[Coco] Stable colours

Tue Sep 30 17:19:59 EDT 2014

See that FPGA is available in a TQFP, $13 or something like that.

I would just make your own board instead of all the cables = noise, etc, especially in video!

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 1:14 PM
Subject: Re: [Coco] Stable colours

or these one:

http://www.ebay.ca/itm/ALTERA-FPGA-Cyclone-II-EP2C5T144-Minimum-System-Development-Board-/301303366478?pt=LH_DefaultDomain_0&hash=item462714834e

more suitable with a 50Mhz clock. Same as altera de0-nano.

Luis Felipe Antoniosi

On Tue, Sep 30, 2014 at 2:09 PM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> I don't need RAM if a external SRAM is used but it would require to be
> dual port since the read/write are in distinct clocks.
>
> Also, I need a PLL that locks at exactly 114.5454 witch is NTSC 3.579545 x
> 32. Yes I need to digitize evey pixel 8 times.
>
> Does this CPLD have LVDS ports ? I need 3 of them.
>
> Doesn't worth buynig those instead ?
>
>
> http://www.ebay.ca/itm/ALTERA-Cyclone-FPGA-Development-Board-JTAG-AS-SPI-Flash-EP1C3-Quartus-II-CPLD-/230960685109?pt=LH_DefaultDomain_0&hash=item35c6546035
>
> It has a 30Mhz clock, not certain at this. I could check on Quartus.
>
>
> Luis Felipe Antoniosi
>
>
>
> On Tue, Sep 30, 2014 at 1:48 PM, Mark Marlette <mmarlette at frontiernet.net>
> wrote:
>
>> 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
>> >
>>
>> --
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>
>

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