Abstract: An image source apparatus includes: a driver, operable to send the image data to the printer and to cause the printer to execute the printing based on the image data, in accordance with a prescribed standard; an application processor; and a storage. When the driver receives an initialization request from the application processor, the driver, after notifying the application processor of an acknowledgement of the initialization request, carries out an initialization process in accordance with the received initialization request, and the driver, after finishing the initialization process, acquires information on a plurality of items related to a specification of the printer from the printer in accordance with the prescribed standard and stores the information in the storage.

Abstract: A printing device for receiving data from a data source apparatus via a communication interface in which one of two connected communication apparatuses is a communication master and the other is a communication slave, the communication master being able to connect to a plurality of communication slaves but the communication slave being able to connect to only one communication master, does not suffer a deterioration in throughput even when the device becomes a communication slave upon reception of a connection request. When a printing device is connected to a first external device, and a connection request outputted from a second external device is detected, first the role of the printing device is set as a communication slave, and then, at a predetermined timing (for example, when a physical connection is established), the role of the printing device is switched from a communication slave to a communication master.

Abstract: An image source apparatus includes: a driver, operable to send the image data to the printer and to cause the printer to execute the printing based on the image data, in accordance with a prescribed standard; an application processor; and a storage. When the driver receives an initialization request from the application processor, the driver, after notifying the application processor of an acknowledgement of the initialization request, carries out an initialization process in accordance with the received initialization request, and the driver, after finishing the initialization process, acquires information on a plurality of items related to a specification of the printer from the printer in accordance with the prescribed standard and stores the information in the storage.

Abstract: An output device includes a radio communication interface portion having a communication port that can receive data from a mobile terminal, a displaying portion for informing of a communication state upon receiving the data via the communication port, and an outputting portion for executing an outputting process based on the data that are received via the radio communication interface portion. The displaying portion and the communication port are positioned in a same visual field as an operator who operates the mobile terminal to transmit the data from a position that is a maximum communicable distance away from the communication port.

Abstract: A system is provided for enabling the efficient reuse of printing data stored in a printer to execute printing without retransmission of printing data. The system comprises data management means, which, when a printing request received from a client device is of a type involving the transmission and reception of printing data, stores the printing data received from the client device in storage means in association with management information, and transmits the management information to the client device; means which, when the printing request is of a type involving the transmission and reception of management information associated by the data management means, references the above storage means and reads out the printing data associated with the management data received from the client device; and means to execute printing based on the printing data.

Abstract: An object of the present invention is to ensure that a printing device for receiving data from a data source apparatus via a communication interface in which one of two connected communication apparatuses is a communication master and the other is a communication slave, the communication master being able to connect to a plurality of communication slaves but the communication slave being able to connect to only one communication master, does not suffer a deterioration in throughput even when the device becomes a communication slave upon reception of a connection request.

Abstract: What is disclosed is an emulator that emulates on an execution machine the operation of a target machine. The emulator emulates routines that are called via a jump table such as the BIOS. Control is transferred to an emulation module not by directly trapping the procedure to call the BIOS but by placing a privileged instruction (a halt instruction, for example) in the area called and by causing a trap through the execution of the privileged instruction. An identifier is placed after the halt instruction and a needed BIOS emulation module is called by a dispatcher using this identifier. Therefore, normal operation can be obtained even if there is a resident program which rewrites the jump table.

Abstract: To provide an oblique projection type displaying apparatus for radiating rays of light which are nearly parallel with a light bulb, thereby preventing the brightness of a resultant image from becoming uneven, the apparatus comprises a light source, optical modulating means, projecting means for projecting an image generated by the optical modulating means on a screen, and the screen, wherein a center optical axis of rays of light projected by the projecting means are obliquely entered into the screen, wherein the projecting means comprises first projecting optical means for converting an image generated by the optical modulating means into an intermediate image with trapezoidal distortion, and second projecting optical means for converting the intermediate image with trapezoidal distortion into an image without trapezoidal distortion on the screen, and wherein the first projecting optical means comprises two lenses which are not parallel each other.