I just wanted to save to a patch on my TI Desktop, and noticed T and up was completely blank. Since I'd like to keep the factory presets in there as well I was going for bank T. However in the manual it states that I can only save in the RAM, not in ROM (which makes sense, seeing ROM stands for Read Only Memory). What is the use for the ROM banks then? Are these patches I can never overwrite? And if so, what is the use of the blank banks on T and up?