thanks - I did try the screen off, I'm not sure if it's just a rubbish cable as I only have one to test at the moment, but for some reason both MGB and Pushpin have the weird noise on more than one DMG (LSDJ doesn't though.) It's kinda minor in the grand scheme of gameboy noise, but noticeable when it's amplified and the problem is it's kinda rhythmic, but not in a good way!
the plan is to build it in the SFC (if it will fit), and have the leds and button and MIDI ports on the SFC shell and the link cable appearing out of the shell so it can be plugged into the SGB2 I have.
I realise it doesn't achieve MUCH advantage technically/may not be less noisy, but I just like the idea.
I've not actually checked whether a SGB2 actually sends power to the Arduinboy yet, which might be another issue.
Last edited by Duck (Mar 7, 2018 6:26 pm)