Game Boy Digital Sampling Oscilloscope (GBDSO) (Elektor magazine 2000 by S.G. Willis) (menu only)
A rare Game Boy cartridge (unlicensed) from Elektor magazine October 2000; the cartridge itself has to be built using their special kit.
This video only shows the rev. H2.2/rev S3.6 firmware menu and not the GBDSO actually functioning.
If you want to see this in action working how it should (but not in emulator quality), see richfiles's video:
• Gameboy 2-Channel Oscilloscope Cartridge
More information re: actually getting it to work today:
https://www.elektormagazine.com/labs/...