Ricoh Company, Ltd.

Ricoh Corporation

Chan W Kim

Tetsuro Motoyama

Banky Mor

Jimmy G Lo

Gregorio Rodriquez

Teturo Motoyama

A system for debugging an application program includes a debugging execution unit operated under an operating-system-free environment. The debugging execution unit includes a communication channel, a target processor unit for executing the application program and a first debugging program, and an interrupt vector swapper. The first debugging program includes a first set of input/output procedures for handling debugging communications over the communication channel, and the application program includes a second set of input/output procedures for handling communications over the communication channel associated with execution of the application program. Interrupt signals are generated when the target processor unit receives communications from the host processor unit. The target processor unit communicates with a host processor unit via the communication channel both when executing the application program and when executing the first debugging program. A first set of interrupt vector entries link interrupt signals generated during execution of the first debugging program to a first set of destination addresses. A second set of interrupt vector entries link interrupt signals generated during execution of the application program to a second set of destination addresses. A vector controller maps interrupt signals via the first set of interrupt vector entries during execution of the first debugging program, and maps interrupt signals via the second set of interrupt vector entries during execution of the application program.

Software system debugger with distinct interrupt vector maps for

A method and apparatus for controlling the buffer scan and placing the origin of the buffer allows software to control laser printer hardware in such a way that the hardware can scan data in a bit map correctly and send the data to a laser printer. The present invention places the output image from Y lines below the top of the page and X dots right from the left margin.

Method and apparatus for controlling the buffer scan in a printer

A method and apparatus for drawing wide lines in a raster graphics system such as a laser printing or display system utilizes a graphics processor with rectangle fill and single pixel line draw instructions. In a preferred embodiment, the present invention comprises a laser printer whose controller board main central processing unit (CPU) is a graphics processor and where the main firmware is a page description language interpreter.

Growing community of inventors

Fremont, CA, United States of America

Chan W Kim