29 Jan
2002
29 Jan
'02
12:45 a.m.
--- Mike <dogas(a)bellsouth.net> wrote:
From: Ethan Dicks <erd_6502(a)yahoo.com>
>
> > > That sounds wicked. I wonder how they handled the 12-bit bus of
> > > the 6100.
> >
OSI bus is 12bit address and data. Pins 13 -16 = D8 -
D11, but I don't
know anythng about the EMA bits or RAM use under the 6100.
I caught the other correction about 12 bits data, 20 bits address... so
there's no conflict. Presumably, you would stuff extra chips to put
RAM off of D8-D11 (who'd want to have them populated if there were only
8-bit CPUs in the box), but at least the bus bits are there.
As for the EMA, that's no big deal either... the 6100 will assert them
as needed, and the memory cards would just see them as A12-A15.
-ethan
__________________________________________________
Do You Yahoo!?
Great stuff seeking new owners in Yahoo! Auctions!
http://auctions.yahoo.com