ALXD800EEXJ2VC C3 AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VC C3 Datasheet - Page 244
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ALXD800EEXJ2VC C3
Manufacturer Part Number
ALXD800EEXJ2VC C3
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.ALXD800EEXJ2VC_C3.pdf
(680 pages)
Specifications of ALXD800EEXJ2VC C3
Operating Temperature (min)
0C
Operating Temperature (max)
85C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Not Compliant
- Current page: 244 of 680
- Download datasheet (6Mb)
6.3.2.5
Channel 3 can be setup to fetch 4-bpp alpha channel data
that can be combined with either 16 or 32-bpp color or
monochrome source data using the alpha unit in the GP.
The depth and type in the GP_CH3_MODE_STR register
should be setup to indicate 4-bpp alpha and the AS bits in
the GP_RASTER_MODE register (GP Memory Offset
38h[19:17]) should be set to 110 to select the alpha from
channel 3.
6.3.2.6
Channel 3 can also be configured to source full color pat-
terns into the GP. The pattern data is stored in the 2K
buffer
GP_LUT_DATA registers (GP Memory Offset 70h and
74h, respectively) as done for loading the LUT. Addresses
100h-10Fh are used for 8-bpp patterns, 100h-11Fh are
used for 16-bpp patterns and 100h-13Fh are used for 32-
bpp patterns. Note that this data will not be persistent in the
buffer. If channel 3 is later used in non-pattern mode, then
the pattern data will no longer be present in the buffer.
Therefore it is usually necessary to reload the pattern data
before any BLT requiring 8x8 color pattern support. The
depth of the pattern is determined by the BPP/FMT bits
(GP
GP_CH3_MODE_STR register (4-bpp is not allowed in
244
31
31
0
0
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
0
0
using
Memory
0
0
Anti-Aliased Text Support
8x8 Color Pattern
0
0
writes
0
0
0
0
Offset
33234H
0
0
to
0
0
the
0
0
64h[27:24])
GP_LUT_INDEX
0
0
Figure 6-11. 14-Bit Repeated Pattern
0
0
Table 6-14. Example Vector Pattern
Table 6-15. Example Vector Length
0
0
0
0
of
0
0
0
0
and
the
0
0
0
0
pattern mode). The output of the pattern hardware is con-
verted to the depth specified in the BPP/FMT GP bits
(Memory Offset 38h[31:28]) of the GP_RASTER_MODE
register if the two depths do not match.
6.3.2.7
When pattern mode is enabled during a vector operation,
channel 3 generates a patterned (stippled) vector. This is a
linear monochrome pattern that is stored in the LUT at
locations 100h and 101h. The first DWORD (100h) con-
tains the pattern, which is a string of four to 32 bits starting
at bit 0. The second DWORD is used to indicate the length
of the pattern and is a string of four to 32 ones starting at
bit 0. Tables 6-14 and 6-15 show an example vector pattern
and length. The result of this vector pattern/length would be
a 14-bit long pattern that, when repeated, looks Figure 6-
11.
The dark pixels are rendered using the selected ROP,
while the light pixels are transparent. The ROP may con-
tain any combination of source, destination and pattern. If
pattern is enabled in the ROP, it comes from the old (non-
channel 3) pattern hardware. Note that a vector pattern
must be at least four pixels long. For shorter patterns (i.e.,
two on, one off), repeat the pattern in the pattern registers
until it is at least four pixels long.
0
0
0
1
Patterned Vectors
0
1
1
1
1
1
AMD Geode™ LX Processors Data Book
9
0
9
1
8
0
8
1
7
1
7
1
6
1
6
1
5
0
5
1
Graphics Processor
4
0
4
1
3
1
3
1
2
1
2
1
1
1
1
1
0
1
0
1
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