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Table 9-5. Pentium
Feature
1 Mbyte power-on reset vector
FRC Mode enabled
APIC cluster ID
Reserved
Symmetric arbitration ID
Clock frequency ratios
Enable rcnt/scnt debug mode
Low power standby enable
®
Table 9-6. Pentium
Pro Processor Power-on Configuration Register APIC Cluster ID bit
APIC ID
0
1
2
3
®
Table 9-7. Pentium
Pro Processor Power-on Configuration Register Bus Frequency to
Ratio of Core Freq to Bus Freq
2
3
4
2
7/2
5/2
®
Pro Processor Power-on Configuration Register (Contd.)
Pentium
®
Pro
Processor
Active
Signals
A6#
A5#
A12#,A11#
A14#,A13#
BR0#,
BR1#,
BR2#,
BR3#,
A5#
LINT[1:0],
A20M#,
IGNNE#
N.A.
N.A.
Field
Core Frequency Ratio Bit Field
Pentium Pro
Processor
Register Bits
Read/Write
D14=1
Read
D15=1
Read
D17,D16
Read
see Table 9-1
D25,D19, D18
-
D21,D20
Read
see Table 9-3
D24, D23,D22
Read
see Table 9-4
D0
Read/Write
D26
Read/Write
D[17:16]
00
01
10
11
D[24:22]
000
001
010
011
101
111
CONFIGURATION
Default
N.A.
N.A.
N.A.
-
N.A.
N.A.
disabled
disabled
9-11
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