The SGB CPU is compatible with the DMG. By swapping the CPU, your Gameboy will skip the falling Nintendo animation. This decreases the boot speed.

What's everyone playing? I'm enjoying Mr. Driller for the GBC.

Thought I would show this off here too.

This was my first attempt doing a trace repair on a HDMI port. Seems like everything seems to be working after replacing those caps as well. Played through the tutorial of gears 5 with no issues.

What I've tested:

1. Playing downloaded game
2. Playing a Blu-ray
3. Playing on a 4k TV and 1440 monitor. This one the auto detect preferred 120hz 1080p but manually selecting resolution works great.

What I've learned:

1. Wired all the pads before soldering the port. I attached the front wires after the port was soldered. Should have just done them all.
2. A cheap grinding pen is so much easier to use than a knife to expose the traces.
3. 0201 are very hard to work with.

Picked up this Series X to do a trace repair for the hdmi, turns out 2 caps were ripped off the board as well. The one was still partially connected and easy to bodge. The second circled is missing. I'm curious if anyone knows the replacement value.

The similar caps in the area all read between 18.6 to 19.6 uf when out of circuit, so it could be a few values (though no guarantee this cap wasn't unique and completely different).

. 3 MBC1, 1 MBC3, and 1 MBC30

I happen to have a board from my FunnyPlaying build so I figured I'd give it a shot. Used enamel wire to make the button contacts and got 3.3v from the cart slot. I also removed the caps as to not power any circuits that didn't need (CPU and RAM were donors to the other board). Power is provided via AA batteries.

Still very much a work in progress but it works reasonably well (about 8ms of lag). I want to ultimately create an easier to install PCB rather than the perfboard I used.

An update to my previous post. I was able to improive the average lag by disabling the serial monitor, passing a reference of the controller to the polling logic (eliminating the need to loop over the current state and previous state to determine if buttons should be pressed), and adding a 1ms delay between loops (should have realized that the board need some down time between calls). I've added the code since I think 8ms is a perfectly good lag result for a diy project.

Took a badly marginal gba pcb and transplanted the CPU and RAM into this new motherboard. The soldering was a nice challenge but I had an issue with the cart slot. A pin was bent, so had to fix that before games would boot. Very happy with the result. I've uploaded a picture of the back of the shell as well. https://imgur.com/a/opXFA5B

Also in person, the plastic is not cloudy at all. The motherboard is here https://funnyplaying.com/products/gba-custom-upgraded-motherboard-replacement?variant=40990162059325

cross-posted from: https://lemmy.world/post/13199828

Printed using hatchbox wood pla. I had a few issues with standoffs but a little glue fix those right up. I'm very happy with the way it turned out. Just waiting on the release of flippy drive to call it complete.

Links to all the models I used:

https://www.thingiverse.com/tessa-wolf/designs https://www.printables.com/model/469283-gamecube-jewel https://www.printables.com/model/117561-gamecube-power-button https://www.printables.com/model/280005-gamecube-reset-button https://www.thingiverse.com/thing:2644517

Printed using hatchbox wood pla. I had a few issues with standoffs but a little glue fix those right up. I'm very happy with the way it turned out. Just waiting on the release of flippy drive to call it complete.

Links to all the models I used:

https://www.thingiverse.com/tessa-wolf/designs https://www.printables.com/model/469283-gamecube-jewel https://www.printables.com/model/117561-gamecube-power-button https://www.printables.com/model/280005-gamecube-reset-button https://www.thingiverse.com/thing:2644517