TVP4020
Programmers Reference Manual
Graphics Register Reference
255
6
RGB
3:3:2 Back
3@13
3@10
2@8
0
9
RGB
2:3:2:1 Front
2@5
3@2
2@0
1@7
10
RGB
2:3:2:1 Back
2@13
3@10
2@8
1@15
11
RGB
2:3:2 FrontOff
2@5
3@2
2@0
0
12
RGB
2:3:2 BackOff
2@13
3@10
2@8
0
13
RGB
5:5:5:1 Back
5@26
5@21
5@16
1@31
14
RGB
CI8
8@0
0
0
0
15
RGB
CI4
4@0
0
0
0
16
RGB
5:6:5 Front
5@11
6@5
5@0
0
17
RGB
5:6:5 Back
5@27
6@21
5@16
0
18
RGB
YUV444
8@16
8@8
8@0
8@24
19
RGB
YUV422
8@8
8@0
8@0
0
Notes: The format column is also dependent on bit6. n@m means n bits starting at bit m.
Front and Back modes replicate the color value to assist with double buffering. CI values
are replicated into each byte to assist with double buffering. Offset modes have 64 added
to the 7 bit formatted value. If the format has no alpha bits, the alpha field defaults to 0xF8
Bit4
No Alpha Buffer:
0 = Alpha buffer present
1 = Alpha buffer not present
Bit5
Color Order:
0 = BGR
1 = RGB
Bit6
Texture Format Extension. Most significant bit extension to Texture
Format held in bits0-3
Bit7-8
AlphaMap:
0 = None
1 = Include: pass texels that lie within the AlphaMap bounds
2 = Exclude: fail texels that lie within the AlphaMap bounds
Bit9
SpanFormat: used to control the data format of a texture map holding
block fill masks.
0 = Normal
1 = Flip: mirror the bits within each byte
Summary of Contents for TVP4020 PERMEDIA 2
Page 1: ...Texas Instruments TVP4020 PERMEDIA 2 Programmer s Reference Manual Issue 4 ...
Page 284: ...TVP4020 Programmers Reference Manual A Gouraud Shaded Triangle 275 ...
Page 292: ...TVP4020 Programmers Reference Manual Register Tables 283 ...
Page 314: ...TVP4020 Programmers Reference Manual Index 305 ...
Page 315: ...Index TVP4020 Programmers Reference Manual 306 Index ...
Page 323: ...Index TVP4020 Programmers Reference Manual 314 ...