CODE S=
DE POP, HL POP, chkPS,
LDA(DE),
(HL) CPr,
IFZ, ( same size? )
B A LDrr, ( loop A times )
BEGIN,
HL INCd, DE INCd,
JRNZ, BREAK, ( not equal? break early. NZ is set. )
DJNZ, AGAIN,
THEN,
PUSHZ,
;CODE