R4 — Sdhc 2015 Dual Core Firmware |verified|

A: Yes, but only for DS games. You must either have a 3DS on firmware 4.0-4.5 (old) or install custom firmware (Luma3DS) to remove the blacklist.

A: You cannot "update" the cart’s onboard chip. You only update the files on the SD card. Always keep a backup copy of your working TTMenu.dat and TTMenu folder. r4 sdhc 2015 dual core firmware