A portable electronic device 14 wherein said {HEAD ~ locus} of {TAIL ~ said frame buffer} comprises a row of pixels of memory within said frame buffer 
A portable electronic device 14 wherein said { HEAD ~ locus } of { TAIL ~ said frame buffer } comprises a row of pixels of memory within said frame buffer
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH