RG DS - Second Screen as Keypad?
Wondering if anyone has gotten the second screen on the RG DS to function as a keypad for systems like Intellivision, Colecovision, Atari 5200, etc.
There was an NDS emulator like this back in the day for Intellivision (Nintellivision) that mimicked the overlays too.
https://forums.atariage.com/topic/325075-nintellisivion-reimaginging-intellivision-lives-ds/
This and the second screen for PC10 seem like best use cases outside of NDS that might make it worth messing around with.