Updated: Monday, August 26, 1996

Contents

• Motherboard Connectors
• Front Panel Connections
• Back Panel Connections

Motherboard Connectors
There are connectors on-board for Floppy, IDE, SIMMs, battery holder and front panel I/O connectors.

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

Front panel features supported include:

• System Speaker
• Infra-Red (IrDA) port
• Sleep/Resume
• Hard Drive activity LED
• Power LED
• System Reset
• CPU fan

• Speaker
  The external speaker provides error beep code information during the Power-on Self Test, if the system cannot use the video interface.

  Speaker Connector Pinout
  Pin	Signal Name
  26	SPKR_DAT
  27	SPKR_DAT
  28 	Key
  29	Ground
  

• Infra-red (IrDA) connector
  Serial port 2 can be configured to support an IrDA module via a 5 pin header connector. Once configured for IrDA, the user can transfer files to or from portable devices such as laptops, PDA’s and printers using application software such as LapLink. The IrDA specification provides for data transfers at 115 Kbps from a distance of 1 meter.

  Infrared Connector Pinout
  Pin	Signal Name
  20	+5 V
  21	no connect
  22	IRRX
  23	Ground
  24	IRTX
  25	no connect
  

• Sleep / Resume
  When Advanced Power Management (APM) is activated in the system BIOS and the Operating System’s APM driver is loaded, Sleep mode (Stand-by) can be entered in one of three ways: an optional front panel "Sleep/Resume" button, a user defined keyboard hot key, or prolonged system inactivity. The Sleep/Resume button is supported by a 2-pin header located on the front panel I/O connector. Closing the "Sleep" switch will generate an SMI (System Management Interrupt) to the processor which immediately goes into System Management Mode (SMM), the so called "Sleep" mode. The front panel "Sleep mode" switch must be a momentary two pin SPST type that is normally open. The function of the Sleep/Resume button can also be achieved via a keyboard hot-key sequence, or by a time-out of the system inactivity timer. Both the keyboard hot-key and the inactivity timer are programmable in the BIOS setup (timer is set to 10 minutes by default). To re-activate the system, or "Resume", the user must simply press the sleep/resume button again, or use the keyboard or mouse. Mouse activity will only "wake up" the system if a mouse driver is loaded. While the system is in Stand-by or "sleep" mode it is fully capable of responding to and servicing external interrupts (such as in-coming FAX) even though the monitor will only turn on if a user interrupt (keyboard/mouse) occurs as mentioned above.

  Sleep/Power Connector Pinout
  Pin	Signal Name
  15	SW_ON*
  16	Ground
  17	COMATOSE *
  18	+5 V
  

• Hard Drive Activity LED

  Hard Drive LED Connector Pinout
  Pin	Signal Name
  11	+5 V
  12	HDA*
  13	PWR_LED_DRV
  14	+5 V
  

• Power LED

  Power LED Connector Pinout
  Pin	Signal Name
  7	+5 V
  8	+5 V
  9	PWR_LED_DRV
  10	PWR_LED_DRV
  

• Reset
  This 2-pin header can be connected to a momentary SPST type switch that is normally open. When the switch is closed, the system will hard reset and run POST.

  Reset Connector Pinout
  Pin	Signal Name
  4	Ground
  5	SW_RST
  

• CPU fan

  CPU Fan Connector Pinout
  Pin	Signal Name
  1	Ground
  2	+12 V
  3	Ground
  

Back Panel Connections
The back panel provides external access to PS/2-style keyboard and mouse connectors as well as two serial ports and one parallel port, which are integrated on the Advanced/ML baseboard. The diagram below shows the general locations.

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