Re: RFC : SOME IDEAS FOR THE APPLE II FPGA'ers

[bieling@terra.es (Jorge Chamorro Bieling)]

Michael J. Mahon <mjmahon@aol.com> wrote:

> I agree, and also doubt the real-world benefits of speeding them up
> beyond, say, 20MHz.
> 
> It would be crazy to throw out the baby with the bathwater, just to
> get the possibility of a 200MHz processor that no one could tell was
> running that fast when actually using the system.

A 200Mhz "stalled" CPU that keeps most of the time waiting because of
some bottleneck...

The bottlenecks... let's find them and see what can we do.

> > In an accelerated Apple II, either the STA or the LDA come/go to fast
> > ram, and the other will require a single slow Apple II cycle, so it's
> > throughput skyrockets to 1MegaBytes per second.. !
> 
> Actually, only the loads go to fast RAM, the stores usually go to both
> fast RAM and to the bus--you never know who's listening.  ;-)

Who may be listening out of I/O space ?
(don't count the V.O.C.)

> > Yes, in a sense, we are all wasting our time.
> 
> As long as we're enjoying it, it isn't wasted...

I'll try to explain that over here... :-)
-- 
Jorge Chamorro Bieling