Re: General 6809 card for 6502 machines

Den Wed, 18 Oct 2017 14:42:53 +0200 skrev Nils Eilers
<nils.eilers@gmx.de>:
 
> Due to its unbeatable simplicity, I've kept the solution of powering
> the 6502 off when the 6809E is active but offered support for the
> WDC65C02 as well. The WDC65C02 seems to allow to tristate the address
> bus and data lines, so I added a jumper to the board to use this one
> too instead of the old NMOS 6502.

How about adding 244/245s as external tristates? That way we could get
rid of the "power off" thing but still reuse the existing 6502. But it
would cost board space, maybe it wouldn't fit in the 10x10 format?
 
> If some of you guys would be interested in having a look at my design,
> I'd upload the design to my website. As I said, it's almost done, but
> maybe good reasons will arise for late time changes.

Can't promise anything but if you put it on your site we might have
some feedback to give :)

-- 
(\_/) Copy the bunny to your mails to help
(O.o) him achieve world domination.
(> <) Come join the dark side.
/_|_\ We have cookies.

       Message was sent through the cbm-hackers mailing list