Is it possible to get s-vid out a Genny via a cable?
Is there a mod to do so otherwise?
Thanks.
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Is it possible to get s-vid out a Genny via a cable?
Is there a mod to do so otherwise?
Thanks.
well you could try this
http://www.buyritegames.com/product_...=1025&back=yes
or ask at segaxtreme. i tried finding a link but got tired.
since i cant link directly to threads at SX heres part of one
"If you are willing to put together a circuit, it should be possible to use a video encoder IC (such as the Analog Devices AD720, or whatever has replaced it now) to convert the RGB to S-Video. I'm not sure what kind of quality this would yield, but I think it would probably be better than composite as long as the circuit is constructed well."
"there's no need for that if you got a later model 2.. it already outputs s-video, the pins are just not wired. AFAIK a few caps and resistors suffice to get s-video out of it. "
"Hello qube,
Firstly you need to know which board version your Mega Drive II has. This mod *ONLY* works for the (uncommon) VA4 board - I'm afraid there's no easy way to add S-Video output to VA1 and other earlier boards. (The version number is printed on the board itself.)
Find a chip on the board labelled CXA1645 - this is the composite encoder, which provides S-Video as well as composite output. You simply need to make the appropriate connections to the chip, as follows:
Pin 15 - Chroma © output
Pin 16 - Luminance (Y) output
Pin 24 - Ground It's as easy as that! No other components are required, you can simply wire your cable directly to this chip."
"ok, I just modded my genesis 3 for s-video, just to see if it works.. and it does.
this will only work for genesis 3 and newer model 2 genesis. it's not possible on model 1 and earlier model 2.
open up the system and locate the chip "Sony CXA 1645/M". it's a 24 pin chip.
you need:
- wire (duh)
- a s-video socket
- 2 75 ohm resistors
- the usual soldering equipment
http://www.xs4all.nl/~ganswijk/chipd...r/cxa1645m.txt
http://arakon.hn.org/co_SVideo.html
connect pin 15 of the 1645 to a 75 ohm resistor, and the resistor to the Chrominance pin on the socket. connect pin 16 to the Luminance pin, also with a resistor. connect GND of the socket to pin 1 on the 1645.
if you get no picture or weird green lines, try swapping the C and Y pins.
the hardest part is actually attaching the damn socket to the case. plenty of hotglue will help.. and watch the space, there's very little in a genny 3. I suggest the right side, not the back as I used.. I had to, since my right side already has a 50/60 Hz switch and a headphone socket."
"it IS possible, but you need an additional circuit. the 1145 in the genny 1 outputs s-video, but needs a timing circuit for it to be usable. "
most of that stuff is for model 2/3 this is for model 1
here goes.
you need:
1 s-video socket
1 220 uf capacitor (axial or radial doesn't matter)
1 100 uf capacitor
1 75 ohm resistor
3 pieces of wire
the Sony CXA 1145 is located below the heatsink close to the AV port. be careful when removing that one, the screws are damn tight.
locate pins 15+16. the spot in the top left of the chip marks pin 1.
if neccessary, bend the caps nearby CAREFULLY out of the way.
Connect the + side (unmarked, usually only the - side has a large - sign above the pin on the cap) of the 220 uf cap to pin 16 of the chip. be carefuly that you don't touch the other caps too long. now solder one end of the resistor to the - pin of the 220 uf cap, and a wire to the other end of the resistor.
now connect the + side of the 100 uf cap to pin 15 of the chip. attach a wire to the - side.
solder the 3rd wire to pin 1 or 24 of the chip now.
I recommend bending the caps so they lie flat on the chip, WITHOUT touching any other components or each other on any blank parts. I also highly recommend using a bit of hotglue to keep them in place. if you don't have a hotglue gun, use some tape.
now connect the wires to the s-video socket. if you don't get any pic or a distorted pic, try swapping the C and Y pins on the socket.
that's it.
I suggest attaching the socket behind the cart slot, there's plenty of space there.
this mod also should work the very same way on the model 2 genesis with 1145 instead of 1645, and also the SMS as it uses the same encoder.
buy rite..........
I'll pass.
Anyone else?
edited with more info. apparently with the converter you are hooking it up via s-video but the quality remains composite.
Jesus, I should really look into getting a soldering iron.....
If a mod is the only option, to Matt I will go. :)
Matt can do it for you. He modded my model 2 for s-video, stereo, and imports. Very cheap, highly professional work, and an all around great guy to deal with.
Modding RGB for S-Video makes Baby Jesus cry.
I've discussed this ad nauseum with Matt and only very few 2s are moddable for s-vid. 3s are easy but you can't get stereo out of them.Quote:
Originally Posted by Melf
When the time is right I will send him my CDX for a mod, but standalone Gennys can be quite the hassle in this regard.
That's because not all model 2s have a compatible video processor (or some such thing). I was lucky to have a compatible one.
SC didn't specify what model he had though. I wonder if a model 1 is easier to mod. A modded CDX would rock though.
no a model 1 is supposed to be even harder.
a cdx period would rock :)