Hi - I have noticed that some AVR assembler instructions only work with registers r0-r15, while some work only with registers r16-r31 (such as LDI). Can anyone tell me what is different between these two sets of registers? Are r0-r15 used for some special function or something? Thanks, and sorry for such a simple question - I'm very new to the world of AVRs!
edit: by the way - if it matters - currently I'm only using AT90S8515 AVRs.