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Graphics Register Reference
TVP4020
Programmers Reference Manual
224
Name:
Max Region
Unit:
Host Out
Region: 0
Offset:
0x0000.8C18
Tag:
0x0183
Reset Value:
Undefined
Read/write
0
8
16
24
31
16 bit 2’s complement integer Max X
16 bit 2’s complement integer Max Y
This register has two uses:
1. During Picking it contains the maximum (X,Y) value for the pick region.
2. During Extent collection, it is set to the initial minimum (X,Y) extent, and thereafter will
be updated whenever an eligible fragment is generated which has a higher X or Y value,
with that higher value. Note eligible fragments can be either those that are written as pixels
OR those that were rasterized, but were culled from being drawn, as controlled by the
StatisticMode register.
This register is unusual in that its contents are updated by P
ERMEDIA
during rendering,
and so if read back, will not necessarily be the same as when originally stored.
MaxRegion
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 ...