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Old 03-24-2008, 08:22 PM   #41
TheGoose
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Default Re: A1000 S-Video Hack video now on Google Video

Just the SVideo / Composite model one. I also have the assembled version. Just got the hole drilled tonight and realized I need to get some different solder after playing around with the iron.

I don't get the 2 grounds and this board though. S-Video has two matching grounds but the neobitz has just one ground and then the composite (yellow) lead?

Is there something I don't know about the s-video ?
Didn't plan on using the composite anyway...

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Old 03-24-2008, 08:39 PM   #42
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Default Re: A1000 S-Video Hack video now on Google Video

Great video, bravo! :-D
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Old 03-24-2008, 08:43 PM   #43
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Default Re: A1000 S-Video Hack video now on Google Video

Quote:
abbub wrote:
TheGoose: Did you get the Component/SVideo/Composite model, or just the SVideo/Composite model??

I have the one with Component installed in my A2000, but haven't been able to get component working on my 46" Samsung TV. I'm not sure whether it's something in the Neobitz (like the lack of sync cleaner) or something in the TV. I'm waiting to upgrade Denise/Agnus later this week, then I'm going to try it on a buddies TV to see if it works. If it doesn't, I'll get the sync cleaning circuit parts and try that. The SVideo looks amazing, and the color composite is a welcome addition (and looks better than the mono composite...)
FWIW -- On my JROK component project, I tried both CRT and LCD TVs with and without homebrew sync-cleaner, and it made no difference. Definitely easy and worth a shot, though.

edit -- Actually, I tried the JROK "sync cleaner" (no difference), the "homebrew" aspect was an IC to combine separate H and V syncs into a known "good" csync signal for both the sync-cleaner and standalone JROK. (Was desperate to try and get a good picture somehow...) Anyway, no difference regardless of sync used.
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Old 03-24-2008, 10:44 PM   #44
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Default Re: A1000 S-Video Hack video now on Google Video

The Goose:

You can use the one ground coming off of the Neobitz for all of your grounds.

I drilled holes in one of the back plate and mounted Composite, Chroma, Luma, SVideo, and the three component connections. Since the backplate was metal, I ran the ground to it and all of the metal connectors except the SVideo got their ground from it. Since Chroma/Luma and SVideo are the same thing, I used the 'ground rings' that came with those RCA connectors to run to the SVideo connector. (I wanted Chroma/Luma RCA connectors for my 1702 Monitor)

This is a completely solderless install on the A2000, by the way. I managed to connect to all of the needed signals through the video port. (It's a complete hack, but it works...)

Here are some pix:


^^
This is the Neobitz mounted to the side of the power supply (double sided tape...a temporary solution...) That was the best place to put it within reach of the video slot and the backplate I wanted to use.



^^
This shot kind of shows you how I connected it. Essentially I found the correct locations on the card slot, tinned the wires heavily to give them more contact area, and made a plastic shim to insert into the slot to press the card connections out. In a perfect world, I'd love to find a card edge to solder these connections to. It looks like the 16-bit extension on an ISA card would do the trick, but I didn't have any down in the basement to hack apart.


^^
This shows the back of the Amiga now. From bottom to top, it's one RCA for composite, two RCAs for Chroma and Luma, SVideo, and three RCAs for component.
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Old 03-24-2008, 11:00 PM   #45
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Default Re: A1000 S-Video Hack video now on Google Video

-D-

Yeah, I figured I'd give it a shot, since it's really not going to be that difficult to implement. If it works, it works, if not, C'est le vie.
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Old 03-25-2008, 06:45 AM   #46
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Default Re: A1000 S-Video Hack video now on Google Video

Thanks for the ground info and those great pics.

Nice work...
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Old 03-25-2008, 08:27 AM   #47
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Default Re: A1000 S-Video Hack video now on Google Video

Thanks! The pictures aren't all that great, but they should give someone an idea...

I should clarify, by the way, that it's solderless only in so far as I didn't have to actually solder anything onto the A2000's mainboard. I can pull the neobitz out if I need to and no one would ever know it was there.

S-Video on my 46" LCD looks really good, even in high res interlaced mode.

A vaguely related tangent:

In December I was talking with my girlfriend about the level of knowledge (or lack thereof) that a lot of the Jr. developers I've been running across have. I, in curmudgeon fashion, mentioned that in the old days we were a lot more in tune with the hardware because we had to be, because there wasn't an internet to go download an easy fix from. When I dug the Amiga and all of its related stuff out of the basement last month, I started flipping through the manuals. When I got to the end of the user's manual and found the schematics for the mainboard I started laughing because it was exactly what I was talking about. When's the last time you've bought a computer that included a schematics for the motherboard (or any other component)?! Anyway, when I saw the A1000 mod on youtube, I wondered how hard it would be to do the same thing with the A2000. Then I remember that all of the information I'd need was right there in the user's manual. A quick glance showed that all of the connections I'd need were right there.
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Old 03-26-2008, 11:30 AM   #48
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Default Re: A1000 S-Video Hack video now on Google Video

Hmmm, soldering sucks. My hole is great, I make great holes!

And what about this?

http://www.computercasesandcables.com/ccc/CV-25120.html

Will this work with amiga to vga adapter? I am having a hard time getting the output wires on to the s-video connector, arrgghh!

:-(




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Old 03-26-2008, 11:43 AM   #49
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Default Re: A1000 S-Video Hack video now on Google Video

Yeah, soldering the SVideo connection is kind of a pain. Another reason why I wasn't unhappy about going from the Chroma/Luma RCA connectors to the SVideo connector. I was able to run a slightly smaller gauge wire that worked better with the SVideo connector. You can put just a touch of solder on the Svideo connector, and then tin the wires you're running to it. Then you really only have to 'heat up' the existing solder on the wire or the connector and 'set' the wire where you want it.
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