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DFI K6XV3+ will not POST with Intel CPU and IDE connected but will with AMD

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First post, by TandySensation

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I'm trying to use an Intel P54c with a DFI K6XV3+ Rev A.

The system works perfectly with a AMD K6-200 and K6-2-500 CPU, I have triple boot with 98SE, XP, and Puppy Linux, all work fine.

The problem is when I try to use an Intel Pentium, the system will only post if I don't have anything plugged into the IDE connectors. Even a IDE cable with nothing attached will prevent it from posting/starting, only the fans turn on with no beeps. Unplug the IDE cable and it boots up fine. Tried different cables and different drives attached. Reset the cmos, loaded defaults, removed everything from the board, nothing has worked.

Any suggestions? I wanted to run a p90 and some dos games for nostalgia.

Thanks

Reply 1 of 2, by 5u3

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Many boards will not boot if an IDE cable is plugged in the wrong way around.

Reply 2 of 2, by TandySensation

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Good tip on the IDE, I used to do that sometimes with the old unkeyed connectors.

I figured it out. I was using a beta bios dated 2001. Installed a 1999 bios and now it works. Thinking about what the deal was and then I remember installing the very last bios I could find when I got the system because with the one it came with I couldn't install XP or see large hard drives.

The beta bios added support for K6-2+ and K6-3+ chips, must have somehow bumped out proper support for the non-mmx Pentiums.

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