After looking at the DMG schematics, i got the idea to bypass the whole audio path of the gameboy and recreate my own output to see if we can get a better sound.
The idea behind this is to get better 'pro-sound' output whit more BASS, because the DMG 1uF coupling caps will kill all deep bass.
I saw somewhere that a trick was to short the 1uF caps, but was a quite strange way of doing this because you will get the DC offset directly in the phone amp.
So my way of doing a prosound is connect directly at the CPU output (easier to solder directly before the 1uf caps) and add another circuit for DC coupling and High Z output leaving the original circuitry for headphone and speaker intact.
Schematics will come soon .
Results : As expected, we get a much better bass response, for bass i mean sub bass(20-50Hz)
Some audio examples from LSDJ with associated the frequency analysis
I've tested with the same 'song' each time with the classic prosound (pre-pot) and with my new pro-sound version using different caps value.
Prosound output directly connectin to my Mac internal input and saved without any compression (PCM 16bit ). No sound post processing.
Sorry for the 'song' but is only a Bass test, not a full track as i don't know LSDJ that much
Sound example Original Prosound
Using Pre-Pot Classic Prosound on DMG-01
Original Prosound Spectrum analysis :
Peak 36 Hz = -21.2dB
Sound example noizeInaBox Prosound using 2u2 Cap
noizeInaBox Prosound 2u2 Cap
Prosound using 2u2 Spectrum analysis :
Peak 36Hz = -17.9dB .. +3.3dB than orignal prosound . yeah . i like sub bass
Sound example noizeInaBox Prosound using 10u Cap :
noizeInaBox Prosound 10u Cap
Prosound using 10u Spectrum analysis :
Peak 36Hz = -17.6dB .. +3.6dB than orignal prosound . yeah . will buy a subwoofer :)
Sound example noizeInaBox Prosound using 100u Cap
noizeInaBox Prosound 100u
Prosound using 100u Spectrum analysis :
Peak 36Hz = -17.8dB .. +3.4dB than orignal prosound . nothing more .
I know the spectrum analysis look quite identical,but look closer at the lower frequencies (20-50Hz) and remember that 3dB more is like double power.
In order to do some better testing, i needed to use white noise, luckily the Gameboy got a noise channel so i tried the same spectrum analysis using the Gameboy white noise (white noise normally is all frequencies in the same time at same level) :
Original Prosound using white noise Spectrum analysis:
50Hz = -44dB .. look at 20Hz .
noizeInaBox Prosound 10u cap using white noise Spectrum analysis:
50 Hz = -41dB +3dB than orignal prosound and re look at 20 Hz.
noizeInaBox Prosound 100u cap using white noise Spectrum analysis:
50 Hz = -41dB +3.dB than orignal prosound
My Conclusion :
Will build my nexts prosounds using my circuit because i like deep bass. i think the selected cap value will be 10u because you don't gain anything more with a bigger cap.
Another remark.if there is some low freq. noise, they will not be filtered with this prosound.
This method need more testing because it is only the first tests, but look good .
Didn't tested yet if this affect in any way the headphone or speaker output.
And remember that is is only for 'enhance' sub bass
As it need more components, i will do a SMT PCB with some Oxicaps.
If it works fine, you will see soon on the market the noizeinabox prosound pcbmount
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Includes open source DMG and CGB boot ROMs: Complete support for (and documentation of) all game-specific palettes in the CGB boot ROM, for accurate emulation of Gameboy games on a Gameboy Color; Supports manual palette selection with key combinations, with 4 additional new palettes (A. The Ultimate Guide to Creating Chiptunes on the GameBoy!: New to the Gameboy 'Chiptune' Scene? Or maybe your still trying to get to the bottom of what this whole Chiptune thing is? No matter your situation, by the end of this Instructable, I can promise you'll be a pro! Relatively new to the 'LSDJ' sc. Game Boy Games That Pushed The Limits of Graphics & Sound. And finally, the last channel is a white noise generator, responsible for a majority of the percussion and sound effects you’ll hear. While it’s upsetting that a majority of early Game Boy composers didn’t fully utilize these capabilities, we’ll be hearing some surprising.

By Ack, Noiseredux, and Zen Albatross
Check out other Guides in the Retro Gaming 101 Series

New Full Housing Shell Cover Case Pack with Screwdriver for Nintendo Gameboy Classic/Original GB DMG-01 Repair Part-Clear White 5.0 out of 5 stars 1 $9.99 $ 9. Same for each individual Game Boy unit. The game R-Type doesn't: initialize wave RAM and thus relies on these. One set of values is: 84 40 43 AA 2D 78 92 3C 60 59 59 B0 34 B8 2E DA: On the Game Boy Color, the values are consistently: 00 FF 00 FF 00 FF 00 FF 00 FF 00 FF 00 FF 00 FF: Register Reading. Jan 24, 2019 Check out links below: Things I Use: - Screwdriver Set: - Soldering Iron: - Tool Box: - Camera.

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In 1989, Nintendo released the Game Boy, a grey brick of plastic with a green screen and only four audio channels. Nintendo’s leadership believed it would be popular. But it wasn’t just popular, it became a cultural icon. Now the Game Boy is one of the most easily recognized pieces of machinery in the entire world, Pokemon is a common household name, and nearly everyone and their mother has heard of Tetris. It is a testament to toymaker Gunpei Yokoi that his creation has brought so many years of laughter and joy to the people of the world. In the realm of video games, few machines can claim to have had the impact of the Game Boy, and fewer still can claim its longevity. Its legacy continues to inspire and to fill our hearts with wonder.

It should be noted that this piece focuses on the Game Boy, not the Game Boy Color or Game Boy Advance, though they are mentioned at several points. All three featured different hardware, bring different strengths to the table, and are important enough to warrant separate articles.

I would like to thank both Noiseredux and Zen Albatross for their help creating this article. Noiseredux is well known in the Racketboy community for his love and knowledge of the Game Boy and maintains a blog on the handheld at RFGeneration, while Zen Albatross has contributed in the past to Racketboy, including an excellent piece on the handheld’s 20th anniversary in 2009.

Background Information

  • The Game Boy was Nintendo’s second handheld idea and Gunpei Yokoi’s concept, modeled after his earlier Game & Watch line. The project was three years in development.
  • The Game Boy was released in Japan on April 21, 1989, in the USA on July 31, 1989, and in Europe on Sept. 28, 1990. In South Korea, where it was distributed by Hyundai, it was known as the Mini Comboy.
  • Between the Game Boy, Game Boy Pocket, and Game Boy Color, a combined 118.69 million units were sold worldwide.
  • Despite releasing at the same time as the more powerful Atari Lynx and a year before the Sega Game Gear, the Game Boy had a much lower price of $89.99, which helped it outsell the competition.
  • The handheld was also aided by its simple button layout, which was reminiscent of the NES controller.

Historical Relevance

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  • The Game Boy was the start of the Game Boy lineage, which included its release in 1989, the Game Boy Color in 1998 and the Game Boy Advance in 2001.
  • The Game Boy would feature a variety of popular titles, some of which would have a profound impact on gaming, including the likes of Tetris, Kirby’s Dreamland, Pokemon, and many, many more. Pokemon even made the aging handheld a bestseller again based on the hype, and during the troubled N64 era, the handheld RPG series would help keep Nintendo afloat while also showing the company that older technology can still dominate in sales, a trend continued with the Nintendo DS and the Wii.
  • When first shown a prototype in 1987, global Nintendo president Hiroshi Yamauchi believed the unit could sell 25 million units in three years. The unit did better than expected, selling 32 million units by the end of the three year deadline.
  • Following the release of music titles Nanoloop, by Oliver Wittchow, and Johan Kotlinski’s Little Sound DJ, the chiptunes community has taken a shine to the Game Boy, further increasing the handheld’s popularity and longevity.
  • In 2009, the Game Boy was inducted into the US National Toy Hall of Fame.
  • The Game Boy was also the best selling item created by Nintendo R&D1 head Gunpei Yokoi. Yokoi developed many popular items, such as the Ultra Hand, Game & Watch, R.O.B., popular series like Metroid and Kid Icarus, and even helped pioneer the D-Pad and develop the Beam Gun with Masayuki Uemura, a predecessor of the NES Zapper. After the Game Boy, Yokoi went on to develop the Virtual Boy before leaving Nintendo in 1996 and forming Koto Laboratories, where he made a deal with Bandai to help develop the Wonderswan before his tragic death on October 4, 1997.


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  • Long Battery Life: It was Gunpei Yokoi’s main concern to make the hardware light enough to not require excessive battery power. The original model boasted between 10 and 30 hours, far more than the Sega Game Gear, Atari Lynx, or other handhelds.
  • Region-Free: Nintendo started a tradition with the Game Boy of keeping their handhelds region-free, exponentially increasing the size of the Game Boy’s library.
  • Large Game Library: Almost every major franchise has appeared on the Game Boy through direct ports, exclusive sequels or side games.
  • Durability: The original Game Boy is incredibly tough. It’s not a common handheld to find broken in the wild, and repairs are usually relatively easy. Nintendo offered repair services for the handheld up until 2007.
  • Lineage: Thanks to backwards compatibility the Game Boy actually lived on until 2007 through the SNES Super Game Boy, the Game Boy Color, Game Boy Advance and the GameCube Game Boy Player.
  • Cheap: Besides a handful of elusive titles and imports, the Game Boy is an especially affordable console to collect for.
  • Multiplayer: As long as players both had the same game and a link cable, Game Boys could be hooked together for player vs. player action, swapping Pokemon, or other things, depending upon the game. A four player adapter was also manufactured, though it still requires players to have link cables.
  • Killer App Pack-In: The Game Boy debuted with Tetris, one of the most well known games ever and hands down one of the handheld’s killer apps.


  • Blurry Screen: The original Game Boy is infamous for its blurry dot-matrix screen that could often make too much action difficult to perceive.
  • Limited Color Palette: In aiming at a low-battery requirement, Yokoi opted to utilize only four shades to color the original Game Boy games. In some games this limitation made differentiating sprites rather difficult.
  • Bulky: The original Game Boy is heavy and far too big to fit in a pocket. This is of course where the somewhat affectionate nickname “the gray brick” originated.
  • Link Cables: Unfortunately link cables and four player adapters for multiplayer can fluctuate wildly in price, so you’ll have to pay a bit to play with others or hope someone else has the required cable.
  • Screen Replacements: While the handheld has a low failure rate and is quite durable, the screen has a chance for burnout and isn’t easy to replace if damaged.

Technical Specs

  • The Game Boy houses an 8-bit Sharp LR35902, similar to a Zilog Z80, with a clock speed of 4.194304 MHz.
  • The handheld uses 8 kB internal S-RAM and 8 kB Video RAM.
  • The screen size is 2.6 inches diagonally, with a resolution of 160×144. The max sprite size is 8×16, while the minimum is 8×8, on a screen which sports a mere 2-bit color palette. The image runs at 59.7 frames per second, or 61.1 on a Super Game Boy.
  • 4 AA batteries are needed for the required 6V 0.7W, though the Game Boy Pocket requires only 3V 0.7W from two AAA batteries.
  • The Game Boy puts out sound on 4 audio channels, each with 4-bit sound. There are two pulsewave channels, a wave channel providing basic soft-synth with a 32-bit sampler, and a white noise channel for percussion, ambience, and sound effects. While there is only one speaker, using headphones reveals that the grey brick puts out audio in stereo.

Hardware Variations

Original/Classic DMG-01
Of course, this is where it all started. The original grey brick is one of the most widely recognized and fondly remembered pieces of Nintendo hardware of all time.
Shop For Original Game Boy DMG-01 at eBay
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Play It Loud
Play It Loud was simply a paint job and a new ad campaign for Nintendo’s already successful system. The DMG shed its drab grey skin and re-released with a number of colored models. While this may have not been a particularly effective strategy in winning over hardcore fans of Sega’s Game Gear, Play It Loud was still instrumental in renewing interest in the Game Boy during the mid-90’s.
Shop For Play It Loud Game Boy at eBay
Shop For Play It Loud Game Boy at
Game Boy Pocket
Intent on turning ‘portable gaming’ into ‘pocket gaming’, Nintendo release the Game Boy Pocket. The hardware had no notable improvements, but was now shrunken down to fit inside a far more sensibly sized unit. The screen was much sharper and had its charming-yet-distracting green tint removed. The Game Boy link cable port was also changed, requiring links between Original Game Boy and Game Boy Pocket to use a converter.
Shop For Game Boy Pocket at eBay
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Game Boy Light
This variation of the Game Boy Pocket was never released outside of Japan and contained only one notable improvement: The inclusion of a backlit screen. The unit is often coveted by chiptune artists who typically use their systems to perform in dark venues. To this day, the model is still extremely difficult to find in the US, and lucky eBayers will oftentimes need to pay a harsh premium in order to attain this rare beauty.
Shop For Game Boy Light at eBay
Super Game Boy
Released in all regions, the Super Game Boy was an adapter for original Game Boy games and black Game Boy Color games which allowed them to be played via the Super Famicom/Super Nintendo on a television set. Some color customization options and game borders were built into the cartridge.
Shop For Super Game Boy at eBay
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Super Game Boy 2
A Japan-only redux of the Super Game Boy, the Super Game Boy 2 incorporated a link port, enabling multiplayer. New borders replaced the old ones built into the original model, and certain Japanese Game Boy games had special borders put in.
Shop For Super Game Boy 2 at eBay
Game Boy Player
This Nintendo Gamecube attachment allowed players to play Game Boy, Game Boy Color, and Game Boy Advance cartridges on the television, without the Super Game Boy’s enhancements. Read our full Game Boy Player guide to find out why it’s a highly recommended piece of hardware.
Shop For Game Boy Player at eBay
Shop For Game Boy Player at


Game Link Cable
These cables enabled Game Boys to connect to each other for multiplayer, as long as both players had the same game or compatible games. There were several different models, with a change in size resulting from the smaller ports on the Game Boy Pocket. Several other universal components, such as a split cable with both sizes, were released later on.
Four Player Adapter
A special link cable adapter, this enable four players to hook together for the few four-player Game Boy games, though three link cables were required beyond the adapter.
Shop For Game Boy 4 Player Adapter at eBay
Game Link Cable Adapter
Because of the difference in sizes for link ports on Game Boys and Game Boy Pockets, Nintendo released this adapter to enable the two to connect for multiplayer.
Game Boy Camera
A somewhat silly accessory that would take pixilated black-and-white pictures that could be displayed on the Game Boy.
Shop For Game Boy Camera at eBay
Shop For Game Boy Camera at
Game Boy Printer
Could be used to print out pictures from the Game Boy Camera on sticker-paper. Also used in later Game Boy Color titles to print out passwords, high scores and other things from select games.
Shop For Game Boy Printer at eBay
Shop For Game Boy Printer at
Battery Pack
Lasting about 4-5 hours between charges, with the ability to be recharged roughly 1000 times before a significant loss of effectiveness, the Battery Pack let Game Boy players continue to game without having to shell out for AA batteries over and over again. Unfortunately it was a bit bulky and heavy, but included a belt clip to help.
Cheat Devices
Though cheat devices have existed on virtually every system, they became almost essential for Game Boy enthusiasts due to the “collect ‘em all” hysteria. Devices like the Game Genie, Game Shark made it possible to instantly collect Pokemon that were hard or impossible to find.
Game Boy Pocket Sonar
This device from Bandai enabled the Game Boy to locate fish underwater via sonar for fishing. It also included a fishing mini game if nothing happens to be biting.
Shop For Game Boy Pocket Sonar at eBay
Konami Hyper Boy
This Japan-only item turns the Game Boy into a mini arcade, running off two D batteries to do so. The machine included a better speaker, magnifier, and a front light to better show the action.
Shop For Konami Hyper Boy at eBay
Sunsoft Sound Boy
A peripheral to improve the audio output of the Game Boy, the Sound Boy is basically a large speaker setup which plugs into the Game Boy’s headphone jack.
Shop For Sunsoft Sound Boy at eBay
Sunsoft Wide Boy
This item magnifies the Game Boy’s screen for a larger image that’s somewhat easier to see.
Shop For Sunsoft Wide Boy at eBay
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Game Library

The original Game Boy had a tremendous amount of games that popularized a number of franchises and brought many established ones to the portable gaming world for the first time. Popular games and series include Tetris, Super Mario Land Series, Wario Land Series, Pokemon series, Kirby, Final Fantasy Adventure, and many more. Here at Racketboy, we are planning on developing some additional Game Boy game guides, but here are a few excellent lists to look over:


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  • Visual Boy Advance emulates Game Boy, Game Boy Color, and Game Boy Advance ROMs and supports Super Game Boy borders. Versions for Windows, Linux, MacOS, and even BeOS have been created. VBA’s predecessor Visual Boy was another Game Boy and Game Boy Color emulator, which is now outdated as it was incorporated into Visual Boy Advance
  • BGB is another Game Boy, Game Boy Color, and Super Game Boy emulator for Windows which includes features like TCP/IP support.
  • TGB Dual also features Link Cable support via TCP/IP, but suffered due to only being available on Windows in Japanese. There’s an English version out now.
  • If you have a Nintendo DS, Lameboy is an excellent solution for that portable.
  • There are numerous more Game Boy emulators across various platforms and of varying quality, including KiGB, BasicBoy, PlayGuy, HEIG-boy, GEX, GEST, DreamGBC, GB ’97, the open source gnuboy, and much, much more. The Game Boy’s popularity has lead to a multitude of emulators to choose from, and game ROMs can be found online in droves.