Apparatus for alpha-numeric/graphic display

Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...

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340711, 340750, 340745, 340734, G09G 114

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active

045048266

ABSTRACT:
In a computer system operating under read only memory control and having a keyboard, a video terminal, and a port device in the form of a tape recorder/player, an improved apparatus for alpha-numeric/graphic display in which the outputs of respective character and graphic generators couple to respective first and second shift registers with the shift registers being controlled by first and second gate means in a manner to enable clocking of the first shift register when the type code indicates alpha-numeric display and enabling clocking of the second shift register when the type code indicates graphic display.

REFERENCES:
patent: 3849773 (1974-11-01), Katahira et al.
patent: 4158837 (1979-06-01), Zahorsky

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