▁overlay , ▁t ape - drive , ▁micro phone ▁input , ▁two ▁expansion ▁ports ▁Play C able ▁( av ail ability ▁through ▁cable ▁TV ▁provider ▁ 1 9 8 1 – 1 9 8 3 ) M att el ▁and ▁General ▁Inst rument ▁joint ▁vent ure , ▁manufact ured ▁by ▁G I / J er ro ld 8 K ▁x ▁ 1 0 bit ▁RAM ▁Int ell ivo ice ▁Vo ice ▁Syn thesis ▁Module ▁General ▁Inst rument ▁SP 0 2 5 6 - 0 1 2 ▁Computer ▁Module ▁( includes ▁the ▁following ) Comput er ▁Ad apter ▁ 2 K ▁x ▁ 8 - bit ▁S RAM , ▁ 1 2 K ▁E CS ▁Exec / B AS IC ▁R OM , ▁memory ▁expansion ▁port ▁( dis cont in ued ) ▁A Y - 3 - 8 9 1 7 ▁sound ▁generator ▁two ▁DE - 9 ▁hand ▁controller ▁connect ors ▁audio ▁t ape ▁rec order ▁data ▁storage ▁interface , ▁two ▁ 3 . 5 mm ▁mon o ▁j acks ▁and ▁one ▁ 2 . 5 mm ▁jack ▁for ▁optional ▁t ape ▁control ▁auxili ary ▁jack ▁for ▁a ▁serial ▁printer ▁connection ▁( M att el ▁Aqu arius ▁compatible ), ▁ 3 . 5 mm ▁s tere o ▁jack ▁that ▁is ▁R S - 2 3 2 C ▁compatible , ▁where ▁tip ▁is ▁data ▁transmit , ▁ring ▁is ▁D SR / D CD , ▁sle e ve ▁is ▁ground , ▁ 1 2 0 0 ▁ba ud , ▁ 8 ▁data ▁bits , ▁ 2