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* RAMPX, RAMPY, RAMPZ, RAMPD and EIND: 8-bit segment registers that are prepended to 16-bit addresses in order to form 24-bit addresses; only available in parts with large address spaces.
===Status
The status register bits are:
#<li value=0> C [[Carry flag]]. This is a borrow flag on subtracts. The <code>INC</code> and <code>DEC</code> instructions do ''not'' modify the carry flag, so they may be used to loop over multi-byte arithmetic operations.<ref name="isa_manual">{{cite web |url=http://ww1.microchip.com/downloads/en/devicedoc/atmel-0856-avr-instruction-set-manual.pdf |title=AVR Instruction Set Manual |date=November 2016 |publisher=Atmel |id=Atmel-0856L}}</ref></li>
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