Re: IIgs device control question

[stocks.hunts@yahoo.com]

On Jul 8, 4:13 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
> mswaine wrote:
> > As some of you know, I'm (slowly) working on a GS Nadanet remote
> > device control project, with the actual device control based on the A2
> > designs in David Pessen's book Industrial Automation. Right now, I'm
> > interested in using the John Bell 6522 parallel card (one of several
> > options he recommends), but I'm learning as I go here and I'm worried
> > about it working correctly with the 65C816, since everything I've read
> > on the card so far seems to relate only to the 2E. Would I be running
> > into timing issues or other icebergs in this ocean?
>
> The peripheral bus speed for all Apple II's, including the IIgs, is
> 1MHz, so your parallel card(s) will be quite happy.
>
> Since you're running NadaNet, you will be running the IIgs processor
> at 1MHz as well, so even 6502 timing loops will perform as expected.
>
> -michael
>
> AppleCrate: An Apple II "blade server"!
> Home page:  http://members.aol.com/MJMahon/
>
> "The wastebasket is our most important design
> tool--and it's seriously underused."

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