And it's got a beeper and a Dallas realtime clock...pic.twitter.com/L0lbmicYxH
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Has to be power control, right? The card needs to be able to turn the server on and off after all. Maybe also more standby power. I don't know about that era, but these days the BMC (generic term) also *is* the video card, so that could run over PCI. But no VGA out so maybe not.
There's a 9-pin IDC connector too, which could be for a serial port bracket for the iDRAC itself, *or* to loop back to the server's own serial port. The latter would make a lot of sense.
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I can't find the manual PDF, but there's a cache: https://webcache.googleusercontent.com/search?q=cache:_bzhyQVieFoJ:https://cs.uwaterloo.ca/~brecht/servers/docs/PowerEdge-2600/en/Drac/dra24bk1.pdf+&cd=1&hl=en&ct=clnk&gl=jp#19 … Looks like it takes standby power from an external power adaptor! And it's optional but if not present, it can only run for a while on battery.
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It seems they call the extra mobo connector the "ESM" connector, and it sounds like it's mostly an interface to another micro on the motherboard that fans out to whatever they need to control. So if I had to guess it's some serial/i2c/spi or someting interface to it?
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