FRESH

Hacker News

Mystery Cpuid Bit

38 points by userbinator

by Sweepi

0 subcomment

And people say "never read the comments":
CL says: April 20, 2026 at 9:18 pm
I updated sandpile.org to reflect that
```
  Bit 19 = MP-capable
  Bit 18 = ECC-capable
```
Those were two distinct capabilities.
[sources: K7 µcode + K8 XOS-based public simulator published in 2000 + I worked at AMD back then]

by haunter

1 subcomments

That’s the NSA backdoor /s