The i-wram cache setting can be changed in the GBARunner2 settings menu, so a different build isn't needed.What's the difference between arm7 and arm9 modes? Also where can I download the latest iwramcache.nds file? I checked github and couldn't find it, that's the way to play games with the iwramcache enabled, right? I'm using DSL.
Also, the difference between the ARM7 and ARM9 builds is which CPU the DLDI code runs on.