Fiscal printer video with application program
AssigneeInternational Business Machines Corporation
InventorsRobert Thomas Cato, Wayne Roger Hucaby, Susan Ann Luerich
Life of this patent
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Abstract
The present invention discloses a method and system for controlling a system display from the processor controlling a fiscal printer. The system display is controlled by generating an overlay image in a storage device along with overlay image selector data. The overlay image selector data is used to control modifying circuits that can substitute or otherwise modify, with overlay image data, all or a portion of the system display image generated by application software. Since the fiscal printer hardware and firmware is not a part of the particular application software running on a point of sale device the control function of the fiscal printer need not require modification of application software or hardware.
Claims17
A system for controlling a display on an input and output device, comprising:
- a storage device for storing overlay image data;
- an overlay image controller coupled to said storage device, a display controller, and a processor controlling said device, said overlay image controller operable for receiving control signals from said display controller and generating addresses for reading out said overlay image data from said storage device;
- modifying circuits coupled to said display controller, said overlay image controller and a display, said modifying circuits operable for receiving system image display data, said overlay image data, overlay image selector data and modifying said system image display data in response to said overlay image data and said overlay image selector data;
- and
- display circuits operable for receiving said modified system image data and driving a display device for displaying a modified system image determined by said modified system image data.
A data processing system, comprising:
- a central processing unit (CPU);
- shared Random Access Memory (RAM);
- Read Only Memory (ROM);
- an I/O adapter;
- a fiscal printer system;
- a display adapter;
- a display;
- a user interface adapter;
- and
- a bus system coupling said CPU to said ROM, said RAM, said display adapter, said I/O adapter, said user interface adapter, said fiscal printer system coupled to said user interface adapter and said display adapter;
- wherein said fiscal printer system further comprises:
- a storage device for storing overlay image data;
- an overlay image controller coupled to said storage device, a display controller, and a processor controlling said fiscal printer, said overlay image controller operable for receiving control signals from said display controller and generating addresses for reading out said overlay image data from said storage device;
- modifying circuits coupled to said display controller, said overlay image controller and a display, said modifying circuits operable for receiving system image display data, said overlay image data, overlay image selector data and modifying said system image display data in response to said overlay image data and said overlay image selector data;
- and
- display circuits operable for receiving said modified system image data and driving a display device for displaying a modified system image determined by said modified system image data.
Dependencies are inferred from the claim text.