Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1993-05-07
1994-07-26
Shaw, Dale M.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
395775, 345155, G06F 1520
Patent
active
053332610
ABSTRACT:
The graphics processing apparatus of the present invention utilizes individual registers of a register file to store the X and Y coordinates of pixels. These X and Y coordinates though formed into a single data word are separable by, for example, having the most significant bits specifying the Y coordinate and the least significant bits specifying the Y coordinate. The graphics processing apparatus supports instructions which provide separate and independent data manipulation of these X and Y coordinates. These X Y coordinate manipulation instructions can provide for separate X Y arithmetic operations on two data words, separate X and Y compare operations, separate X and Y data move operations and a conversion between the X Y address form to the linear address form. This technique is highly useful for manipulation of X Y address coordinates in a visual display system employing bit mapped graphics.
REFERENCES:
patent: 5095301 (1992-03-01), Guttag et al.
patent: 5140687 (1992-08-01), Dye et al.
patent: 5142621 (1992-08-01), Guttag et al.
Asal Michael D.
Guttag Karl M.
Novak Mark F.
Tebbutt Neil
Bassuk Lawrence J.
Donaldson Richard L.
Marshall Robert D.
Shaw Dale M.
Texas Instruments Incorporated
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