The only way to do this, as someone suggested, would be to physically disconnect your reset switch from the motherboard and run that to a serial interface with a custom program monitoring it. When connected to the motherboard, the reset switch lowers the POWER GOOD signal, which is set high after a power check when the system is powered on. As long as POWER GOOD stays high, the system keeps running.
Slashdot Mirror
Wasn't there an old BOFH piece mocking this sort of idea?
The only way to do this, as someone suggested, would be to physically disconnect your reset switch from the motherboard and run that to a serial interface with a custom program monitoring it. When connected to the motherboard, the reset switch lowers the POWER GOOD signal, which is set high after a power check when the system is powered on. As long as POWER GOOD stays high, the system keeps running.