DMG/Pocket video capture with Arduino or Teensy? (Page 14) - Nintendo Handhelds - Forums

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CA

One thing I still would like to try though is modifying an SGB to receive video data and sound from a DMG or Pocket. Do you guys know has anyone documented this mod?

212 Jul 17, 2014 8:02 am

rvan

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friendofmegaman wrote:

One thing I still would like to try though is modifying an SGB to receive video data and sound from a DMG or Pocket. Do you guys know has anyone documented this mod?

Just put the cartridge in the SGB. More seriously, though... The SGB Schematic is probably the most useful document, although I don't claim to understand every piece of it. The ICD2-R will be the chip you're interested in. Timbob's SGB LCD Mod might be worth a read too.

One thing I'm interested in is how much of the SNES's hardware is necessary to get composite video out of the SGB.

213 Jul 17, 2014 9:34 am

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rvan wrote:

friendofmegaman wrote:
One thing I still would like to try though is modifying an SGB to receive video data and sound from a DMG or Pocket. Do you guys know has anyone documented this mod?
Just put the cartridge in the SGB. More seriously, though... The SGB Schematic is probably the most useful document, although I don't claim to understand every piece of it. The ICD2-R will be the chip you're interested in. Timbob's SGB LCD Mod might be worth a read too.
One thing I'm interested in is how much of the SNES's hardware is necessary to get composite video out of the SGB.

It shouldn't be that hard to create something like that. since the dmg and sgb are basically the same hardware... you'd have to do something reversed of what i did in that thread, run the game on a dmg and send the datapins to the sgb, cutting of the internal data..

I know this may be easier said then done tho

214 Jul 17, 2014 11:56 am

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Michigan

But doing that would still require an SGB and SNES, in which case it would just be easier to mod the GB buttons to act as an SNES controller.

215 Jul 17, 2014 12:26 pm

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Jazzmarazz wrote:

But doing that would still require an SGB and SNES, in which case it would just be easier to mod the GB buttons to act as an SNES controller.

Depends on what your goal is. If it's just for using a DMG or pocket instead of a snes controller, then yes.

If you want to play games on the DMG, but want a copy of the screen sent to the snes for say, a workshop, then no.

216 Jul 17, 2014 12:29 pm

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Wait... Thinking abou that second option more.. It would be easier to put the game in a SGB, and send video data to a gameboy...
And link the buttons as well.

With some mods, you could still use it as a stand alone.

217 Jul 17, 2014 8:15 pm

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CA

I agree with Jazz that this is not the very best of ideas I'm just curious to pull it off for the sake of it.

Timbob wrote:

If you want to play games on the DMG, but want a copy of the screen sent to the snes for say, a workshop, then no.

Yah, actually I was hoping to achieve exactly that. Not for a workshop of course, but for LSDJing on big screen without patching LSDJ to be in tune with other instruments (since SGB has slightly different frequency)... Why is it not possible? I thought NeX has done something like that hasn't he?

Also I wasn't aware about Timbob's SBG to DMG LCD mod. It's brilliant - thanks for sharing!

But yah, I'm moving away from the original idea of video capture. I should discipline myself and get back on track.

218 Jul 17, 2014 9:23 pm

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Michigan

Timbob, did you ever build that LCD directly into the SGB? I suspect you could pull a power board from a gameboy to get VEE.

219 Jul 17, 2014 9:50 pm

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Jazzmarazz wrote:

Timbob, did you ever build that LCD directly into the SGB? I suspect you could pull a power board from a gameboy to get VEE.

Yeah, later on in that thread you can see I used a power board from a gameboy and made it more stand alone. Never got around to building a cart with screen in one, but it's going to happen one dat

friendofmegaman wrote:

I agree with Jazz that this is not the very best of ideas I'm just curious to pull it off for the sake of it.
Timbob wrote:
If you want to play games on the DMG, but want a copy of the screen sent to the snes for say, a workshop, then no.
Yah, actually I was hoping to achieve exactly that. Not for a workshop of course, but for LSDJing on big screen without patching LSDJ to be in tune with other instruments (since SGB has slightly different frequency)... Why is it not possible? I thought NeX has done something like that hasn't he?
Also I wasn't aware about Timbob's SBG to DMG LCD mod. It's brilliant - thanks for sharing!
But yah, I'm moving away from the original idea of video capture. I should discipline myself and get back on track.

Lsdj does have a build in frequency table to compensate for the different timing on a snes tho. So it should sound the same. Although I don't know if it would effect table speed etc...

220 Jul 17, 2014 10:02 pm

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CA

So I read through the whole thread to recap everything that has been done.

My current thoughts:
1. I'm gonna stick to original idea of DMG/Pocket to computer.
2. I need to check with one of my co-workers (who turned out to be competent in FPGA) what kind of board is needed to pull off video capture. I'll let you know what board I'll have ordered and dump all the info here.

221 Jul 17, 2014 10:18 pm

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Michigan

friendofmegaman wrote:

So I read through the whole thread to recap everything that has been done.
My current thoughts:
1. I'm gonna stick to original idea of DMG/Pocket to computer.
2. I need to check with one of my co-workers (who turned out to be competent in FPGA) what kind of board is needed to pull off video capture. I'll let you know what board I'll have ordered and dump all the info here.

Awesome. There are boards that have VGA built-in, which is what I personally want to get out of this project. I understand that you want to get video on a PC< but I want video on a TV or monitor. Different hopes, but the same goal.

222 Jul 17, 2014 10:41 pm

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CA

Jazzmarazz wrote:

friendofmegaman wrote:
So I read through the whole thread to recap everything that has been done.
My current thoughts:
1. I'm gonna stick to original idea of DMG/Pocket to computer.
2. I need to check with one of my co-workers (who turned out to be competent in FPGA) what kind of board is needed to pull off video capture. I'll let you know what board I'll have ordered and dump all the info here.
Awesome. There are boards that have VGA built-in, which is what I personally want to get out of this project. I understand that you want to get video on a PC< but I want video on a TV or monitor. Different hopes, but the same goal.

That's exactly what I'm hoping for to get. Since FPGA is so powerful and I decided to invest my time into learning it I'd like to take as much as possible.

Ideally I'd like to have some serial interface to send data to pc via USB, VGA and composite. HDMI would be great also, but I know nothing about it... but if it's easy to implement then I'm up to. And plus I'd like some controller input to completely desktopify a DMG.

But first - DMG->PC.

Did you already order the board? What are your thoughts on the FPGA brand you'd like to get and language to program it?

If you haven't ordered it yet we could look into pros and cons of different boards and order the same thing so that we could share the work. That would be perfect IMO.

223 Jul 17, 2014 10:50 pm

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Michigan

I already have a cheap board, but with no VGA. I tried to program something in Verilog once, but my idea was too great for an FPGA to handle. I had about 1000 switch cases, and this just killed any hopes of programming it to the FPGA.

Basically, I was trying to have the FPGA act as a ROM, and this would have worked if the data in said ROM was smaller. 1Kbytes was much too large for any FPGA to handle, at least any FPGA available to me.

Last edited by Jazzmarazz (Jul 17, 2014 10:51 pm)

224 Jul 18, 2014 12:07 am