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Apollo IV PCI Pentium ISA Motherboard User’s Guide
6
Overview, Continued
Mouse The Apollo IV motherboard includes a 5-pin berg mouse connector.
USB The Apollo IV 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 Apollo IV motherboard has three 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:
• Green PC LED,
• 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 PCI slots are automatically configured by the AMIBIOS. The PCI slots
operate synchronously with the CPU clock, as follows:
CPU External Clock Frequency PCI Expansion Slot Frequency
66 MHz 33 MHz
60 MHz 30 MHz
Onboard I/O The Apollo IV Pentium 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 10-pin serial port connectors (with 16550 UARTs),
• a 26-pin parallel port connector with ECP and EPP support,
• an infrared connector,
• two USB connectors that support an optional riser card that permit high
speed Plug and Play connection to USB-compliant external peripheral
devices,
• a keyboard connector, and
• a PS/2 mouse connector.
Cont’d