Texture Coordinates; Frame Buffer - Fujitsu MB86R02 Jade-D Hardware Manual

Graphics controller

Hide thumbs Also See for MB86R02 Jade-D:

Table of Contents

MB86R02 'Jade-D' Hardware Manual V1.64

Texture coordinates

Texture coordinate is a 2D coordinate system represented as S and T (S: horizontal, T: vertical). Any

integer in a range of −8192 to +8191 can be used as the S and T coordinates. The texture coordinates

is correlated to the 2D coordinates of a vertex. One texture pattern can be applied to up to 4096 ×

4096 pixels. The pattern size is set in the register. When the S and T coordinates exceed the

maximum pattern size, the repeat, cramp or border color option is selected.

For drawing, the following area must be assigned to the Graphics Memory. The frame size (count of

pixels on X direction) is common for these areas.

Drawing frame

The results of drawing are stored in the graphical image data area. Both the direct and indirect

color mode are applicable.

Z buffer is required for eliminating hidden surfaces. In 16 bits mode, 2 bytes and in 8 bits mode, 1

byte are required per 1 pixel.

Polygon drawing flag buffer

This area is used for polygon drawing. 1 bit is required per 1 pixel.