Pentium P55-IT, Руководство пользователя

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2-4 P55-IT
JP7 JP9 CLOCK Chip Frequency.
2-3 2-3 x ( 1.5 ) (Default)
1-2 2-3 x ( 2 )
2-3 1-2 x ( 3 )
1-2 1-2 x ( 2.5 )
2-3 System Memory Configuration
The P55-IT supports different type of settings for the system memory. There is no
jumper nor connector needed for memory configuration. Following figures provides
all possible memory cominations.
Clock/CPU Op. JPS1 JPS2 JP7 JP9 J25
JP9
Clock chip is IMI
SC484
66/166 MHz CLOSE CLOSE 1-2 1-2 2-3
60/120 MHz CLOSE OPEN 1-2 2-3 2-3
1 2 3
1 2 3
J25
System AT BUS CLOCK Select:
1-2 ATCLK is devided PCICLK * by 3.
2-3 ATCLK is devided PCICLK * by 4.(Default)
* CPU OP. is CPU operation at 75, 90, 100 MHz, etc.
* Clock is System Clock.
* PCICLK = System Clock / 2
50/75 MHz OPEN OPEN 2-3 2-3 1-2
If system is operating at 66/100 MHz, than PCICLK is 33Mhz.
* The JP7 and JP9 be used to setting the faster Pentium Processor in the feature.
JPS1
JPS2
66/100 MHz CLOSE CLOSE 2-3 2-3 2-3
JP7
60/90 MHz CLOSE OPEN 2-3 2-3 2-3
60/150 MHz CLOSE OPEN 1-2 1-2 2-3
66/133 MHz CLOSE CLOSE 1-2 2-3 2-3
J25
1 2 3