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RIVA128 датащи(PDF) 76 Page - STMicroelectronics

номер детали RIVA128
подробное описание детали  RIVA 128™ 128-BIT 3D MULTIMEDIA ACCELERATOR
PDF  77 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RIVA128 датащи(HTML) 76 Page - STMicroelectronics

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128-BIT 3D MULTIMEDIA ACCELERATOR
RIVA 128
76/77
Byte offsets 0x4F - 0x4C
AGP Command Register (0x4F - 0x4C = CAP_PTR + 8)
Byte offset 0xFF - 0x50
0x
0x
0x
0x
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Bits
Function
R W I
31:24
This field is set to the minimum request depth of the target as reported in its
RQ field.
R W -
23:10
Reserved
R - 0
9
SBA_ENABLE enables sideband addressing when set. The RIVA 128 does
not implement sideband addressing.
R - 0
8
AGP_ENABLE allows the RIVA 128 to act as an AGP master and initiate AGP
operations. The target must be enabled before enabling the RIVA 128
0 = disabled
1 = AGP operations enabled
R W 0
7:3
Reserved
R - 0
2:0
The DATA_RATE field must be set to 0x01 to indicate 66MHz /1x transfer
mode. This value must also be set on the target before being enabled.
R W 0x01
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Reserved = 0x00000000



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