Row addressable graphics memory with flash fill

Details Row addressable graphics memory with flash fill Row addressable graphics memory with flash fill

1995-03-06

1996-09-03

Tung, Kee Mei

Computer graphics processing and selective visual display system

Display driving control circuitry

Controlling the condition of display elements

395410, 345196, 345200, 36523001, 36523008, G06F 1206

Patent

active

055532292

ABSTRACT:
A single-chip semiconductor memory device optimized for high performance flat-shaded polygon video systems consists of a RAM with flash fill circuitry whereby the Start and End addresses are specified for a given row; the data within this range are read, modified, and written back to the memory in parallel thereby requiring a maximum of three memory cycles to fill a line segment independent of the length of the line. The data are modified according to a function between a color register and the data already present in the memory array, the functions being: AND, OR, EXCLUSIVE OR, or REPLACE.

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