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Product Description 1-19
1.8.3 Processor Board
Prior to the 4150 model, there are two processor board PCAs with either 8-MB or 16-MB of
memory and with a level-2 cache populating the models with 100-, 120- and 133-MHz
processors. The MMX processor on the 4150 , 4150T, and 4160T are P55CLM processors
operating at 150 or 166 MHz. These processors are not compatible with 4131T, 4130T,
4120T, 4120, 4110, and 4100 models.
In each of the 4100 and 4200 systems there are two processor board PCAs with a level-
2 cache. The processor board contains the CPU, the OPTi 82C557 system Controller,
the OPTi 82C556 data buffer controller, and, if populated on the PCB, cache data
RAM. Also mounted on the processor board is an electronic temperature sensor that
interfaces to the system through the I
2
C bus.
The 4210T and 4220T processor boards include the 233- and 266-MHz MMX
processors and the MTXC controller, part of the Intel 430TX mobile chipset. The 4200
Family processor boards also include the electronic sensor that interfaces to the system
through the I
2
C bus.
1.8.4 Processor
The P54LM and the P55CLM Intel Pentium processors are fully compatible with the entire
installed base of applications for DOS, Windows, and OS/2, branch predition, and separate
code and data caches all provide increased performance over previous x86 processors.
Reduced voltage operation and enhanced SL power management features provide significant
power savings over other Pentium versions.
For the 4200 Family, the 233 MHz CPU core runs on a 1.8 V supply. The 266 MHz CPU core
runs on a 2.0 V supply. The interface for the 4200 Family is 2.5 V to 3.3 V.
For the 4100 Family, the CPU core runs on a 2.9V supply for lower power operation, while
the I/O buffers are powered at 3.3V for compatibility with the rest of the system.
1.8.5 System Memory
See Tables 1-1 and 1-2 for the system memory contained on models for the 4100 and
4200 Families. Up to 96-MB of expansion memory is available. Base memory is
onboard memory built into the system I/O board. Expansion memory consists of
memory expansion board kits available as user installable options.
1.8.6 Cache
The 4200 Family models have 256-KB or 512-KB of cache data RAM and 64-KB of
cache tag RAM if populated on the PCB are mounted on the processor module.
The 4110-4160T models have 256-KB of cache data RAM and 32-KB of cache tag
RAM if populated on the PCB are mounted on the processor module.