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Anyone able to identify this board?

Posted: Sat May 10, 2014 10:50 am
by Dragon6
Just picked up a Dragon 32 on Ebay as it came with a Dragondata disk drive :)

As I have a Dragon 64 already which I've had since childhood, I was planning to refurb the 32 and sell it on to a new owner.

However on opening the lid I spotted what looks like a modification connected to the motherboard.

I'm not overly familiar with the layout of the 32 but having looked online for images to do a comparison I didn't see any that had this board plugged in.

Anyone able to identify what it is, is it a factory standard component on some builds or is is some kind of upgrade?

Re: Anyone able to identify this board?

Posted: Sat May 10, 2014 9:00 pm
by KenH
see this thread:
viewtopic.php?f=5&t=151

Re: Anyone able to identify this board?

Posted: Sun May 11, 2014 9:38 pm
by Dragon6
Thanks for the link, interesting.

I'll have to compare the image quality from the monitor socket on this 32 with my 64 to see if there is any noticeable difference...

Re: Anyone able to identify this board?

Posted: Mon May 12, 2014 9:30 pm
by tormod
I would also be curious to know what quality improvement this board gives, and if it would be worthwhile to replicate it. Did anyone try an A/B comparison? The other thread doesn't really say anything about the improvement.

Re: Anyone able to identify this board?

Posted: Tue May 13, 2014 8:52 pm
by Dragon6
Did anyone try an A/B comparison?
I'm planning to at the weekend, unless I get an hour to spare before then.

Will take a few shots and post them here, and let you decide which is which!

Re: Anyone able to identify this board?

Posted: Wed May 14, 2014 11:26 pm
by Alastair
Dragon6 wrote:I'll have to compare the image quality from the monitor socket on this 32 with my 64 to see if there is any noticeable difference...
I don't have a 64, and I haven't seen one in the flesh (plastic?) for nigh-on thirty years, but isn't the 64 supposed to have a better quality display than the 32?

Re: Anyone able to identify this board?

Posted: Thu May 15, 2014 6:52 am
by KenH
Apparently, the Dragon 64 has this logic already built-in.
prime wrote:It's just struck me whilst looking at the Dragon 64 circuit diagram, that the board was obviously an improvement as it's included in the Dragon 64 circuitry (IC14 & IC13A).

Just looking to maybe try and convert my Atom RGB board to work on the Dragon & CoCo, would not be a problem if the 6847 was socketed :(

Cheers.

Phill.
viewtopic.php?f=5&t=4510&p=9844&hilit=PN48200#p9865

Re: Anyone able to identify this board?

Posted: Thu May 15, 2014 3:30 pm
by Dragon6
Apparently, the Dragon 64 has this logic already built-in.
I hadn't seen this when I did a few comparisons this morning between the 32 and 64, and I did notice a difference, but whether that could just be down to other factors such as component age etc, that could always be a possibility.

I know someone that has a 32, if I can get hold of that and confirm it doesn't have one of these enchanting boards fitted, that would then be a fair comparison.