On Fri, 27 Oct 1995, Dave Huang wrote:

> The only time I've gotten that error is when I ran the ISA bus at 12MHz, 
> which seemed to work fine for MSDOS, but gave me numerous "lost 
> interrupt" and "timeout" errors under NetBSD. Reducing the ISA bus clock 
> to 8MHz made everything work just great.

I suppose it's worth noting that ISA wasn't designed to run above 8MHz.  
Some hardware, even most, will let you get away with it, but you can get 
into trouble really quickly.

--scott