[Coco] Stable colours

[Mark Marlette]

Luis,

BGA type components require xray to verify quality. Others will say it is not required but IMHO, it is the only way to verify placement and joint quality.

So that really rules out most home assembly lines.

A quick look the EPM570 fits on the LEs but the 16KRAM will be a problem in the Altera line as I know it. Depending how this is used, external SRAM could replace it along with the SDRAM.

5.4nS device EPM570 w3.3v core is ~$13.33 at Digikey in a 100 pin TQFP package, which is easily to solder at home with the proper tooling. Go to the 144pin TQFP price jumps to $18.10


Depending on pin counts, price will vary.

 
Mark Marlette
http://www.cloud9tech.com
mark at cloud9tech.com


________________________________
 From: Luis Antoniosi (CoCoDemus) <retrocanada76 at gmail.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
Sent: Tuesday, September 30, 2014 8:55 AM
Subject: Re: [Coco] Stable colours
 

Well if you go for a DE0-Nano it costs 80 dollars. The daugher board is
pretty simple, 10 dollars and the components pretty available: bunch of
resistors, a variable resistors, a small protoboard and a VGA connector and
a stackable 40 pin header. Got everything from a local store.

But it could be done on a CPLD for reduction costs. I don't have the tools
for CPLD development, nor I don't make an idea how to solder a FBGA chip .
Mark Marlette ? Darren A. ? Who else ?

It would require a CPLD with 550 LEs, 16K bits of RAM and a external SRAM
with 512Kbytes or a SDRAM as the Altera. For a SRAM the code must be
changed since the DE0-Nano has only SDRAM.

Don't know if that would beat the 80 dollars asked by the Altera. But Daren
made de SDC for a 50 bucks cost. Maybe that would be a reasonable price.

Luis Felipe Antoniosi



On Tue, Sep 30, 2014 at 9:15 AM, Gene Heskett <gheskett at wdtv.com> wrote:

> On Tuesday 30 September 2014 08:02:45 Luis Antoniosi (CoCoDemus) did opine
> And Gene did reply:
> > colours as we say in canada:
> >
> > https://www.youtube.com/watch?v=zSgr5dHvswM
> >
> > Nick Marentes will love my scanlines :)
> >
> >
> >
> > Luis Felipe Antoniosi
>
> Now that is pretty darned good Luis. Cost estimate?
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> Genes Web page <http://geneslinuxbox.net:6309/gene>
> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>

-- 
Coco mailing list
Coco at maltedmedia.com
https://pairlist5.pair.net/mailman/listinfo/coco