VOGONS


First post, by ubiq

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Had my P2B-DS system on the bench, trying out some different video cards. (Felt the Voodoo 3 I had in there was cool, but ultimately limiting what I was doing with it. My currently homeless 9700 Pro wouldn't fit on account of its chunky Zalman cooler, so I settled on a more humble Radeon 9200.)

Anyway, it's always bugged me that this machine never shuts itself off on shutdown, and gives a screen that I imagine most XP users have never seen:

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I've never been able to figure out what its issue is. Obviously I've played around in the BIOS, but there's not a whole lot there:

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I'd been running it pure Win2k for a while, but took the opportunity to switch it up to a 98/2k/XP triple boot. Almost didn't notice at first, but was mildly shocked when I realized Win98 was suddenly able to turn the system off. Win2k and XP still stop at the "safe to power off" screen.

Yeah, it's a pretty low stakes issue, but it's also such a simple one I figure I must be missing something obvious. Any ideas?

Reply 1 of 3, by andrea

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It's a known issue with P2B-DS and some other dual socket ASUS motherboards of the same vintage.
The fix is to move a resistor, update the bios and install Windows in ACPI mode (press F5 when the setup asks for F6 for SCSI driver, and then select ACPI machine type)
The resistor to move: https://web.archive.org/web/20160819073828/ht … CPI_dual-mb.htm

Reply 2 of 3, by ubiq

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Ahhhh right, it's a ACPI issue. And I've always installed 2k/XP in "MPS Multiprocessor PC" mode - which is definitely what is borking things. My understanding was that's just what was required for dual cpu systems. But I'm gathering that with the resistor fix I can install in ACPI mode and still have dual CPU support.

Hmm, other than the specific shutdown issue, any reason not to run MPS Multiprocessor mode?

Edit: my board is unfortunately just a 1.05 revision. Was also looking into potential Tualatin support and it looks like a no go unless I can get my hands on a non-counterfeit ICS 9250CF-08 chip and mod in some jumpers

Reply 3 of 3, by ubiq

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Well heck, got my board out to do the resistor swap, and:

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The R80 -> R79 swap has already been done. Looks like rework from the board's previous owner too, not factory.

Just reloaded Win2k in ACPI mode and it's perfectly fine. So, my only issue this whole time was just assuming I needed to run in MPS mode at all. 😅

Well, I guess I knew it was something silly and am happy to have got it sorted out, so thanks!