Attribute control method and apparatus

Details Attribute control method and apparatus Attribute control method and apparatus

1986-02-21

1988-07-05

Brigance, Gerald L.

Communications: electrical

Land vehicle alarms or indicators

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

340732, 340750, G09G 116

Patent

active

047558148

ABSTRACT:
An apparatus for controlling visual attributes associated with characters displayed on a video display screen including a video memory for storing multiple data words corresponding to screen character locations, an attribute memory associated with the video memory for storing visual attribute codes and an attribute propagation store associated with the attribute memory for controlling visual attribute code propagation. A latch controls writing into the attribute propagation memory, a control bit for controlling visual attribute code propagation. The apparatus also includes a video display generator and control logic responsive to the control bit for causing a predetermined attribute code to be propagated for a preselected number of screen character locations.

REFERENCES:
patent: 4249172 (1981-02-01), Watkins et al.
patent: 4386410 (1983-05-01), Pandya et al.
patent: 4394650 (1983-07-01), Long et al.
patent: 4414645 (1983-11-01), Ryan et al.
patent: 4451824 (1984-05-01), Thayer et al.
patent: 4454593 (1984-06-01), Fleming et al.
patent: 4520356 (1985-05-01), O'Keefe et al.

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