[Coco] FW: Multi-Processor 6809 Computer System

[L. Curtis Boyle]

This was the original design goal of the TC-9/TC-70 combo from FHL, as well, although I don't think more than rudimentary test code was every completed (Bill Nobel and I, who did the 2nd version of the TC-9 OS-9/NitrOS-9 drivers) never had a K-BUS or TC-70 card, so we never got involved with it).

L. Curtis Boyle
curtisboyle at sasktel.net



On Apr 30, 2013, at 9:51 AM, Bill Gunshannon wrote:

> 
>> The Fujitsu FM-7 computer uses 2 6809 being on of them for generating
>> graphics. There is no vdp on this computer, the second 6809 is used
>> exclusively for generating 8 color 640x200 pixels graphics.
>> 
>> Some dual 6809 arcades do the same.
> 
> Systems with more than one processor were more common than you might
> think, but in most cases it was not any kind of multi-processing.  The
> second processor was used exclusively for IO.  The Tandy Model 16 had
> an entire Z80 compouter system (the Model II) built into it for such a
> task.  When using the M68K the Z80 was an IO processor and all IO went
> thru it.  There were others, (Midwest Scientific was one, I thinkh dual
> 6800's).
> 
> bill
> 
>> 
>> 
>> On Sun, Apr 28, 2013 at 10:42 PM, Mark McDougall
>> <msmcdoug at iinet.net.au>wrote:
>> 
>>> FWIW there were a couple of arcade boards that used dual 6809's for
>>> which
>>> there are schematics available... Time Pilot 84 is one example. There
>>> was
>>> a master-slave relationship between them - might be of interest to some
>>> to
>>> check out the schematics!?!
>>> 
>>> 
>>> On 29/04/2013 12:26 PM, Mark McDougall wrote:
>>>> 2 minutes on Google...
>>>> 
>>>> <http://etd.ohiolink.edu/view.cgi?acc_num=ohiou1183654502>
>>>> 
>>>> 
>>>> On 29/04/2013 12:12 PM, Lothan wrote:
>>>>> HARDWARE DESIGN OF A MULTIPROCESSOR SYSTEM WITH FIVE MOTOROLA MC6809E
>>>>> MICROPROCESSORS
>>>> 
>>> 
>>> --
>>> |              Mark McDougall                | "Electrical Engineers do
>>> it
>>> |  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"
>>> 
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>> 
>> 
>> 
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> 
> 
> -- 
> Bill Gunshannon          |  de-moc-ra-cy (di mok' ra see) n.  Three wolves
> billg999 at cs.scranton.edu |  and a sheep voting on what's for dinner.
> University of Scranton   |
> Scranton, Pennsylvania   |         #include <std.disclaimer.h>
> 
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