Code Size Mnemonic Description 010010001s000nnn B,W EXT Dn Dn <- sign_ext( part_of_Dn) // ---------------------------------------------------------------------- @ 35.3.5.7. INTEGER CONVERSIONS ON Z80 None Such insturctions, need software code Example: ; A -> HL or A ld h,0 jr p,?1 dec h ?1: ld l,a // ----------------------------------------------------------------------