Character display apparatus with facility for selectively expand

Details Character display apparatus with facility for selectively expand Character display apparatus with facility for selectively expand

1979-01-22

1981-08-18

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340748, 340750, G06F 314

Patent

active

042849896

ABSTRACT:
Apparatus for modifying an alphanumeric display produced on a cathode-ray tube screen by raster scan to enable the selective generation of double height characters. In order to retain synchronism between line counters and the raster number modifiers are connected to the outputs of the counters to modify the addresses selected from a read only memory for generating the characters.

REFERENCES:
patent: 3895375 (1975-07-01), Williams
patent: 3991868 (1976-11-01), Robinson et al.

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