Graphics display apparatus

Details Graphics display apparatus Graphics display apparatus

1980-04-24

1982-05-18

Smith, Jerry

Boots, shoes, and leggings

340739, 340750, 364719, G06F 3153

Patent

active

043308341

ABSTRACT:
In a cell-organized graphic display apparatus a set of canonical or standard cells is stored in a character generator. A data processor loads character codes into a character buffer and attribute bits into an attribute buffer. Lines to be displayed are computed on a cell-by-cell basis by the processor using pairs of canonical cells and the computed character codes are stored in the character buffer and attribute bits representing displacements of the required canonical cells are loaded into the attribute buffer. During accessing of the character generator, an adder shifts the bit patterns in accordance with the attribute bits. Optionally a second character buffer, a second character generator and a logic mixer are used to allow logical combining of cell images in accordance with attribute bits.

REFERENCES:
patent: 3729730 (1973-04-01), Sevilla et al.
patent: 3781850 (1973-12-01), Gicca et al.
patent: 3810166 (1974-05-01), Atkin
patent: 3821730 (1974-06-01), Carey et al.
patent: 4158837 (1979-06-01), Zahorsky
patent: 4163229 (1979-07-01), Bodin et al.
patent: 4246578 (1981-01-01), Kawasaki et al.

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