CrossZGB v2025.1 is out! A Game Engine for #GameBoy #SMS #GameGear #MegaDuck - Improved performance - Improved coroutines - Level maps larger than 256 tiles - Attribute maps for the SMS/GG - Persistent sprites - Linker files to allow for large projects - New examples github.com/gbdk-2020/Cr...

#GBDK 2020 v4.5.0 is out! - HRAM allocation + example - SRAM Bank new # pragma_dataseg - zx0 compression - png2asset fixes and features - Many other fixes & features New examples! - MBC5 Rumble - SNES NMI handler - #MegaDuck Printer github.com/gbdk-2020/gb... #gbdev #smsdev #nesdev

Woo! I've updated my #MegaDuck ROM patch on itch for Fydo's Magic Tiles to note that the source ROM is now **pay what you want**. 🎉 Recommend checking out this charming puzzle game for the Game Boy *and* Mega Duck. :) bbbbbr.itch.io/megaduck-pat...

#MegaDuck Super Junior Computer gets reversed! I invested several hours to pull "proper" schematics out of the PCBs and shared them on GitHub. During the process I also completely redrew the MainBaord PCB surrounding the CPU.

An obscure cpu clone of a #GameBoy won't support a system RTC date past 2011. Found this Y2K12 bug while disassembling the system ROM of the #MegaDuck laptop model. The hardware itself could do it, but I guess they didn't think anyone would still use the console 15 years later (made in ~1995)

The final leaderboard of the 'Game' category of #gbcompo25 was just published. Congratulations to OrmBlok, Fortune & Glory, Potion Panic, DropBlox! and Game of Life Kuzushi for winning the 'Best Games' awards! gbdev.io/gbcompo25.ht...

Late breakfast out and about. #gameboycamera #gameboy #photography

Dedication to the cause

Finally! External #MegaDuck Laptop HDMI based on #PicoDVI is working. This is pulled directly from @remysharp.com pico-dmg-arcade as I'm currently unable to compile working code myself. Need to figure out how, to add audio support though 😁

Lets get some Game Boy homebrew included on there

I've updated my Mega Duck ROM patch on itch for Nocptern to note that the source ROM is now **pay what you want**. 🎉 Cool #shmup for the Game Boy. Hope this means some more people enjoy the game on the #MegaDuck too :) bbbbbr.itch.io/megaduck-pat...

Andddd..... Here it is. Den Of Snakes Four Player, a family of public domain pixel fonts. Free download at: bbbbbr.itch.io/den-of-snake... #font #gameboy #pixelart #pixelfont

Den of GBBoys Checking compatibility. #GBBoy Seal of Approval earned. Even though their clocks run fast the game stays in sync due to how it uses the 4 Player adapter. Q: Is that older GBBoy Colour with a very scratched screen actually a color console? A: No! They just changed light grey to red!

Den of Snakes, a new homebrew game for the Four Player #GameBoy adapter. - Have a 4 Player adapter and play it? would love to see pix - Find bugs or problems? let me know Rom on Itch: bbbbbr.itch.io/den-of-snake... Open source: github.com/bbbbbr/gbdk-... #retrogaming #gbdev #nintendo #pixelart

My IPS mod for the #MegaDuck Super Junior Computer finally got a frame to hold the GBP Q5 display. It also locks against the adapter PCB and creates a good tight fit ^^ Now I need to find a nice way to access the OSD without the capacitive-pads (inconvenient)

Wait's over. We're about to reveal, entry by entry (and in no particular order), the final #gbcompo25 shortlist! Those 19 games will be the ones competing for prizes and they will be ranked in the final leaderboard. Stick around till the end of the thread… we have a special surprise for everyone!

Me: Trying to finish a (rather delayed) very basic game showing how to use the Game Boy 4-player adapter My brain: How about you make a new 8x8 pixel font just for this trivial game instead of finishing your code ... #font #gameboy #pixelart

I'm only an organizer for gb compo and not a judge, but I still try to play all the games. GB Compo entrants - I have now played through all ~119 of your games! Thank you for participating and making so many cool and delightful games / tools / music! Had a lot of fun! #gbcompo25 #gbcompo

#ZGB, #CrossZGB and #GBDK #GameBoy games in #gbcompo25: CrossZGB oshf.itch.io/tomato-do ZGB distractedcoder.itch.io/luigi-mansio... GBDK Entries retrobitninja.itch.io/bomb-tracker urbanzero.itch.io/bunkerboy thedarktiger.itch.io/crate-pusher dij.itch.io/d-u-b drludos.itch.io/dmg-vs-super... 1/3

What tools were used to make #gameboy games in #gbcompo25 ? Similar to previous compos + new tooling. - #gbstudio main share - #asm, #gbdk / C, #zgb a couple - New! #GBBasic #libgb++ #MatlabGB "Unknown" == likely #asm (#rgbds, #wladx, etc) Data using: github.com/bbbbbr/gbtoo... #retrodev #gbdev

The GB Compo Game Jam has finished! itch.io/jam/gbcompo25 119 entries! I’m on the judging panel again this year, looking forward to checking out everyone’s games!

Attention, #GBCompo25 participants! As we approach the final deadline, we’ve put together an "End of Compo" checklist to help you make sure everything is in order in your submission. itch.io/jam/gbcompo2... Good luck everyone!

New release of #gbtoolsid: 1.5.3 A command line & web app to id tools used to build #GameBoy ROMs (such as #GBDK, #GBStudio, etc) Changes: -Detect GBBasic 1.1 -Detect Cross ZGB 2025.0 -Detect Matlab GB Rom Creator Console: github.com/bbbbbr/gbtoo... Web: bbbbbr.github.io/gbtoolsid_web/ #gbdev

#Minesweeper on the #GameBoy as it was meant to be played 😎 Forked a open source #GBDK minesweeper by Alberto Cozzi to add #SuperNintendo Mouse support via the link port. github.com/bbbbbr/mine_...

Now #SNES mouse works on #GameBoy Color, Pocket, SGB2, etc with Clock-out inverted. Some FPGA clones don't, though Analogue Pocket is ok. The Hyperkin SNES mouse works too, with 1 byte offset. Movement is not as nice as Nintendo's, but useful since it's still being made. github.com/bbbbbr/gbdk_...

After a SNES Mouse the next logic step would be... a USB Mouse on #GameBoy. Modified the Inside Gadgets USB keyboard adapter firmware to work with a mouse. shop.insidegadgets.com/product/game... Open source #GBDK example: github.com/bbbbbr/gameb...

youtube.com/watch?v=e2PY... #petris #gbc #ngof

Now you can print GB-Wordyl results on Mega Duck Laptops! New release adds #MegaDuck thermal printer support, prob first homebrew to use the printer hardware. bbbbbr.itch.io/gb-wordyl/de... Can print in #SuperJuniorSameDuck emulator too. github.com/bbbbbr/Super... #retrogaming #gameboy #wordle

The Konami code is proving very popular among homebrew game devs (myself included) 😛

i hope this encourages more people to add cheats to their games if they haven't already 👀 it's a silly little thing that can add a lot of fun!

Know of *built-in* cheat/secret codes for *homebrew or indie* games on retro consoles? Send them my way. (mainly #gameboy, #nes, #gba for starters) Made a thing to catalog them. Lets try this and see what happens. (not covering game genie/shark type codes) bbbbbr.github.io/retro-homebr...

As might be expected, works for reading #SNES controllers over Link Port too. (at least, this one). On the screen are a bunch of sequential reads with different buttons pressed and their matching bits cleared. #GameBoy #SuperNintendo

Prompted by the paint demo below, taking a lil detour to try hooking a #SNES Mouse directly up to #GameBoy (snes controller protocol over link port). Commited a few crimes with the latch and clock polarity (signal inverter not here yet), but it still manages to ~work on a DMG. #gbdk #retrogaming

Now even better: #GameBoyCamera on #GameGear with Photo! ROM Toxa "Gentlemen, we have the Game Gear Camera! Game Boy to Game Gear cart adapter docs will be published as soon as they are ready. Beside the camera it allows to use the Game Boy carts for the Game Gear homebrew." x.com/un_toxa/stat...

Toxa pulled off a cool feat today - "Probably the first ever print on the Game Boy Printer from the Sega Game Gear. #gbprinter #gbcamera #gamegear" github.com/untoxa/gb-ph... (posting here since he's only on twitter)

Updated mid-2025 #GameBoy homebrew / indie Cart Releases charted by year/publisher. Still lots of small publishers / self published titles. Data scraped from: dmgpage.com/homebrew-rel... which is maintained by @dmgpage.bsky.social #gbdev #retrogaming #indiedev #retrodev

#GameBoy 4-Player adapter mysteries solved & working great. Now we have snakes, 4 of them! And synchronized game play across 4 consoles. Game mechanics still work in progress. Adapter interface code now open sourced & documented: github.com/bbbbbr/gbdk-... #gbdev #retrodev #retrogaming #megaduck

Welllll was a bit of a struggle (some ambiguity in docs and hardware sensitive to out of spec input)... but making progress. Can send and receive data from #GameBoy 4-Player adapter reliably to move some blobs in parallel. A couple mysteries remain to investigate. #gbdev #retrodev #retrogaming

The #megadrive #shmup zpf from kickstarter has arrived. It's fun, but hard (and i'm mediocre at shmups).

#Timelapse of clouds. #gameboycamera #gameboy #photography

Sunset and silhouette from the roof last night. #gameboycamera #gameboy #photography

#gbcompo25 has now started! The theme is... There is no theme this year, do whatever you want! Have a great time everyone!

Get your #GameBoy dev tools fired up! The #gbcompo25 game jam starts in 24 hours! We're excited to see the awesome Games, Music, Graphics, Demos and Tools the Game Boy community will make. itch.io/jam/gbcompo25 The cash and prizes pool is now over $5000! #gbcompo #gbdev #retrodev #retrogaming

4 days left until #gbcompo25 kicks off and we still have a few sponsor seats available (starting at $150). If you publish homebrew games and want to support the retro dev scene while showcasing your products and/or services, that's your perfect chance! Learn more about the event and reach out!

GBDK v4.4.0 is out, and contains several improvements for the NES platform, mainly focused on improved GB compatibility. highlights: * VBL/LCD ISR handlers use GB conventions and pseudo-registers * Timer interrupt emulation allows improved music playback * Tilemap functions wrap around correctly

CrossZGB v2025.0 is out! Game Engine for #GameBoy #SMS #GameGear #MegaDuck New features - Coroutines (cooperative multi-tasking for logic) - Custom build rules - Collision groups - Improved SMS/GG audio drivers - Var width font & Dynamic map examples - Features & fixes github.com/gbdk-2020/Cr...

#GBDK 2020 v4.4.0 is out! - Improved #NES support - SDCC 4.5 compiler - Added Linux ARM binaries - Many fixes & features New examples! - #MegaDuck Laptop hardware - Text Dialog @laroldsjunkyard.bsky.social - #GameBoy MBC7 Accelerometer & MBC3 RTC github.com/gbdk-2020/gb... #gbdev #smsdev #nesdev

#gbdk (and #bbstudio) is getting new NES tilemap layouts! By default we use 1-screen layout for simplicity - but this has scrolling artifacts. The NES can do better. 2kB VRAM allows H / V layout to limit artifacts. And cartridges can also provide VRAM for 4-screen layout to remove them completely

New release of #gbtoolsid 1.5.2 Console & web app to ID tools used to make #GameBoy ROMs Changes of last few versions: - Improve detection: #GBStudio, VGM2GBSFX, #GBDK, #GBBasic - Detect #GBSDK - Linux and Mac Arm64 builds Console: github.com/bbbbbr/gbtoo... Web: bbbbbr.github.io/gbtoolsid_web/