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82375EB Datasheet(PDF) 87 Page - Intel Corporation

Part # 82375EB
Description  PCI-EISA BRIDGE (PCEB)
PDF  131 Pages
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

82375EB Datasheet(HTML) 87 Page - Intel Corporation

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82375EBSB
This register defaults to 04h at reset This selects fixed mode
4 with the CPU the highest priority device
guaranteeing that BIOS accesses can take place
ARBPRIX Register
Bit
Description
7
Bank 3 Fixed Priority Mode select
60
Reserved
This register defaults to 00h at reset The default value selects REQ1
as a higher priority request than
REQ2
when Bank 3 operates in the fixed priority mode
5411 Fixed Priority Mode
The twelve selectable fixed priority schemes are listed in Table 6
Table 6 Fixed Priority Mode Bank Control Bits
Mode
Bank
Priority
3
2b
2a
1
0
Highest
Lowest
0
0
0
0
0
0
PCEBREQ
REQ0
REQ1
CPUREQ
REQ3
REQ2
1
0
0
0
0
1
REQ0
PCEBREQ
REQ1
CPUREQ
REQ3
REQ2
2
0
0
0
1
0
PCEBREQ
REQ0
REQ1
REQ3
CPUREQ
REQ2
3
0
0
0
1
1
REQ0
PCEBREQ
REQ1
REQ3
CPUREQ
REQ2
4
0
0
1
0
0
CPUREQ
REQ3
PCEBREQ
REQ0
REQ1
REQ2
5
0
0
1
0
1
CPUREQ
REQ3
REQ0
PCEBREQ
REQ1
REQ2
6
0
0
1
1
0
REQ3
CPUREQ
PCEBREQ
REQ0
REQ1
REQ2
7
0
0
1
1
1
REQ3
CPUREQ
REQ0
PCEBREQ
REQ1
REQ2
8
0
1
0
0
0
REQ1
CPUREQ
REQ3
PCEBREQ
REQ0
REQ2
9
0
1
0
0
1
REQ1
CPUREQ
REQ3
REQ0
PCEBREQ
REQ2
A
0
1
0
1
0
REQ1
REQ3
CPUREQ
PCEBREQ
REQ0
REQ2
B
0
1
0
1
1
REQ1
REQ3
CPUREQ
REQ0
PCEBREQ
REQ2
87



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