[Coco] TC-9

[Chuck Youse]

On Mon, 2008-07-07 at 21:49 -0400, jdaggett at gate.net wrote:

> The only analog functions are the composite video from the internal DAC the RGB DAC 
> and the oscillator circuitry on board. The oscillator and its quadrature phase is rather easy 
> to do in an FPGA given the modern DLL/DCM in most chips. 
> 

The composite signal by itself will be a bitch.  And don't forget the
drive requirements on the E clock.  Anyway, the point is it'd require
external components, an FPGA alone won't suffice, but I think we agree
on this point.

> My requirements right now is a small, portable and battery operated embedded board. The 
> key requirement is small and with either a minimum of 512K of sram and and SPI flash or 
> 8K of sram and 2MB of parallel flash. Currently leaning towards the large SRAM and serial 
> flash. A 6809 processor would be nice since I am familiar with it. An HC11/12 would also 
> suffice. Actually leaning to do something like embedding HC11 periherals around a 6809 
> core that is freely avaialble. Kind of like a HC11F1 with a 6809 core instead. 

Interesting!  Do tell more ..

C.