Date: Thu, 24 Jul 2008 15:17:10 +0200 From: "Julian Stacey" <jhs@berklix.org> To: hardware@freebsd.org Cc: Michael Elbel <mwe@consol.de>, Gary Jennejohn <gary.jennejohn@freenet.de> Subject: Voltages on older PCs Message-ID: <200807241317.m6ODHA80093562@fire.js.berklix.net>
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Hi hardware@ (cc Gary & Michael) Comment welcome before I return a FreeBSD-7.0 host to service, (taken away for analysis after it fell off line a few times). I've long since rebuilt world, (still 7.0-REL), & built a few needed ports/, but much reduced ports/ than before, Many less auto start processes load from local/etc/rc.d & especially, no mailman, (cos I've seen thrashing from mailman on FreeBSD before). I'd checked temps long since too, with a real probe, not BIOS, they're OK (& the normal remote site has good power & very cool ) Checked Volts last night (Yes AT style 2 adjacent 6 pin connectors): PIN COLOUR NOMINAL Slim Test P9.[4-6] Red +5 +5.14V +5~ P9.3 Green -5 +0.282V -5~ P8.[56] P9.[12] Black 0 - - P8.4 Blue -12 -11.94V 0.56 P8.3 Yellow +12 +11.9V +12.3 P8.2 Purple +5 +5.11V +5 P8.1 Grey ? +2.4V +5 Notes: P8.1: OTS book says: "Power Good" but no V. is specified. Slim: The remote server in question Test: For comparison: Open frame pentium I test cards with. I recall some old PCs needed an extra negative (-5 or -12 ?), for RAM refresh, (& another also -12 for proper RS232, though rarely if ever did PCs use more than 0/5 on cua/tty, thus not Real RS232), but that some negatives got abandoned on some m. boards as no longer needed (I think refresh requirements changed). Curious thing is these 2 boards both run, but with different low voltage pins. Can anyone cast insight ? If not, I'm inclined to shrug & return server to service (where it's largely a backup anyway, not domain critical). Thanks for any insight, Cheers, Julian -- Julian Stacey: BSDUnixLinux C Prog Admin SysEng Consult Munich www.berklix.com Mail plain ASCII text. HTML & Base64 text are spam. www.asciiribbon.org
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