
Turbo Switch Connector
The Turbo switch (TURBO) is a 2-pin BERG strip. It is used to
connect the front panel 2-position push switch to the system
board speed switching circuitry. The Turbo mode is set as
default on the 486PH.
Function
TURBO
Enable TURBO Mode (Default)
Short
Disable TURBO Mode
Open
Turbo LED Connector
The Turbo LED connector (TBLED) is a 2-pin BERG strip. It is
used to connect a CPU operating frequency indicator LED from
the front panel to the system board. The pin assignments are
indicated below:
Pin
Description
1
LED Cathode ( - )
2
LED Anode (+)
Hard Disk Activity LED Connector
The hard disk activity LED connector (label as HDLED) is a 2-
pin keyed BERG strip. The LED will be on whenever there is
data transfer activity on on-board IDE bus. The connector
should be connected to the case’s front panel hard disk LED.
Pin
Description
1
LED Anode (+)
2
LED Cathode (-)
Содержание 486PH
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