[Coco] Multi-Pak Interface question.
tjseagrove at writeme.com
Tue Mar 3 21:23:06 EST 2009
Chris Hawk, who is on this list, made a product called the SlotPak III. I
own one and used it until everything got packed away. Soon, it will find a
home in my new computer room where I will setup my CoCo III again. It
worked great and never had any problem at all with it. Everything was
housed in what looked like a standard floppy controller housing and had a
base to support it. It had a total of 3 slots and 2 were switchable.
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
Behalf Of Phill Harvey-Smith
Sent: Tuesday, March 03, 2009 7:56 PM
To: CoCoList for Color Computer Enthusiasts
Subject: Re: [Coco] Multi-Pak Interface question.
Rick Taylor wrote:
> Has anyone ever made Multi-Pak clones?
I believe there are a couple of designs that I have seen, after all it's
not really rocket science, really just a buffered bus expander with some
selection & arbitration logic really.
> Would it be legal to do so?
I'm not a lawyer so all IMHO :)
Literal hardware clones, probably, but wether it would be a problem
would depend on wether Radio Shack where interested in persuing it,
considdering that the Dragon 32/64 where a virtual clones of the CoCo,
I'd say probably not. Also considdering the age of the hardware in
question it would probably not be worth it.
Logical clones using the same registers at the same IO locations and
custom designed hardware using say LS logic or a CPLD should be fine.
As an example look at all the IBM PC clones there where, which where
functionally identical, and IBM couldn't do anything about them, unless
as was the case with some of them, they ripped off the IBM bios, rather
than coding their own.
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
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