[Coco] Embedded coco

[jdaggett at gate.net]

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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