[Coco] Embedded coco

[jimcox at miba51.com]

James:

Given the age of a lot of these parts, how much trouble 
have you had finding them?  Maybe a FPGA version would be 
more of what is needed or take another chip such as the 
HC12 and port NitrOS-9 over to it.  Someone was talking of 
porting it over to the 68000 or at least running a 68000 
in 6809 mode (never heard of that before the recent 
conversation)

Jim

On Wed, 17 Dec 2003 19:36:18 -0500
  jdaggett at gate.net wrote:
>Gee whiz 
>
>Sounds like something I was thinking of for a project. I 
>was going to start with a 
>CoCo3 and then maybe into a striped down version. Maybe 
>still able to run a 
>stripped down version of OS9 in flash and a small to 
>medium LCD display. 
>
>A couple of questions:
>
>1) what kind of ram and how much?
>2) Which PCB layout tool you plan to use?
>3) Will you include the current expansion port of the 
>CoCo?
>4) Total Ram and Rom on board? 
>5) Any provisions for SRAM in surface mount package
>6) Resistors and caps in Surface mount or thru hole?
>
>I have been accumalating parts now for about three months 
>and looking at some 
>software. 
>
>james
>
>On 17 Dec 2003 at 15:06, peak at mail.polarcomm.com wrote:
>
>> About using a coco mother board as an embedded 
>>controller!
>> How many people would be interested in a mini coco?
>> It could/would be on a small ckt board and would have:
>> cpu(6809)
>> rom
>> ram
>> a PIA or two (address decoded to the exact same 
>>locations as 
>> a real coco.
>> DAC
>> Small PAL/PLD used as an address decoder. Both the CTS, 
>>and 
>> the SCS lines would also be duplicated.
>> 
>> WhY?
>> Because by using the same hardware memory map for the 
>>PIA's 
>> and DAC would allow a much smaller controller . also a 
>>real 
>> cocoI or II would not have to be sacrificed to use as 
>>the 
>> controller. But a real coco could be used to test and 
>>debug 
>> software before it was placed in rom on the embed board!
>> 
>> If anyone is interested I will design the ckt board and 
>>place 
>> the design in public domain or even post it here if 
>>allowed.
>> Heck I may design this thing anyway just for myself. Any 
>> takers??
>> 
>> Eric 
>> 
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>
>
>
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