The Nintendo Game Boy Color Is An Aircon Remote

April 29, 2020 by Jenny List 5 Comments

Those of you who are familiar with 1990s handheld consoles may recall that Nintendo’s Game Boy Color had an infra-red receiver and transmitter. The thought of a handheld computer with infra-red capabilities interested [jg], who immediately set about converting it into a remote control for an air conditioner.

The Game Boy doesn’t have dedicated infra-red remote control hardware, instead the IR diodes appear to be connected to I/O lines. Thus the bitstream bas to be bit-banged, and takes the processor’s entire attention when transmitting. The software is neatly placed on a reprogrammed bootleg cartridge.

It’s an interesting read in terms of the approach to reverse engineering, for example finding the parameters of 37 kHz infra-red remote control by trial and error rather than by a quick read up on the subject, or searching for information on National air conditioners and finding nothing, but not searching the National brand itself to find that a search on Panasonic air conditioners would likely give all the information needed. But the end result operates the appliance, so it’s good to record a success.

This isn’t the first time we’ve seen a Game Boy control something, though we can’t recall seeing another using the IR. Need a brilliant overview of the Game Boy? We’ve got you covered.

Thanks [Roel] for the tip.

Header image: Evan-Amos / Public domain.

Snakes And Ladders: Game Boy Emulator In Python

April 26, 2020 by Sven Gregori 3 Comments

If a Game Boy was a part of your childhood, you were probably more than once dreaming of spending your entire school day with it. Well, they had to wait a few more years for that, but eventually in 2015, [Asger], [baekalfen], and [troelsy] made that dream reality when they created a Game Boy emulator in Python for a university project. However, it didn’t stop there, and the emulator has since grown into a full-blown open source project, PyBoy, which just reached the version 1.0 release.

Since it started out as an academic project, the three of them had to do their research accordingly, so the background and theory about the Game Boy’s internal functionality and the emulator they wrote is summarized in a report published along with the source code. There is still some work to be done, and sadly there is no sound support implemented yet, but for the most part it’s fully functional and let’s you successfully play your own extracted cartridges, or any ROM file you happen to have in your possession.

Being an emulator, you can also inspect its inner life when run in debug mode, and watch the sprites, tiles, and data as you play, plus do cool things like play the emulation in reverse as shown in the clip below. Even more so, you can just load the instance in your own Python scripts, and start writing your own bots for your games — something’s we’ve seen in action for the NES before. And if you want to dive really deep into the world of the Game Boy, you should definitely watch the 33c3 talk about it.

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ESP32 Refines Game Boy Bluetooth Adapter

April 21, 2020 by Tom Nardi 6 Comments

Last year we brought word of a project from [Shyri Villar] that turned a stock Game Boy Advance into a Bluetooth controller by exploiting the system’s “multiboot” capability. The prototype hardware was a bit ungainly, but the concept was certainly promising. We’re now happy to report that the code has been ported over to the ESP32, making the project far more approachable.

To clarify, the ESP32 is now the only component required for those who want to play along at home. Just five wires connect the microcontroller to the GBA’s Link Cable connector, which is enough to transfer a small ROM over to the system and ferry user input to the Bluetooth hardware. Even if you aren’t interested in using it as a game controller, this project is an excellent example of how you can get your own code running on a completely stock GBA.

While the original version of the hardware was a scrap of perfboard dangling from the handheld’s expansion connector, reducing the part count to one meant [Shyri] was able to pack everything into a tidy enclosure. Specifically, a third party GBA to GameCube link cable. This not only provides a sleek case for the microcontroller that locks onto the handheld with spring loaded tabs, but also includes a male Link Cable connector you can salvage. It looks as though there’s a bit of plastic trimming involved to get the ESP32 to fit, but otherwise its a very clean installation.

The GBA will be 20 years old soon, but that doesn’t mean the hardware and software exploration is over. The original Game Boy is over 30, and people are still giving talks about it.

The Ultimate Game Boy Talk

March 14, 2020 by Elliot Williams 4 Comments

It is absolutely no exaggeration to say that [Michael Steil] gave the Ultimate Game Boy talk at the 33rd Chaos Communication Congress back in 2016. Watch it, and if you think that there’s been a better talk since then, post up in the comments and we’ll give you the hour back. (As soon as we get this time machine working…)

We were looking into the audio subsystem of the Game Boy a while back, and scouring the Internet for resources, when we ran across this talk. Not only does [Michael] do a perfect job of demonstrating the entire audio system, allowing you to write custom chiptunes at the register level if that’s your thing, but he also gets deep into the graphics engine. You’ll never look at a low-bit Pole Position clone the same again. The talk even includes some new (in 2016, anyway) hacks on the pixel pipeline in the last 15 minutes, and a quick review of the hacking tools and even the Game Boy camera.

Why do you care about the Game Boy? It’s probably the last/best 8-bit game machine that was made in mass production. You can get your hands on one, or a clone, for dirt cheap. And if you build a microcontroller-based cartridge, you can hack the whole thing non-destructively live, and in Python! Or emulate the whole shebang. Either way, when you’re done, you’ve got a portable demo of your hard work thanks to the Nintendo hardware. It makes the perfect retro project.

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There Really Was A Sewing Machine Controlled By A Game Boy

March 11, 2020 by Zoe Skyforest 13 Comments

These days, high-quality displays and powerful microcontrollers are cheap and plentiful. That wasn’t the case a couple of decades ago, and so engineers sometimes had to get creative. The result of this is products like the Jaguar nu.yell sewing machine, as covered by [Kelsey Lewin].

The later nuotto model was capable of more advanced embroidery patterns. A Mario character cartridge was sold, while a later Kirby edition was scrapped before release.

The Japanese market product eschewed the typical mechanical controls of the era, to instead interface with a Nintendo Game Boy. The sewing machine would hook up to the handheld console via the Link Port, while the user ran a special cartridge containing the control software. This would allow the user to select different stitch types, or embroider letters. Very much a product of its time, the nu yell mimics the then-cutting edge industrial design of the first-generation Apple iMac. The technology was later licensed to Singer, who brought it to the US under the name IZEK. Sales were poor, and the later Jaguar nuotto didn’t get a similar rebranding stateside.

Back in the late 90s, the Game Boy was likely an attractive package to engineers. Packing a Z80 processor, buttons, and a screen, it could act as a simple human interface in lieu of designing one from the ground up. Aprilia even used them to diagnose motorbike ECUs, and we’ve seen Game Boy parts used in medical hardware from the era, too. Video after the break.

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Micro-Sized Flex For Commercial Quality Bodging

July 29, 2019 by Kerry Scharfglass 9 Comments

We love watching the creativity unleashed by the democratization of once-exotic technologies. The casualness by which one can order a cheap, small run of PCBs has unlocked a flood of fine pitch components and projects which look commercial quality even with a total build volume of one. Now the once mythical flex PCB has been falling from it’s stratospheric pricing and with OSHPark’s offering it feels like we’re at the inflection point. [qwertymodo] leveraged this by creating a beautifully twisted flex to add link port support to the Super Game Boy

In the mid-90’s Nintendo released the Super Game Boy, a cartridge for the SNES which allowed you to play Game Boy games on the big screen. Each cartridge was in fact an entire Game Boy with the appropriate hardware to present it in a way the host console could interface with, but missing some of the hardware a standalone Game Boy would include like a link port to connect it to another system. This mod fixes this limitation by bridging the correct pins out from the CPU to a breakout board which includes the link port connector. For general background on what’s going on here, check out [Brian]’s article from April describing a different mod [qwertymodo] executed to the same system.

What’s fascinating is how elegant the mod is. Using a a flex here to create a completely custom, strangely shaped, one-of-a-kind adapter for this random IC, in low volume is an awesome example of the use of advanced manufacturing techniques to take our hacks to the next level. It reminds us a little of the method [Scotty] used to add the headphone jack to his iPhone 7 back in 2017. At the time that seemed like a technology only available to hackers who could speak a little Mandarin and lived in Shenzhen.

Detailed information on this hack is a little spread out. There is slightly more info in these tweets, and if you have a Super Game Boy crying out for a link port the adapter flexes are sometimes available here. Look beyond the break to see what the mod originally looked like sans-flex.

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The Arduboy Gets A Crank Mod

July 2, 2019 by Brian Benchoff 10 Comments

You’ve seen VR headsets and wearable video game controllers and flight yokes and every other type and kind of video game controller, but a crank? Yes, the Arduboy now has a crank modification in tribute to (or blatant ripoff of) the PlayDate, a video game console created by Panic and Teenage Engineering.

The basis for this build is the Arduboy, a miniature game system the size of a credit card. This game console features candy-like buttons, compatibility with the Arduino IDE, and a community that has produced dozens of games already. Where there’s software developers there’s inevitably a few hardware engineers waiting in the wings, and this is no exception. [bateske] created a crank mod for the Arduboy that gives this miniature, toy-like game console a crank. Ready to write a bass fishing simulator? This is your shot.

The hardware for this build consists of a 360° rotary encoder for the internals of the device. For the handle, [bateske] found an interesting ‘premium grinder for herbs and spices’ on Amazon. Shockingly, this crank handle just sort of works with the rotary encoder.

As for games, this is a brand new user interface for the Arduboy game console, so of course there are some interesting possibilities. There’s a fishing simulator that’s more interesting than real fishing and something like Flappy Bird only instead of flapping it’s bouncing over bottomless pits. You can check out this crank console out below.

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