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448 AMD Geode™ LX Processors Data Book
Video Processor Register Descriptions
33234H
6.8.3.36 Alpha Watch (AWT)
Alpha values may be automatically incremented/decremented for successive frames. This register can be used to read
alpha values that are being used in the current frame.
6.8.3.37 Video Processor Test Mode (VTM)
VP Memory Offset 128h
Typ e RO
Reset Value 00000000_00000000h
AWT Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
313029282726252423222120191817161514131211109876543210
RSVD AW3 AW2 AW1
AWT Bit Descriptions
Bit Name Description
63:24 RSVD Reserved. Reads back as 0.
23:16 AW3 Alpha Value for Window 3.
15:8 AW2 Alpha Value for Window 2.
7:0 AW1 Alpha Value for Window 1.
VP Memory Offset 130h
Typ e R /W
Reset Value 00000000_00000000h
VTM Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
313029282726252423222120191817161514131211109876543210
SP RSVD SP RSVD RSVD RSVD
VTM Bit Descriptions
Bit Name Description
63:32 RSVD (RO) Reserved (Read Only). Reads back as 0.
31 SP Spare. Read/write; no function.
30:11 RSVD (RO) Reserved (Read Only). Reads back as 0.
10:9 SP Spares. Read/write; no function.
8:7 RSVD (RO) Reserved (Read Only). Reads back as 0.
6 RSVD Reserved. Reserved for test purposes.
5:4 RSVD (RO) Reserved (Read Only). Reads back as 0.
3:0 RSVD Reserved. Reserved for test purposes.