Category Archives: Wonder Project!

New WonderSwan information, thanks WonderWitch!

Hello everynone!

Here is the great new, I was finally be able to correctly and cleanly dump a WonderWitch (without any hardware modification)! As you may know there is no known dump of the WonderWitchon internet, at least none I’me aware of. Anyway no emulator are really able to correctly support the WonderWitch. The only one that is “near” is oswan173, but there is no way to use it after as there is no serial port emulation, and I suspect that it does not correctly emulate the SRAM part as the WonderWitch use much more SRAM than standard game.

Also, don’t ask, I will not provide the dump for obvious copyright reasons.

But why I speak about this? Because the WonderWitch will allow me (and you also) to know more about the WonderSwan.

Continue reading New WonderSwan information, thanks WonderWitch!

Call for donation

Hi everyone!

I’m searching for dead WonderSwan (when I say dead I mean really non working unit) whatever the version it is (B&W, Color, Crystal), to be able to go further on my project, if you have one that you want to give, don’t hesitate to leave me a comment, I will contact you back to define where to send it 🙂

A color/crystal with a non broken screen will be a plus, but it’s not that important.

The goal it to get the cart connector from the device, and try to transform the device as an emulator remote for a future project…

Thank you in advance for you help 🙂

Wonder Project!

 A few month ago, I was speaking with friend about the marvelous Bandai’s WonderSwan, about making something that is missing for now on the platform: Flash Carts.

But before going more on the subject, I will give you some clues on the WonderSwan, and why it can be so attractive, even if it didn’t went out of Japan.

The WonderSwan is the last video game console made by Bandai, and it was at first a project of Yokoi Gunpei just before his tragic death. This handled game console was in direct line with the Gunpei’s leitmotiv: “Lateral thinking of obsolete technologies”

All his life he try to make the cheapest possible device, without lowering the quality, and this by using “old” technology and by finding a new way to use them. The Wii Remote, is an example, but the GameBoy too, or even the Nintendo DS, they use “obsolete” technology in them, but with modern goal.

There is too much to say on this and could make a full article, but the WonderSwan was made with this idea. When you look at the specs of the CPU of first model, a NEC V30MZ (a clone of the 8086), and when you think that the first WonderSwan was out in Japan in 1999 this look a bit old. But this come at a big price: the device cost was awfully low compared to competition, it was sold at ¥6800 (~$60 / ~50€) when the GameBoy Color cost at least the double or the triple. The other major advantage of the WonderSwan was it’s autonomy: ~30-40Hr … with only ONE AA battery!

The first model was only black and white, like the original GameBoy, and two other version come later, the WonderSwan Color (2000) and the WonderSwan Cristal (2002) with for both a color screen (241 color out of 4096) more RAM (512KB) and for the later a better screen: a TFT LCD instead of a FSTN one used on previous models.

All of thoses models comme in multiple standard colors, and it is, maybe, the video game console with the most special edition I ever see.

So our main problem here is that the WonderSwan use, on each cartridge, a custom chip named Bandai2001 or Bandai2003 and some of its function are still unknown.

Continue reading Wonder Project!