Apparatus and method for displaying characters in a bit mapped g

Details Apparatus and method for displaying characters in a bit mapped g Apparatus and method for displaying characters in a bit mapped g

1983-12-23

1986-11-11

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340747, 340750, 340799, G09G 116

Patent

active

046225463

ABSTRACT:
An apparatus and a method for character and graphics pattern generation in a bit mapped graphics display system is disclosed that includes a pixel data manager 14 for supplying character bit maps and graphics patterns to a visible display memory 22. A character information memory 24 is utilized for the storage of character descriptive information which includes an address table 26, macro-instructions 28, 30, and 32, and character bit maps 34, 36, and 38. Each character in a set of characters has an associated macro-instruction and character bit map. The address table contains memory addresses that point to the macro-instructions. Each macro-instruction contains executable instructions that establish the size and location of a corresponding character bit map. To supply a character to the visible display memory, the pixel data manager fetches and executes a corresponding macro-instruction. Overhead burden on the central processing unit is minimized.

REFERENCES:
patent: 4115765 (1978-09-01), Hartke
patent: 4398190 (1983-08-01), Long et al.
patent: 4468662 (1984-08-01), Tanaka
patent: 4498081 (1985-02-01), Fukushima et al.

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