\tikzset{
	memory/.style={
		matrix of nodes, name=M,
		every node/.append style={
			font=\footnotesize\tt, outer xsep=.4ex,
		anchor=base},
		column 2/.append style={
			every node/.append style=
			{draw,fill=white, 
				minimum width=#1, 
			minimum height=1.3em}
		}, 
		row sep=-.4pt,
	},
	memory/.default=4em,
	descr/.style={draw=none,fill=none},
	break above/.style={shape=tape, tape bend top=in and out, tape bend bottom=none},
	break below/.style={shape=tape, tape bend top=none, tape bend bottom=in and out},
	!!/.style={fill=green!20}, % chktex 26
	pointer/.style = {font=\tt, anchor=base, inner sep=2pt},
}
