On Thu, Jan 4, 2018 at 11:00 AM, Murray McCullough via cctalk < cctalk@classiccmp.org> wrote:
> This may be off-topic but these latest uprocessor exploits has raised > a question: Are the 'old/classic' uprocessors using x86 technology in > the same boat? The very earliest ones, i.e., 1970s and early 80's. > probably not. How many are actually in use and/or on the Net? > I've seen it reported, but haven't verified, that this bug extends about 20 years back in the past to the Pentium Pro/Pentium II class of machines. If I read that correctly, there's only two generations of Pentium not affected, the P54C and P55C, the former of F00F fame... 386 and 486 CPUs apparently aren't affected since they didn't have speculative execution. The 8088/8086/80186/80286 presumably are also immune... If you extend things further back, CP/M on Z80/8080 is also fine, but I don't think those are properly x86 :) Warner
