Intel AP440FX Graphics Subsystem, Real-Time Clock, Cmos RAM and Battery, Infrared Support

AP440FX Motherboard Technical Product Specification

∙<CTRL> <ALT> <defined in Setup>: Power down and coffee-break key sequences take advantage of the SMM features of the Pentium Pro processor to greatly reduce the computer’s power consumption while maintaining the responsiveness necessary to service external interrupts.

∙<CTRL> <ALT> <defined in Setup>: Keyboard secure hot keys lock the keyboard until user specified password is given.

1.8.3Real-Time Clock, CMOS RAM and Battery

The integrated real-time clock is compatible with DS1287 and MC146818 components. It provides a time of day clock, a 100-year calendar with alarm features, and a century register. The real-time clock can be set in the Setup program. The real-time clock also supports 242-byte battery-backed CMOS RAM in two banks which is reserved for BIOS use. The CMOS RAM can be set to specific values or cleared to the default values using the Setup program. Also, the CMOS RAM values can be cleared to the defaults by using a configuration jumper on the motherboard.

An external coin-cell style battery provides power to the real-time clock and CMOS memory. The battery used is a long-life version that is socketed for easy replacement. When the computer is on, the life of the battery is extended by a trickle current from the power supply.

1.8.4Infrared Support

A 5-pin interface on the front panel I/O connector allows connection to a Hewlett Packard† HSDL- 1000 compatible infrared (IrDA) transmitter/receiver. Once the module is connected to the front panel I/O header, Serial port 2 can be redirected to the IrDA module. When configured for IrDA, the user can transfer files to or from portable devices such as laptops, PDAs and printers using application software such as LapLink†. The IrDA specification provides for data transfers at 115kbps from a distance of 1 meter. Support for Consumer Infrared (ASK-IR and DASK-IR options for SHARP-IR) is also included. Consumer infrared is supported at both slow and medium speeds.

1.8.5Parallel Port

A 25-pin D-Sub header is provided on the back panel for a multi-mode bi-directional parallel port. The parallel port operates in standard mode, Enhanced Parallel Port (EPP) version 1.7 mode, with BIOS and Driver support, and a high speed Extended Capabilities Port (ECP) compatible mode.

EPP Mode requires a driver provided by the peripheral manufacturer to operate correctly.

1.9 Graphics Subsystem

The AP440FX motherboard is available with a factory option of an S3 ViRGE† or ViRGE/DX SVGA graphics controller. Both options are supported by 2 MB of 50 ns EDO SOJ DRAM soldered to the motherboard. The AP440FX motherboard also supports the S3 media channel, also known as the Local Peripheral Bus (LBP) or Scenic Highway.

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