u/28_Daves_Later

Looks like cross posting doesnt work for this group and I'd posted about it in another wonderswan sub, but for anyone interested I've spent the last couple of months reverse engineering the Bandai SwanCrystal and it's nearing completion.

I bought a couple of corroded donors last year to have a go at myself or possibly donate to someone else more able to attack the project but after sitting in the todo pile for too long a friend prompted me to start the process at least.

I have to finalise a couple of things before ordering some test boards and a recent collaborator has been huge in helping to identify a few of the unknown or unlabelled components. If it works I might give yhe Wonderswan Color a go next.

I was intending to wait a little bit longer and have a working unit before I posted about it here, but I'm almost finished reverse engineering the SwanCrystal PCB and making a schematic for it.

About a year ago I bought 2 SwanCrystals that were listed as corroded and thought I would grab them and either attempt a reverse myself or donate to someone else I knew who could do it (time permitting)

They sat in my todo pile till a couple of months ago and a buddy prompted me to take them out and start the process of at least scanning a depopulated board. Nearly 2 months later of pretty solid grind and learning how to do it all and it's basically done apart from some minor tidy up work and hopefully getting it looked over by an electrical engineer I know.

Then the scary part of sending away for pcbs to be made and trying to resurrect it using the parts off the original board (hopefully they work)

If it works out I may attempt the WonderSwan Color later - I have one still working candidate but definitely on the hunt for a very corroded donor to scan if anyone has one they can part with.

The schematic mostly makes sense and has uncovered a lot of useful info, but many of the components are hard to identify exactly, as the markings (if any) aren't readily searchable it seems so expanding on that is an ongoing project.

Currently the github for it isn't public but will be in future when its known to be working. For anyone trying to repair one though and needing trace diagrams or schematics let me know and I might be able to rush getting completed either the interactive BOM or the WIP repair authoring I've done for it for the app Classic Repair Toolkit.