ɖҿϝիɟթվ created this project to play arcade games on the Micro:bit:
The Micro:bit is a pretty decent platform for teaching kids to program, but you can’t really make arcade-style games for it. You only have two buttons and a 5×5 display. Perhaps enough for a very small snake game, but that’s pretty much it. That’s why I started working on #PewPew FeatherWing as an alternative platform, but at some point I started wondering if it’s really impossible to do it on the micro:bit.
When the most recent version of micropython got the ability to use any pins for I2C, I realized that I can finally connect a display easily. I could use a HT16K33 and a 8×8 LED matrix like on the PewPew, but I decided to try something else — a monochrome OLED display, similar to the one used on many Arduino-based game consoles.
From the Next Thing Co blog:
Community Made: Groboy is a DIY Gaming Handheld Powered by C.H.I.P. Pro
Groboy, created by Groguard, is a C.H.I.P. Pro-powered handheld system designed to run retro console emulators and games on the go.
It’s also a testament to the open source community, readily available data sheets and manufacturing houses, and the tenacity to teach yourself engineering. Groguard, like many of us, is self-taught and pursuing his passion for making through custom projects.
After 4 revisions of the board, Groguard had the design where he wanted it. The custom OSH Park PCB at the heart of Groboy routes signal lines from the 2.8″ TFT display, headphones jack, internal 2500mAh LiPo battery (he estimates 3-5 hours of battery life, though he’s not rigorously tested it), and the PCA9555 I2C GPIO expander, which manages inputs from the 11 onboard buttons, to the respective input and output pins on C.H.I.P. Pro.
From Frank Buss on hackaday.io:
This is my first version of a PCB for building a Vectrex cartridge. I used this for my Kickstarter project for the Bloxorz game. The PCB was manufactured by @oshpark , you can order your board here.
It fits in this 3D printed case from Thingiverse (you can order it here in my Shapeways shop), or in one of the nice new injection molded cartridge shells from Sean Kelly
Frank has launched a Kickstarter campaign:
A puzzle game for the Vectrex, including a version with Vectrex graphics for PC, Mac, iOS and Android
FrankBuss has shared the board on OSH Park:
Up till now I haven’t seen a 6502-based board, and now I’m seeing both at once—a 6502-based expansion board for a Z80-based homebrew computer. Ben Chong, over at Ancient Computing, has done a lot of work around Spencer Owen’s RC2014 Z80 microcomputer kit, including designing an improved Z80 processor card and a 16550 UART board.
the 6502-based CPU board he’s put together is by far the most impressive. On his site Ben outlines his design process, and deep dives into how he got a 6502-based card to talk to a Z80-based system. This isn’t a trivial feat as the two processors have very different design philosophies—with the 6502 using a strict synchronous bus, and the Z80 using a loosely asynchronous bus. He then talks about software before doing some crude performance testing.
The hardware design files are available on GitHub:
ancientcomputing has also shared many projects on OSH Park:
From Bryan Cockfield on the Hackaday log:
With its backlit color screen and Master System compatibility, the Game Gear was years ahead of its main competition. The major downside was that it tore through alkaline batteries quickly, and for that reason the cheaper but less equipped Game Boy was still able to compete. Since we live in the future, however, the Game Gear has received new life with many modifications that address its shortcomings, including this latest one that adds an HDMI output.
Here is a video of it in action:
Very early prototype using my GBA HDMI board to get a 1280x720p output from the Game Gear.
The custom PCB uses a Spartan6 FPGA to convert the Game Gear’s 160×144 12-bit RGB video into a 1280x720p HDMI output using a 4x integer scale. HDMI video is generated directly from the FPGA, audio is taken from the Game Gear’s headphone jack.
It has some pixel glitches, but it could be due to the wiring as it’s very sensitive to positioning. The Game Gear was bought as a “broken” unit and is in need of a cap replacement, that could also be causing issues.