3 ms·

I'm curious if the register you see near the microcode ROM is potentially hooked up to MSRs -- it could potentially be a read or write buffer. https://www.cs.c

I'm curious if the register you see near the microcode ROM is potentially hooked up to MSRs -- it could potentially be a read or write buffer. https://www.cs.cmu.edu/~ralf/papers/highmsr.html https://www.cs.cmu.edu/~ralf/papers/highmsr.html > To the left of the MAR is a 32-bit register that is apparently unrelated to the microcode ROM, although I haven't determined its function.

kens 2y ago
That register could be a Model-Specific Register; I haven't looked at it closely enough to see what it does. The Pentium is very complicated with 3.1 million transistors, so my reverse-engineering of it is essentially bits and pieces here and there.