Found a scan doubler ( who would like one ) ?

[IOWASURFER]

Been chatting with a gent about making the Amiga community
a scan doubler...
This device would hook to the rgb port and allow a sync to 31hkz to any vga monitor but wanted to know who would be game..

These have been working on Atari computers rock solid for awhile now and
i believe they would work just fine for Amiga as well...

Would be about $65-75$ but wanted to see if there was any interest first???

http://www.miba51.com/CoCo_VGA_Adpater.html

If theres enough interest Roy said he would make and sell them to Amiga folks..


Here is a flicker fixer/ scan doubler going on ebay now
I was bidding at 222$ I got out bid and I said heck with this has to be a better way
and then I found Roy!
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  As soon as he has a prototype will post the results here!
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Joe..


_________________
Friends Do not let friends use IBM's.......

(2) TWIN Amiga 1200A 6804 1240
(1) Amiga 2000 GE-Force 6804 WB3.9
(6) Amiga 500

[JuvUK]

Hi,
 Well I'm interested, but I'd like to see the results on an Amiga 1st
cheers, Justin

[amiga92570]

I would say for that price about half the Amiga.org users would buy one.

[Delta]

Yeah I might like to buy one too considering I hate to have too many monitors  on the desk so I could just use a switch instead for my LCD

[Damion]

Not sure I get it... the XRGB2 is pretty expensive, and difficult to find now.

[trip6]

I'd buy 3 for that price, but I would also want to see this tested with an amiga in PAL\NTSC modes and with FlatScreen LCD in PAL\NTSC screen modes... If it works with an Amiga well in these modes, then I'd definately buy...

[IOWASURFER]

This chap has made a scan doubler for the Atari and now I asked him to look into the Amiga so he is concentrating on the Amiga now he has been able to make them for 65-75 $ USD recently as last year.. IF he can do the same for the Amiga we will have a very cool solution...

Joe..

[joekster]

If it was all ready to go for an amiga I'd get one for $75 and two if they were $65.

[Damion]

I guess what I'm not understanding is that the link is for a device that connects a coco to an XRGB... the Amiga can connect to an XRGB with nothing more than a SCART cable. (In fact, doesn't the XRGB handle 15kHz via an RGB in?)

Granted, if someone can produce a scan doubler + flicker-fixer for $65, I'm sure it would sell very well.

[carvedeye]

I would definately have one for that price.

[IOWASURFER]

http://www.miba51.com/CoCo_VGA_Adpater.html

here is the one Roy worked on for the Atari..
I believe its his design or a variation..

The info is on this site..

Joe

[trip6]

Yes and the key is to test it with Amiga Games as well...

[adonay]

Hmmm i am just happy i just found a scandoubler for my a1200 elsewere "internal one " :-p but have to say not for this price

[IOWASURFER]

http://www.miba51.com/CoCo_VGA_Adpater.html

Here are the details!!
I talked to Roy the one making the boards for ATARI right now.. He is currently working on this for the Amiga and would like to take some time and see how it comes out!!!


Joe..

alexh     Posted on: 2007/9/28 8:28
Defender of the Faith




Joined: 2005/4/30
Posts: 1012
Oxford UK
alexh has talked about this for awhile..

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Re: Amiga RGB to VGA monitor - recent experiences?

If you dont mind a 16-bit scandoubler / flicker fixer then you can buy them in the US for $48

http://www.miba51.com/CoCo_VGA_Adpater.html

http://www.atari-forum.com/viewtopic.php?t=10709&start=0

Email Roy R. Justus (RJRTTY at aol dot com) for details.

While fine for ECS, there is a slight loss of colour resolution in AGA.
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[alexh]

IOWASURFER wrote:
http://www.miba51.com/CoCo_VGA_Adpater.html

here is the one Roy worked on for the Atari..

Actually that website shows Roy's first(?) use for his scandoubler, the Tandy Colour Computer (aka CoCo).

I believe its his design or a variation..
The info is on this site..

Yes I think it is, based perhaps on the Averlogic reference design. So far his scandoubler looks to be approx the same design between different computers (Tandy, Atari) perhaps a little evolution between revisions.

AFAIK he tweaks the default register settings to find the best one for each computer. centering, contrast, brightness, overscan etc.

The source code for the "tweaking program" and the I2C emulator is/was available from the Averlogic support site.

I guess you'd have to ask Roy about a cable if you wanted to tweak the settings yourself.

The heart of the scandoubler is/was an Averlogic AL875 ADC and an 16-bit AL250A Scandoubler/Flicker Fixer.

The big downer is that it is 16-bit, which means a fewer colours for AGA screens (which can be 24-bit). The Atari STe and ECS Amiga are 12-bit which are fine.

The little downer is that it probably wont work (well) with every Amiga screen mode possible. But I am sure it will work with PAL/NTSC with and without lace fine.

I hope that this time he uses a sheilded monitor cable instead of a ribbon cable like on the Tandy and Atari.