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7<TITLE>GP Command Templates</TITLE>
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10<H1 align="left">GP Command Templates</H1>
11
12<H2>Description</H2>
13<P>The Graphics Processor (GP) has 4 basic command types:</P>
14
15<H3>CP Commands</H3>
16<P>These commands are used to write to CP registers. All CP commands have the following format:</P>
17<PRE>| 8 bits     | 8 bits     | 32 bits    |
18| cmd. token | reg. addr. | reg. value |</PRE>
19<P>CP has its own unique register address space.</P>
20
21<H3>XF Immediate Commands</H3>
22<P>These commands are used to write XF registers. All immediate XF commands have the following format:</P>
23<PRE>| 8 bits     | 16 bits    | 16 bits    | 32 bits * length |
24| cmd. token | length - 1 | 1st addr. | reg. value(s)    |</PRE>
25<P>Maximum length (the number of values being sent) is 16.<br>Note that a length field of 0 indicates that data is to be sent to Register 1.<br></P>
26<P>XF has its own unique register address space.</P>
27
28<H3>XF Indexed Commands</H3>
29<P>These commands are also used to write XF registers. There are 4 different XF index units that are typically used in the following ways:</P>
30<UL>
31<LI>A: position coordinate matrices
32<LI>B: normal matrices
33<LI>C: texture coordinate generation matrices
34<LI>D: light objects
35</UL>
36<P>All indexed XF commands have the the following format:</P>
37<PRE>| 8 bits     | 16 bits     | 4 bits     | 12 bits    |
38| cmd. token | index value | length - 1 | 1st addr. |</PRE>
39<P>Maximum length (the number of values being sent) is 16.<br>Note that a length field of 0 indicates that data is to be sent to Register 1, and so on.<br></P>
40<P>XF has its own unique register address space.</P>
41
42<H3>BP Commands</H3>
43<P>These commands are used to write all bypass (raster state) registers (SU through PE).<br>All BP commands have the following format:</P>
44<PRE>| 8 bits     | 8 bits     | 24 bits    |
45| cmd. token | reg. addr. | reg. value |</PRE>
46<P>When specifying a BP command, the register address and value are combined into a single U32 value.<br></P>
47<P>BP has its own unique register address space.</P>
48
49<H2>Revision History</H2>
50<P>
512006/03/01 Initial version.<br>
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54<hr><p>CONFIDENTIAL</p></body>
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