From: Richard Erlacher <edick(a)idcomm.com>
the "vintage-PC" chipsets were 5 MHz parts, I
do believe. That still
wasn't
rocket-fast, but it was adequate for the 4.77 MHz
i8088.
Yes, and NEC and INTEL were selling 8mhz parts before then.
The "PC" was slow by contemporary standards. I'd have likend it to
building
a 2mhz z80 system in 1981, equally poor thing to do.
Allison