Addressing system for a multiple language character generator

Details Addressing system for a multiple language character generator Addressing system for a multiple language character generator

1981-09-11

1984-01-31

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340745, 340735, G09G 100

Patent

active

044293062

ABSTRACT:
A method and apparatus are disclosed for addressing a character generator memory containing symbols common to two or more languages in a common area of the character generator memory. Symbols which are special to the particular language being displayed are stored in one of a plurality of special symbol areas of the character generator memory. One of the special symbol areas contiguous with the common area is identified as a default symbol area. The proper special symbol area of the character generator memory is selected by comparing the high order bits of a display character code with compare bits to determine whether a different special symbol area of the character generator memory is to be substituted for the default area contiguous with the common area. If the compare bits indicate that a different special area of the character generator is to be substituted, the high order bits of the display character code are not directly used to address the character generator memory but are replaced by substitution bits to access that special symbol area unique to the language being displayed.

REFERENCES:
patent: 3996584 (1976-12-01), Plager
patent: 4057848 (1977-11-01), Hayashi
patent: 4122533 (1978-10-01), Kubinak

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