American Megatrends Atlas PCI-II User Manual page 11

Overview,
Continued
Mouse The Atlantis motherboard includes a standard miniDIN mouse connector.
USB The Atlantis motherboard has two 4-pin USB connectors. USB allows future
generations of USB-compliant peripheral devices to be automatically detected
and configured through a single port. USB uses Plug and Play technology. All
USB peripherals are automatically detected and configured. The AMIBIOS
on this motherboard provides complete USB system BIOS support.
Power Connectors The Atlantis motherboard has standard ATX power supply connectors.
RTC/CMOS RAM A real time clock and 128 bytes of CMOS RAM with a battery backup is
provided on the motherboard.
Power Management Power management services include:
power management signal to Green PC-aware power supplies,
automatic IDE and video power down,
monitor blanking,
SMI (System Management Interrupt) support,
APM, and
system stop clock.
PCI Slots The motherboard conforms to the PCI Version 2.1 specification. The
concurrent PCI architecture of this motherboard allows faster CPU, PCI, and
ISA bus transactions for faster and smoother multimedia performance. This
motherboard allows you to install either PCI V2.0 or PCI V2.1-comaptible
adapter cards
The five PCI slots are automatically configured by the AMIBIOS. The PCI
slots operate synchronously with the CPU clock, as follows:
CPU External Clock Frequency
66 MHz
60 MHz
Onboard I/O The Atlantis Pentium II ISA motherboard includes:
two 40-pin IDE connectors on the PCI bus that support up to four IDE
drives,
a 34-pin floppy drive connector,
two DB9 serial port connectors (with 16550 UARTs),
a DB25 parallel port connector with ECP and EPP support,
an infrared connector,
two USB connectors that permit high speed USB-compliant external
peripheral devices,
a PS/2 keyboard connector, and
a PS/2 mouse connector.
Chapter 1 Hardware Installation
PCI Expansion Slot Frequency
33 MHz
30 MHz
Cont'd
7