Gameboy Genius - posts tagged 'gameboy'

How not to fix dead horizontal lines on a DMG-01

Wed, 20 Jul 2011 23:27:27 GMT

How not to fix dead horizontal lines on a DMG-01

How not to fix dead horizontal lines on a DMG-01

Wed, 20 Jul 2011 23:27:11 GMT

How not to fix dead horizontal lines on a DMG-01

How not to fix dead horizontal lines on a DMG-01

Wed, 20 Jul 2011 23:26:57 GMT

How not to fix dead horizontal lines on a DMG-01

How not to fix dead horizontal lines on a DMG-01

Wed, 20 Jul 2011 23:26:44 GMT

How not to fix dead horizontal lines on a DMG-01

LittleFM 0.4 beta

Mon, 08 Nov 2010 23:12:47 GMT

LittleFM 0.4 beta
Read all about it! blog.gg8.se/wordpress/2010/11/09/public-release-of-little...

Roms Isos Dreamcast Isos Neo Geo Roms N64 Roms SNES Roms

Thu, 07 Oct 2010 23:00:45 GMT

http://www.rombay.com/

Gameboy music and development tool file archive screen shot

Tue, 14 Sep 2010 12:08:18 GMT

Gameboy music and development tool file archive screen shot
Browse here: gbdev.gg8.se/files/

Related blog post: blog.gg8.se/wordpress/2010/09/14/gameboy-development-and-...

Nonfinite RGB backlight

Thu, 01 Jul 2010 16:47:38 GMT

Nonfinite RGB backlight
Soon...

The Cutting Room Floor

Wed, 02 Jun 2010 21:57:45 GMT

Hidden stuff in games

http://wiki.rustedlogic.net/The_Cutting_Room_Floor

The Cutting Room Floor

Wed, 02 Jun 2010 21:57:45 GMT

Hidden stuff in games

http://wiki.rustedlogic.net/The_Cutting_Room_Floor

The real thing 4

Sat, 15 May 2010 09:30:59 GMT

The real thing 4

The real thing 3

Sat, 15 May 2010 09:30:34 GMT

The real thing 3

The real thing 2

Sat, 15 May 2010 09:30:09 GMT

The real thing 2

The real thing 1

Sat, 15 May 2010 09:29:41 GMT

The real thing 1

The real thing 0

Sat, 15 May 2010 09:29:15 GMT

The real thing 0

Emulation 4

Sat, 15 May 2010 09:21:48 GMT

Emulation 4

Emulation 2

Sat, 15 May 2010 09:21:47 GMT

Emulation 2

Emulation 3

Sat, 15 May 2010 09:21:47 GMT

Emulation 3

Emulation 1

Sat, 15 May 2010 09:21:46 GMT

Emulation 1

Emulation 0

Sat, 15 May 2010 09:21:44 GMT

Emulation 0

LittleFM on GBC

Sun, 07 Feb 2010 15:49:02 GMT

I finally felt motivated to work a little on LittleFM, and the next feature in the pipeline was (the comparitively small) feature of “real” GBC support, ie support for double speed and colour palettes in LSDj which LittleFM has been lacking so far. (Instead it used the oldschool compatibility mode which didn’t allow LSDj to take advantage of the higher CPU speed found in the GBC)

It works great and flashing takes about half the time when done in double speed mode, however I forgot to clear the secondary GBC bakground map when going from LSDj back into LFM, using the classic sel-start-B-A combo. What this means is that the colour pattern from LSDj will not be erased but remain on the screen. This gave this nice visual bug seen below. As you can see, the pattern resembles LSDj’s screen layout.

I’m going to finish one more feature before I release LittleFM 0.4, loading and saving of individual LSDj files, so LFM can truly replace the builtin file manager that comes with LSDj. I have an almost working version of this feature, but it has wrinkles which I want to iron out before releasing it.

The last picture is shitwave which actually looks marvellous with the backgrounds residue. It gives the vibrations more life and you can see what’s actually happenening rather than just vaguely vibrating lines. It may not be apparent on the still image, but it looks nice live.

Sorry for the long wait, but have patience!

LittleFM glitch on GBC

Sun, 07 Feb 2010 14:11:14 GMT

LittleFM glitch on GBC

LittleFM glitch on GBC

Sun, 07 Feb 2010 14:10:44 GMT

LittleFM glitch on GBC

LittleFM glitch on GBC

Sun, 07 Feb 2010 14:10:13 GMT

LittleFM glitch on GBC

New track: Nitrojazz

Tue, 26 Jan 2010 18:02:24 GMT

Time for some NES-eque and short but sweet Gameboy jazz. Listen at chipmusic.org.

http://chipmusic.org/nitro2k01/music/nitrojazz

Green Gameboy backlight

Sun, 06 Dec 2009 07:20:22 GMT

(Most photos have Flickr notes. If you click on any of the pictures, you’ll go to that photo’s Flickr page where you can watch notes for the photos that have them.)
I’ve playing around a lot with DMG backlight lately. After I tried out the inversion hack on my guinea pig boy, I installed the hack on my regular one as well, but without a switch, and flipped the polarization layer of course. (The whole point of the hack is to uninvert the screen after flipping the polarization layer) This gave it more contrast, but then Bibin gave me a tip that so called “kelly green” coloured LEDs would work perfectly for a DMG backlight when using the inverse polarization layout, since the dark areas would completely block that green wavelength, whereas a large portion of white light will pass through even the dark areas. I believe that “kelly green” is the same LED type as “true green”. The LEDs in this eBay auction are suitable for the job, if you want to build your own backlight using this method.

Compare the images below:

The left picture is a Nonfinite backlight with an inverted polarizer. (And of course a 74hc04 screen inverter to uninvert the image) It has white LEDs which is atcually a bad idea for use with a monochrome LCD. Light pixels will conduct all wavelengths of light pretty evenly. Dark pixels on the other hand block green light but will still pass through a considerable amount of blue light. Add to that the white LEDs commonly used are actually blue LEDs with phosphor to produce other wavelengths. Read about it on Wikipedia. Because of this, white LEDs will have a much higher concentration of blue light compared to other wavelengths, which doesn’t exactly help getting contrast and gives the dark areas this purple colour. When using the green LED on the other hand, you only get one wavelength of light, which is almost perfectly blocked by dark pixels, giving you great contrast.

LED circuit board

For this chapter of my epic eternal backlight saga I used three LEDs from a batch I recently acquired, combined with layers from a backlight taken from a broken laptop screen. The LEDs are surface mount 45° wide angle

I needed a circuit board to keep the LEDs in place. It seemed like a waste to make a printed board a one-off piece of such a simple board, so I simply cut the needed traces and soldered components onto a copper laminate. I connected it to the screen daughterboard with a relatively thick single strand wire which also keeps the board in position.

The layers

Green backlight for DMG Gameboy: The different layers

Sat, 05 Dec 2009 09:33:33 GMT

Green backlight for DMG Gameboy: The different layers