This is most advantageous for remote servers, and one series of Dell server platforms with watchdog timers got a mention in 2005 in the
OpenBSD Journal.
OpenBSD/i386 has some hardware listed as officially supported:
Quote:
- AMD Elan SC520 System Controller (elansc) (G)
- ICS PCI-WDT500/501 watchdog timer (wdt) (G)
- Intel 6300ESB ICH (ichwdt) (*)
- National Semiconductor Geode SC1100 IAOC (geodesc) (*)
- Quancom PWDOG1 watchdog timer (pwdog) (G)
- VIA VT1211 (viasio) (G)
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There's no list for amd64 or sparc64.