128KB DS firmware is not accepted

[TCAtrevor]

For some reason, only original DS (256KiB) and iQue DS (512KiB) firmware files are accepted in melonDS. I only have the DS-mode firmware from my 3DS (128KiB), which works perfectly fine in the regular melonDS, so I do not understand why this restriction was put in place. You cannot boot to the DS system menu, but that could just be disabled when using this type of firmware.

In the meantime, you can just manually place the firmware.bin file into Delta's folder structure, and it has no problem.