ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 373

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Display Controller Register Descriptions
6.6.20.5 VGA Color Compare
Index
Type
Reset Value
Bits [3:0] specify a compare value that allows the CPU to compare pixels in planar modes. Read mode 1 performs a com-
parison based on these bits combined with the Color Don’t Care bits. Data returned will contain a 1 in each one of the eight
pixel positions where a color match is found. See the description of read modes (Section 6.5.5.4 on page 289) for more
information.
6.6.20.6 VGA Data Rotate
Index
Type
Reset Value
AMD Geode™ LX Processors Data Book
Bit
7:4
Bit
7:5
4:3
2:0
3
2
1
0
Name
RSVD
CO_CM_MP3
CO_CM_MP2
CO_CM_MP1
CO_CM_MP0
Name
RSVD
WROP
ROTCNT
02h
R/W
xxh
03h
R/W
xxh
VGA Data Rotate Bit Descriptions Bit Descriptions
Description
Reserved.
Color Compare Map 3.
Color Compare Map 2.
Color Compare Map 1.
Color Compare Map 0.
Description
Reserved.
Write Operation. Data written to the frame buffer by the CPU can be logically combined
with data already in the CPU data latches.
00: Copy (CPU data written unmodified).
01: CPU data ANDed with latched data.
10: CPU data ORed with latched data.
11: CPU data XORed with latched data.
See the description of write modes (Section 6.5.5.3 on page 288) for more information.
Rotate Count. This value is used to rotate the CPU data before it is used in write modes
0 and 3. The CPU data byte written is rotated right, with low bits wrapping to the high bit
positions. See the description of write modes (Section 6.5.5.3 on page 288) for more
information.
VGA Color Compare Register Bit Descriptions
33234C
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