1993 article on building a multiprocessor 6809 box.
http://www.bradrodriguez.com/papers/6809cpu.htm
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On 8/2/2019 11:15 AM, Liam Proven via cctalk wrote:
1993 article on building a multiprocessor 6809 box.
http://www.bradrodriguez.com/papers/6809cpu.htm
Read that page years ago.I have always like the 6800 CPU
model.I have used that model for a 18 and 20 bit cpu design
currently being bread boa
> On August 2, 2019 at 5:49 PM ben via cctalk wrote:
>
>
> On 8/2/2019 11:15 AM, Liam Proven via cctalk wrote:
> > 1993 article on building a multiprocessor 6809 box.
> >
> > http://www.bradrodriguez.com/papers/6809cpu.htm
>
> Read that page years ago.I have always like the 6800 CPU
> model.
> -Original Message-
> From: cctalk On Behalf Of ben via cctalk
> Sent: 02 August 2019 23:50
> To: cctalk@classiccmp.org
> Subject: Re: MULTIPROCESSING FOR THE IMPOVERISHED Part 1: a 6809
> Uniprocessor
>
> On 8/2/2019 11:15 AM, Liam Proven via cctalk wr
Many were not published. A friend built a TTL computer based on the PDP-8 but
no details were published.
There was a design in the UK called the "weeny-bitter" in the Amateur Computer
Club newsletters. Not sure how many got built...
Information is scattered through the magazines. I think start
On 08/03/2019 02:06 PM, ben via cctalk wrote:
Many were not published. A friend built a TTL computer
based on the PDP-8 but no details were published.
A field service tech at a company I once worked for built a
16-bit computer that was a whole generation better than the
12-bit machines that c
Ben said
> Where are all the articles about a TTL designed computer?
> Yes I know about (Homebuilt CPUs ring) but that is mostly
> today. What about the Late 70's and Early 80's?
Well there's the EDUC-8, based on the PDP-8 instruction set and was published
from 1974 to 1975
by Electronics Austral
On 8/5/2019 1:40 AM, Steve Malikoff via cctalk wrote:
Ben said
Where are all the articles about a TTL designed computer?
Yes I know about (Homebuilt CPUs ring) but that is mostly
today. What about the Late 70's and Early 80's?
Well there's the EDUC-8, based on the PDP-8 instruction set and was
On Fri, Aug 2, 2019 at 11:15 AM Liam Proven via cctalk <
cctalk@classiccmp.org> wrote:
> 1993 article on building a multiprocessor 6809 box.
> http://www.bradrodriguez.com/papers/6809cpu.htm
>
I disagree very much with the author's advice to use the MC6809 rather than
the MC6809E. With the E vers
On Tue, Aug 6, 2019 at 1:19 AM Eric Smith wrote:
> With the [MC6809]E version you have to supply a quadrature clock, but all
> that's required to generate that is a single-phase 4x clock (which you need
> with either the E or non-E part) and a single 74HCT74.
>
In case anyone needs to see how th
o: "Liam Proven" , "cctalk"
Sent: Tuesday, August 6, 2019 12:19:55 AM
Subject: Re: MULTIPROCESSING FOR THE IMPOVERISHED Part 1: a 6809 Uniprocessor
On Fri, Aug 2, 2019 at 11:15 AM Liam Proven via cctalk <
cctalk@classiccmp.org> wrote:
> 1993 article on
On 8/6/2019 6:38 AM, Norman Jaffe via cctalk wrote:
I built a dual-6809 in the late '70s - it was a brand-new, exciting part - and
we used the E part for exactly that reason. The system used memory that had an
access time that was better than the 4x clock, so that each processor could run
at f
Ben wrote on Tue, 6 Aug 2019 13:47:59 -0600
> It was too bad the 6809 did not have a pin to indicate Instruction or
> Data memory bank in use. That would of given a real unix system in the
> 8 bit world, as by then (late 70s) 64kb was proving just to small for
> any real use.
I added a circuit to
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