Graphics display apparatus.

摘要

A cell-organized graphic display apparatus is described in 'which a set of canonical or standard cells is stored in a character generator (17). A data processor (not shown) loads character codes into a character buffer (14) and attribute bits into an attribute buffer (16). Lines to be displayed are computed on a cell-by-cell basis by the processor using two canonical cells and the computed character codes are stored in the character buffer (14): attribute bits representing displacements of the required canonical cells are loaded into the attribute buffer (16). During accessing of the character generator (17), an adder (20) shifts the bit patterns in accordance with the attribute bits. Optionally a second character buffer (40), a second character generator (39) and a logic mixer (37) are used to allow logical combining of cell images in accordance with attribute bits.