NEC ES1200 User Manual page 22

2-6
Pentium II Processor
Syst em Memory
I/O Expansion Slots
Real- Time Clock/Calendar
Features
The system includes a Pentium II processor plugged
into a socket on the system board (Figure 2-3, F). The
board also contains a voltage regulator to power this
processor (Figure 2-3, E). The processor features a 512
KB cache. ECC generation/checking is provided for
detection and correction of cache errors.
The system board contains four 168-pin DIMM sockets
(Figure 2-3, I). The minimum system board
configuration includes 32 MB of system memory. 4
DIMM sockets allow for system memory expansion to
512 MB. ECC generation/checking is provided for
detection and correction of memory errors.
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 offers four dedicated PCI
slots and two dedicated ISA slots.
The system board contains two ISA I/O (input/output)
expansion slots (Figure 2-3, A). The ISA architecture
supports 16-bit memory addressing and 16-bit data
transfers.
The system board also contains four PCI bus I/O
expansion slots (Figure 2-3, C). The PCI architecture
supports 32-bit memory addressing and 32-bit data
transfers.
The real-time clock provides system clock/calendar
information stored in a non-volatile memory (NVRAM).
The real-time clock battery (Figure 2-3, R) provides
power backup for the real-time clock.