Section erasure control apparatus of character generator
AssigneeGoldstar Co., Ltd.
InventorYong G. Oh
Life of this patent
Estimating the term…
Abstract
A section erasure control apparatus for a character generator including a section erasure data receiving circuit for receiving section erasure data a section erasure region control circuit for analyzing the section erasure data and identifying a section erasure region and a decoder for decoding output data from the section erasure region control circuit and outputting an erasure execution signal identifying the section erasure region in accordance with the decoding.
Claims13
A section erasure control apparatus for a character generator for removing an erroneous character inserted during interfacing of the character generator with a microprocessor, comprising:
- section erasure data receiving means for receiving section erasure data, including a section erasure start address, a section erasure end address, and erasure on/off bit data as one data block from a memory of the microcomputer;
- section erasure region control means for analyzing said section erasure data and identifying a section erasure region which defines all character areas to be erased;
- and
- decoding means for decoding output data from said section erasure region control means and outputting an erasure execution signal identifying the section erasure region in accordance with said decoding;
- said character generator erasing all character areas to be erased in accordance with the erasure execution signal.
A section erasure control apparatus for removing an erroneous character inserted during interfacing of a character generator with a microprocessor, comprising:
- section erasure address receiving means for receiving a section erasure start address, a section erasure end address, and erasure on/off data as one data block from a memory of the microprocessor;
- and
- section erasure means for erasing a section, defined by the section erasure start address and the section erasure end address, according to the erasure on/off data, which includes all character areas to be erased.
A section erasure control apparatus for a character generator for displaying characters on a screen, said erasure control apparatus removing an erroneous character inserted during interfacing of the character generator with a microprocessor, said section erasure control apparatus comprising:
- a section erasure register for receiving, storing, and outputting section erasure data, which defines all character areas to be erased, as one data block from a memory of the microprocessor;
- a counter for counting, using a signal output from a character magnitude oscillator as a clock signal;
- a comparator for comparing an output signal of said counter with the section erasure data output from said section erasure register;
- a decoder for decoding the output signal of said counter and outputting an erasure execution signal;
- said character generator erasing all character areas to be erased in accordance with the erasure execution signal;
- and
- an inverter for inverting the section erasure data output from said section erasure register and outputting the inverted section erasure data as a reset control signal for resetting said decoder.
A character display apparatus, comprising:
- a microprocessor, including a memory for storing character information and section data, wherein the section erasure data defines an erasure region including all character areas to be erased, the section erasure data including a section erasure start address, a section erasure end address, and/or erasure on/off bit data;
- a character generator, receiving the character information and the section erasure data from said microprocessor as one data block, displaying characters in accordance with the character information, and executing an erasure operation for the entire erasure region.
A method of character display and erasure, comprising the steps of:
- a) storing character information and section erasure data in a memory of a microprocessor, wherein the section erasure data defines an erasure region including all character areas to be erased, the section erasure including a section erasure start address, a section erasure end address, and/or erasure on/off bit data;
- b) transmitting the character information and the section erasure data as one data block from the memory of the microprocessor to a character generator;
- c) displaying characters in accordance with the character information;
- and
- d) executing an erase operation for all character areas defined by the section erasure data.
Dependencies are inferred from the claim text.