal is generated

There is disclosed an output apparatus comprising a storage having a submatrix obtained by means of dividing a character set where one character being formed of bit patterns of M rows by N columns into M1 rows by N1 columns for each character, an indexing submatrix group where different patterns in said submatrix are indexed and aligned, and an indexing number storing area for storing numbers used for looking up the indexing submatrix; and a control unit for making the indexing number storing area have a variable length.

High-efficiency compression suitable for use in character generation

For a paper feed operation, it is determined whether printing printing is being performed. When the printing is not performed, the paper feed is enabled even in the on-line state, thereby omitting a vain key operation. Further, a line feed key and a paper discharge key are set as the same key and a paper discharge stop function is provided, thereby enabling the line feed of a large amount to be executed by a smaller number of key strokes.

Printing method and apparatus

A method and apparatus for processing data, with the data processing side performing main control and the print control side including control for saving power. The print control side performs transition of a plurality of power saving states to obtain an optimal power saving state on the basis of transfer of data from the main control side, and the data processing side performs various control operations independently of the transition of the plurality of power saving states.

Method and apparatus for processing data

For a paper feed operation, it is determined whether printing is being performed. When printing is not performed, the paper feed is enabled even in the on-line state, thereby omitting a vain key operation. Further, a line feed key and a paper discharge key are set as the same key and a paper discharge stop function is provided, thereby enabling the line feed of a large amount to be executed by a smaller number of key strokes.

An information processing system that has a memory for storing information, a control memory for storing control information on the information stored in the memory, and a control unit for writing a signal representing 'under writing', 'under reading' or 'under transfer' into the control memory while information is written into, read from or transferred from the memory.

Information processing system for relocating data and changing status

A changeover control unit of an information processing system transmits data to either one of at least two input buffers such as a printer buffer, key buffer and the like, the data being transmitted via a single signal line or functionally a single signal line connecting the at least two input buffers and the control section of the machine. The data includes a communication control data for controlling the control section and the buffers, or an information processing data from the key buffer. The change-over control unit judges the code of the data, decides whether the data is for a printer buffer, key buffer or the like, and changes over the receiving positions for the data.

Information processing system for transmitting information from one

A memory control unit comprising: a first memory for storing a plurality of text information; a second memory for storing title information to segment those text information stored in the first memory; and control device which reads out the title information in the 2nd memory and the information regarding an empty memory area in the 1st memory and provides the empty area to the location next to the text information which will be changed in the 1st memory. When the empty area in the 1st memory is located behind the text information to be changed, other text information subsequent to that text is shifted to the backward location. When the empty area is located before the text information to be changed, that text is shifted to the forward location.

Memory control system responsive to determination, allocating adjacent

A data processing apparatus for processing text, words or characters has a key entry device, a memory for saving key data from the key entry device and processing means for sequentially processing the key data stored in the memory. When a same key of the key entry device is continuously depressed, the saving of the key data into the memory is suppressed.

Data processing apparatus having repeat function suppression for

An electropic typewriter includes a changing unit for changing margin positions; a storage device for storing hot zone position information; and a deriving unit responsive to the change of the margin positions caused by the changing unit for deriving a new hot zone so as to modify the hot zone position stored in the storage device.

Output device for automatically changing end of line hot zone

A display apparatus for displaying a dot pattern comprises a memory in which a plurality of character patterns are stored, a second memory in which second character patterns different from predetermined character patterns among the character patterns stored in the memory are stored, and a display device which can display both the character pattern stored in the memory and the second character pattern stored in the second memory. The second character pattern may be a bold, underlined, superscript, or subscript character pattern. When a desired character is displayed as a bold character, for example, the bold character is formed either by reading out the bold character from the second memory in which the bold character has preliminarily been stored or by changing the desired character to the bold character by a character pattern changing circuit.

Display apparatus adapted to display various types of modified characters

There is provided a pattern output apparatus to particularly output a dot pattern for use in a typewriter, word processor, computer, etc. This apparatus comprises: a memory in which a plurality of pattern information are stored; a read device for reading out the corresponding pattern information from the memory in accordance with an input code; a decision device for discriminating the state of the pattern information read out by the read device; and a device for forming a new code from the pattern information on the basis of the result of discrimination by the decision device. The portions of the codes which were not used so far for the purpose of the output of patterns in the code system consisting of a limited number of bits are used to output the patterns, so that a number of kinds of patterns stored efficiently in a code table can be efficiently outputted.

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Yokohama, Japan

Masaki Nishiyama