[Coco] Retro computer, somewhat similar to CC1/MC-10.

[jdaggett at gate.net]

Phil

The core is an adaption of the basic core that XESS Corp put out for their 
XESS95 board. That used a XC9500 series CPLD and I think the code is 
freely downloadable from their web. If not I have it and could send it to you.

james


On 3 Nov 2008 at 19:28, Phill Harvey-Smith wrote:

> jdaggett at gate.net wrote:
> > Frank
> > 
> > I would think that the microcontroller was something like a PIC, SX
> > or that type of microcontroller. 
> 
> Having a look at some of their other products, It may well be a PIC,
> as I can see the Microchip logo on (for example the mouse->serial
> thingy, which only seems to have one 8 pin chip).
> 
> >		The heart of the board is the ezVGA chip. With its 
> > cost of $25 and some comments I have researched this may very well
> > be a Xilinx XC9500 series CPLD. 
> 
> Yep and looking at the VGA chip pinout and comparing it with the
> Xilinx data sheet pins 28,29,30 and 59 are marked no connect on the
> VGA, supprisingly those are the programming pins on the Xilinx data
> sheet, power pins seem  to match too....
> 
> Ok, I now wish they sold it as a soft core, as I already have some
> Xilinx chips....
> 
>  >                        A simple VGA willfit in a Xilinx XC9572 and
> 
> Yep infact one of the first things I did with a CPLD, was to get it to
> generate coloured boxes on the VGA screen, just with internal logic
> and counters, no memory interface tho.
> 
> Cheers.
> 
> Phill.
> 
> -- 
> Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric
> !
> 
> "You can twist perceptions, but reality won't budge" -- Rush.
> 
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