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RIVA128ZX Datasheet(PDF) 16 Page - STMicroelectronics

Part # RIVA128ZX
Description  128-BIT 3D MULTIMEDIA ACCELERATOR
PDF  85 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RIVA128ZX Datasheet(HTML) 16 Page - STMicroelectronics

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128-BIT 3D MULTIMEDIA ACCELERATOR
RIVA128ZX
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Figure 3.
Basic PCI transaction on AGP
An example of a PCI transaction occurring between an AGP command cycle and return of data is shown
in Figure 4. This shows the smallest number of cycles during which an AGP request can be enqueued, a
PCI transaction performed and AGP read data returned.
Figure 4.
PCI transaction occurring between AGP request and data
bus cmd
data_pci
address
BE[3:0]#
111
111
xxx
xxx
xxx
xxx
PCICLK
PCIFRAME#
PCIAD[31:0]
PCICBE[3:0]#
PCIIRDY#
PCITRDY#
PCIDEVSEL#
PCIREQ#
PCIGNT#
AGPST[2:0]
13
4
5
6
2
A9
111
xxx
111
111
xxx
111
address
data
D7
+1
C9
pci_cmd
BE
0000
000
xxx
00x
xxx
xxx
PCICLK
AGPPIPE#
PCIFRAME#
PCIAD[31:0]
PCICBE#
PCIIRDY#
PCITRDY#
PCIDEVSEL#
PCIAGPRBF#
PCIREQ#
PCIGNT#
AGPST[2:0]
1
2
34
5
678
9
10



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