;->REGx: new data
	eor R22,REGx	; 1
	mov R20,R22		; 1
	swap R22		; 1
	eor R22,R20		; 1
	mov R21,R22		; 1
	lsr R22			; 1
	lsr R22			; 1
	eor R22,R21		; 1
	mov R21,R22		; 1
	lsr R22			; 1
	eor R22,R21		; 1
	andi R22,7		; 1
	mov R21,R20		; 1
	lsr R22			; 1 | do not merge with code
	ror R21			; 1 | touching the carryflag
	ror R22			; 1 | (READBIT/WRITEBIT!)
	mov R20,R23		; 1
	mov R23,R21		; 1
	eor R20,R22		; 1
	lsr R21			; 1 | do not merge with code
	ror R22			; 1 | touching the carryflag 
	eor R23,R21		; 1
	eor R22,R20		; 1
					;--
					;23