3 ms·

I think early 286 chips didn't go up to 8MHz. The IBM RT PC (the ancestor of the 6000) was only introduced 2 years after the AT: https://en.wikipedia.org/wiki/

• chipotle_coyote 6y ago
  Hmm. The Tandy 2000, Radio Shack's ill-fated first foray into the world of MS-DOS in 1983, used an 80186 (yes, 186) clocked at 8 MHz, so it would seem odd if the 80286 couldn't have at least matched that. From what I can find at a cursory search, the 80286 first shipped at 5 MHz, 6 MHz and 8 MHz versions, although the AT apparently used the 6 MHz version when it first shipped in 1984, not bumping up to 8 MHz until 1986.