Well, unfortunately I found a board that this mod *doesn’t* work for. I bought a Micronics (Micron) M54Li since it would be able to cache more than 64MB of RAM — and my modded Tilamook locks up if L2 is enabled. I even tried adding split rail detect mod even though the CPU already booted without it.

So, this isn’t a silver bullet. There are apparently motherboards that you still can’t enable L2 on…