I finally got around to testing a 3.3v AMD Am5x86 in my OrangePC 2 and it works! Well, mostly. First off, it just refuses to POST when set to the 3x multiplier. I believe that the issue isn't so much with the multiplier itself, but the fact that the bodge wire enables write back cache when in 3x mode. I didn't feel like moving the wire around to confirm since it works in 4x though. There are also some BIOS issues with the 5x86: The system will only ever report it as a 75MHz 486 regardless of the bus speed. HWiNFO, System Information 8.0, and TopBench 3.8 also believe that it is a 75MHz 486. However, Speedsys 4.78 does actually report it as an Am5x86 running at the correct clock speed. I even got a successful Speedsys run with a 40MHz bus and the CPU running at 160MHz with accurate looking benchmark results. I haven't gotten around to installing Windows on it yet, so I'll report back when I get that up and running stable.
I also received the other CL-PD6710 PCMCIA chip that I ordered from China and this one checked out okay on the multimeter (good VCC+GND pin locations). This one was a "Basis Communications" part instead of Cirrus Logic, so if you go looking for one, that is my recommendation at this time. The Basis part is also the one installed on the PCMCIA PC/104 board I have which I was planning on harvesting as a backup option. After soldering the new CL-PD6710 on to my OrangePC 2, it still boots. I don't have any software on it to test the slot functionality yet, but I hope to install Windows 95 on it this weekend and will give it a test then.
