Re: Cycle by Cycle Problem?

["sicklittlemonkey" <Nick.Westgate@gmail.com>]

> Maybe you can special case this, trapping only floating bus-location
> references, but you've got to have exact information about how many
> CPU cycles have happened since the top of the video field to figure
> out what vapor to present, don't you?

Exactly, this is the easiest way to do it for a fixed speed CPU.

In the case of a faster CPU like a Zip Chip etc, I'm wondering if it
had
a write-through cache policy for currently displayed video memory or
something. In any case, the CPU speed was not constant, so it would
complicate emulating the floating bus.

Cheers,
Nick.