Super Gameboy

Blogs relating to the Super Gameboy build.

The Gameboy hacks begin!

Posted by on Mar 4, 2014 in Super Gameboy

The Gameboy hacks begin!

As mentioned here. Mike over at www.fpgaarcade.com is helping us make our Gameboy project a reality. He sent use a picture today that got our attention! here’s what he had to say; I’ve attached the victim to a Replay board and captured the video signal. The picture below is a bit fuzzy, but I had to add small resistors to protect the FPGA from the 5V signals.  The next step is probably to remove the gameboy crystal and send a clock over from the Replay PLL. This will allow me to lock the VGA and the gameboy video together to avoid any tearing. Mike is using a FPGA he developed himself……. check it out...

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The Gameboy VGA struggle

Posted by on Dec 23, 2013 in Super Gameboy

The Gameboy VGA struggle

The Gameboy VGA struggle As some of the Gameboy project followers are aware. One of our main concerns was how to output the Gameboy’s screen to a VGA monitor. This has given us a major headache, as we simply having no idea (at all) how to do this. We searched the internet hi and low and found nothing but “dead-end” projects. We finally stumbled across this gem of a site; http://www.fpgaarcade.com/ The owner of the site (AKA Mike), is in the progress of developing and manufacturing a FPGA board designed specifically for the gaming/Arcade community. The “Replay” board. This board is simply amazing, if you technical ability allows you (which mine doesn’t). You could run a Gameboy Core directly from the board (no emulation) and then out to VGA/DVI. You can even add a filter to edit the way the output is displayed. This will allow the Gameboy’s DMG screen to be displayed pixel perfect on a larger format screen, complete with green tint and pixels!. For the Gameboy project however, we just need the replay’s ability to output to VGA, as we’re running to original Gameboy hardware. The board can capture the Gameboys video signal, then using the onboard Xilinx Spartan 3E FPGA, it can be outputted using the DVI port. After posting for help on mikes forum. We received a number of replies from some of the helpful members there. Mike also replied after seeing the project. And offered not only loan us a “development board”, but too also offer his skills to help solve our screen dilemma! Putting the Gameboy project aside for the moment. I’m amazed i haven’t seen this board on the various “Arcade/Retro Gaming” based forums we visit (maybe im blind). The potential for it’s use is huge. It also has a expansion slot for use with an upcoming JAMMA connector, i can see that becoming very useful for people looking to replace damaged boards. Or people looking to create an authentic feeling repro arcade. Although i don’t think it’s possible yet (unless Mike corrects me). I’ve already fantasied about having the REPLAY as a dedicated board in our “bare bone cabs” (which aren’t in production yet). i can see it now…..dedicated rewritten Genesis\MegaDrive Core….. with a basic “frontend”. Then it pulls the video snaps and your roms from the SDcard slot! or even a “mulit system” Replay board, complete with keyboard encoder and with modulor CORES.That’s then able to pull your roms from the SDslot. There’s a hole in the market, bye bye 60 in 1 boards! You can find more detail about the Replay board at mikes website. I hope some of you find it useful. http://www.fpgaarcade.com/ I’d also like to take this opportunity to thank Mike and the community over at fpgaarcade.com/ for not only showing interest in the project. But for offering their time and skills to help make...

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Monitor Output

Posted by on Nov 30, 2013 in Super Gameboy

Monitor Output

One of the main hurdles we face (from a electronics point of view at least). Was how to out put the Gameboy’s screen to a VGA monitor. We have two options here. One is to simply use a PC with a Gameboy emulator (easy but effective). Or…. Hack the original hardware to output a VGA signal. It’s very difficult to do this, especially if you have no experience with FPGAs or oscilloscopes. In the screen shots below you find a screenshot from a PC running an emulator. This has had a special filter applied to try and emulate the original screen. The other pic is of the wiring diagram for the Gamboy’s video display! Something NASA wrote. The emulated...

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Switch V2.0

Posted by on Nov 20, 2013 in Super Gameboy

Switch V2.0

After some feedback from some of our fans, We decided to redesign the power switch. We already had the sliding feature, So we instead removed the push button and made the slider toggle power ON and OFF. We then also added the TFT bracket. Button removed. And redesigned. Micro switched added. In the ON position. Top view OFF. Top view ON. And the TFT...

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