Fujitsu MB86R02 Jade-D Hardware Manual page 535

Graphics controller

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MB86R02 'Jade-D' Hardware Manual V1.64

G_BeginE (Format 5)

This is the extended G_Begin command.

When using the following functions, this command must be executed instead of G_Begin.

• Mode register(MDR1S/MDR1B/MDR1TL/MDR2S/MDR2TL/GMDR1E/GMDR2E)

• Log output of device coordinates

G_VertexLOG/G_VertexNopLOG

• Polygon with Z or texture

The G_BeginE command sets types of primitive for geometry processing and drawing. Vertex

setting/drawing using the above extended function is performed using the G_Vertex* command.

The G_Vertex* command must be set between the G_BeginE command and the G_EndE

Only G_Vertex/G_VertexLOG/G_VertexNopLOG or SetColorRegister(XY only vertex) or

OverLapZofft can placed between G_BeginE and G_EndE.

Triangle_Strip*

Triangle_Fan*

Usable combinations of GMDR0 mode setting and primitives are as follows:

Unclipped primitives (nclip*)

Other than above

Primitives other than unclipped primitives

*1: Shading is not assured.

*2: In case of drawing polygon with Z,ST=1, the algorithm is approximate calculation. The

triangle algorithm is more accurate.

Handles primitive as point

Handles primitive as independent line

Interpolation of the joint and broken line pattern is not supported.

Handles primitive as polygon

Handles primitive as independent triangle

Handles primitive as line strip

Handles primitive as triangle strip

Handles primitive as triangle fan