Updated: Tuesday, March 25, 1997

Contents

• Motherboard Connectors
• Front Panel Connections
• Audio Connectors
• Back Panel Connections

Motherboard Connectors

Power Connectors
The Advanced/RH motherboard can be used with a power supply that supports remote power on/off, so the motherboard can turn off the system power under software control. The Powerman utility supplied for Windows 3.1x allows for soft-off as does the shutdown icon in Windows 95 Start menu. The system BIOS turns the system power off when it receives the proper APM command from the OS. For example, Windows 95 issues this APM command after the user selects "Shutdown the computer" option. APM must be enabled in the system BIOS and OS in order for the soft-off feature to work correctly. The user has the ability to determine the state of the power supply, so if the system was turned on when power was disconnected, the system turns back on when power is reapplied or it remains off, depending on the user setup configuration in CMOS.

Front Panel Connections (J3A1, J2A1)
The Advanced/RH motherboard provides header connectors to support functions typically located on the chassis bezel.

Front panel features supported include:

• System Speaker (SPKR)
• Infrared (IrDA) port (IR)
• Sleep/Resume (SLP)
• Power supply ON (PS-ON)
• Hard Drive activity LED (HDDLED)
• Power LED (PWRLED)
• System Reset (RST)
• CPU fan (FAN)

• Speaker
  A speaker may be installed on the motherboard as a manufacturing option. The speaker provides error beep code information during the Power-On Self Test (POST) if the computer cannot use the video interface. The speaker is not connected to the audio subsystem, and does not receive output from the audio subsystem.

• Infrared (IRDa) Connector
  Serial Port 2 can be configured to support an IrDA module connected to this 6-pin header. After configuring the IrDA interface, you can transfer files to or from portable devices such as laptops, PDAs and printers using application software.

• Sleep / Resume
  When advanced power management (APM) is enabled in the system BIOS and the operating system’s APM driver is loaded, the system can enter Sleep (Standby) mode in one of three ways:
  • Optional front panel Sleep/Resume button
  • Hot key defined in the BIOS Setup program
  • Prolonged system inactivity; the default timeout is 10 minutes and can be changed in Setup
  A Sleep/Resume button is supported by the 2-pin header located on the front panel I/O connector. The front panel Sleep/Resume switch must be a momentary SPST type that is normally open.

  Closing the Sleep/Resume switch generates a System Management Interrupt (SMI) to the processor, which immediately goes into System Management Mode (SMM). While the system is in Sleep mode it is fully capable of responding to and servicing external interrupts (such as an incoming fax) even though the monitor turns on only if a keyboard or mouse interrupt occurs. To reactivate the system, or Resume, you must press the Sleep/Resume button again, or use the keyboard or mouse.

• Power supply ON
  To support soft off connect this header to a power switch which could be placed on the front panel. A momentary ground must be applied to the PS_ON pin to signal the supply to turn on or off. This requirement would normally be satisfied by using a SPST normally open momentary contact switch. Because of the motherboard’s internal debounce circuitry, the ground must be applied for at least 50 ms. To prevent double-clicking, at least two seconds must pass before the power supply will recognize another on/off signal.

• Hard drive activity LED
  Connect this header to an LED to provide a visual indicator that data is being read from or written to an IDE hard drive. For the LED to function properly, the IDE drive must be connected to the onboard IDE controller on the motherboard.

• Reset
  Connect this header to a momentary SPST type switch that is normally open. When the switch is closed, the board resets and runs the POST.

• Sleep / Power LED
  Connect this header to an LED that will light when the computer is powered on. This LED will also blink when the computer is in a power-managed state.

• CPU Fan
  The 3-pin fan header of the front panel connector provides a basic 3-wire connection to a CPU fan. The center pin of the header supplies +12 VDC and the outer pins are at ground.

Audio Connectors
For business audio features, audio is accessed using audio jacks provided on the motherboard. These two 1/8" jacks supply Line Out, and Mic In connections and are available through the back I/O panel.

CD-ROM Audio Input
A four pin connector is provided for interfacing the audio output stream from a CD-ROM reader into the audio sub-system mixer. This connector is compatible with the typical cable that is supplied with CD-ROM readers for interfacing to audio add-in cards.

Locations for wavetable, telephony, and MIDI/audio upgrades are not used on standard configurations of the Advanced/RH.

Back Panel Connections
The figure below shows the location of the back panel I/O connectors, which include:

• VGA monitor connector
• One parallel port
• One or optionally two serial ports (both options shown below)
• Two optional USB connectors (option shown below)
• PS/2-style keyboard and mouse connectors
• Optional external audio jacks: Line Out and Mic In

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