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TS-3200 User's Manual
Technologic Systems
}
return –1;
}
For more information, please see Intel's 386EX manual, chapter 17, for more information.
11 LED
The TS-3200 has a green LED available for user software. Example uses include diagnostics, status
messages, and simple output. This signal is also available as a digital output on the DIO2 header.
When power is first supplied to the TS-3200, the board mounted LED is immediately turned on under
hardware control. Once the processor begins execution, the LED is turned off, then flashed on and off
again briefly. If the LED does not turn on at all, the most likely problem is the power supply. Check that
the +5V and GND connections are not reversed. A diode protects the board against damage in such a
situation, but it will not run.
BIOS interrupt functions are used to turn the LED on and off. Please see Appendix D for further details
and the utility disk for example code.
14
05/21/2009
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