NEC MH4500 - Manual (Page 16)

1-8 System Overview
ISA features include:
T bus speed up to 8.33 MHz
T 16-bit memory addressing
T Type A transfers at 5.33 MB/second
T Type B transfers at 8 MB/second
T 8- or 16-bit data transfers
T Plug and Play ready.
The system board has two 32-bit PCI bus segments: PCI-A and PCI-B. The
segments provide seven PCI connectors, three on PCI-A and four on PCI-B.
PCI-A supports half-length boards only and PCI-B supports full-length boards.
One of the PCI-B connectors shares a chassis expansion slot with an ISA
connector.
PCI features include:
T bus speed up to 33 MHz
T 32-bit memory addressing
T 5 V signaling environment
T burst transfers of up to 133 Mbps
T 8-, 16-, or 32-bit data transfers
T Plug and Play ready
T parity enabled.
Real-Time Clock/Calendar
The real-time clock provides system clock/calendar information stored in a non-
volatile memory (NVRAM). The replaceable real-time clock battery provides
power backup for the real-time clock.
BIOS
A BIOS and Setup Utility are located in the Flash EPROM on the system board
and include support for system setup and PCI/ISA Plug-and-Play auto-
configuration. A number of security, reliability, and management features also
have been incorporated to meet vital server needs.
IDE Controller
The system includes a single channel enhanced IDE interface controller. The
controller has a primary connector located on the system board that supports a
master and a slave device.