Hi everyone, I'm trying to find out a way to add a new target MCU (say, T123) such that I can compile C and/or Assembly into instruction set of this T123. Then, just like "-mmcu=attiny24", I can use "-mmcu=T123" to get the Hex/Bin for T123. Or shortly, how to support a new target device? Of course, I have all information needed about this T123. But I have no idea what/how to do? Could somebody please be so kind to help/teach me??