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Graphics Register Reference
TVP4020
Programmers Reference Manual
168
Name:
Initial Alpha Color
Unit:
Color DDA
Region: 0
Offset:
0x0000.87C8
Tag:
0x00F9
Reset Value:
Undefined
Read/write
0
8
16
24
31
Integer
Not used
Fraction
Not used
Sign
This register is used to set the initial value for the Alpha for a vertex when in Gouraud
shading mode. The value is 2's complement 9.11 fixed point format.
Name:
Bit Mask Pattern
Unit:
Rasterizer
Region: 0
Offset:
0x0000.8068
Tag:
0x000D
Reset Value:
Undefined
Write only
0
8
16
24
31
32 bit mask
Value used to control the bit mask stipple operation (if enabled). Fragments are accepted
or rejected based on the current BitMask test modes defined by the RasterizerMode
register. Note that the SyncOnBitmask bit in the Render command must also be enabled.
AStart
BitMaskPattern
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 ...