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Motherboard
Figure 2-6 Standard settings for switches S1 (1..6) and S2 (1..6) for
Clock Setting
S2(5)
S2(6)
S1(5)
on
off
on
off
on
on
on
on
on
on
off
off
off
on
off
on
on
off
Preferable settings are printed in bold letters
Caution
!
Operating a processor at a higher frequency than the maximum permissible
frequency may result in destruction of the processor, data loss, or data
corruption.
2-18
1
2
3
1
2
3
233 MHz Pentium CPU
Jumper X34
S1(6)
ISA bus
PCI bus
clock
clock
on
8.25MHz
33MHz
on
7.50MHz
30MHz
off
8.33MHz
25MHz
on
8.25MHz
33MHz
on
7.50MHz
30MHz
off
8.33MHz
25MHz
4
5
6
6
5
4
open
CPU bus
CPU core clock
clock
(CPU internal)
66MHz
133MHz
60MHz
120MHz
50MHz
100MHz
66MHz
100/233MHz 200MHz
60MHz
90MHz
50MHz
75MHz
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01
ON
S2
OFF
ON
S1
OFF
closed
166MHz
150MHz
––––––
180MHz
150MHz
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