[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.

> 

> --

> Coco mailing list

> Coco at maltedmedia.com

> http://five.pairlist.net/mailman/listinfo/coco