First post, by red-ray
From SIV 5.70 Beta-03 I have been trying to better detect if a CPU is an AMD Am486 or an Intel i486. Below you can see this works with my two 486 CPUs, but wonder how SIV will do with others. My Intel DX2 CPU has CPUID which makes it easy to deal with and also means it's possible to deduce a CPU is AMD in some situations as it will not have CPUID. It's only AMD vs. Intel that is tricky and SIV has been able to detect Cyrix based CPUs for a long time.
If you have an AMD Am486 or an Intel i486 please will you post the SIV 5.70 Beta-04 initial and Menu->Hardware->CPUID->CPU-0 screens so I can check and if needed adjust the detection code. If you know the Sspec code please also specify this. What I need to know is what Windows reports as the Revision for a selection of AMD + Intel 486 CPUs that don't have CPUID. Below you should see my AMD Am486 DX2 reports FFD0. I expect Winodws 9x will report different values to NT 4.00 for the same CPU.
I wonder why my SX807 has CPUID 0436 which is different to the 0435 specified in https://www.cpu-world.com/sspec/SX/SX807.html
Note: I am looking for information so I can improve the SIV AMD vs. Intel 486 CPU reporting and do not wish this thread to end up as a general discussion about how to do this. If you wish to start such a discussion then a new thread should be started.