NEC ES1400, Руководство пользователя, Страница: 21 / 188

System Overview 1-7
Pentium II Processor
The system board includes a Pentium II processor packaged in a Single
Edge Contact (S.E.C.) cartridge. The cartridge includes the processor
core with an integrated 16 KB primary (L1) cache; the secondary (L2)
cache; a thermal plate; and a back cover. The processor implements the
MMX
™
technology and the processor’s numeric coprocessor significantly
increases the speed of floating-point operations.
The processor external interface operates at 100 MHz. The second-level
cache is located on the substrate of the S.E.C. cartridge. The cache
includes burst pipelined synchronous static RAM (BSRAM). The L2
cache is offered in 512 KB configurations only, with error correcting
code (ECC) that operates at half the core clock rate.
System Memory
The system board contains three 168-pin DIMM sockets. Memory is
partitioned as three banks of SDRAM DIMMs, each providing 72 bits of
noninterleaved memory (64-bit main memory plus ECC). Your system
may include from 32 MB to 768 MB of memory, using up to four
DIMMs.
System memory begins at address 0 and is continuous (flat addressing)
up to the maximum amount of DRAM installed (exception: system
memory is noncontiguous in the ranges defined as memory holes using
configuration registers). The system supports both base (conventional)
and extended memory.
I/O Expansion Slots
The server's expansion capabilities meet the needs of file and
application servers for high performance I/O by providing a
combination of PCI local bus and ISA connectors.
The system board has two full-length ISA bus connectors. One of the
connectors shares a chassis expansion slot with a PCI connector. ISA
features:
„
Bus speed up to 8.33 MHz
„
16-bit memory addressing
„
8- or 16-bit data transfers
„
Plug and Play ready.