The first one was a nice 486 PCI board, powered by a SiS chipset. Unfortunately, none of them protect your precious historic hardware if something goes wrong.īut let’s go back to my old motherboards. That’s better because if something goes wrong, the current from the PSU can be stopped much faster. Other adapters come with a (usually bulky) switch to trigger the PWR_ON signal. To power on/off the whole platform, you must use the main switch. As soon as you plug the adapter, no matter what’s connected or not, it will start the ATX PSU. Two kinds of ATX to AT adapters are available on the market for a few bucks: the cheapest ones have a built-in strap to ground the PWR_ON signal. Also note that the converter is powered with the 5VSB (Standby) signal from the ATX PSU, so it works even if the PSU is not started. Even the PWR_GOOD signal is current-limited to prevent damage to the ATX2AT Converter in case of failure. Of course, you also have a push button to cycle the power (a header is also available for an external button) and a status LED.
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