You have 4 of 4 known ETL Mark 4a games

E Calculation (1996)(Seiichi Okoma)(File 1 of 2)[E.m4a]
E Calculation (1996)(Seiichi Okoma)(File 2 of 2)[E.out]
Square Root By Newton's Method (1996)(Seiichi Okoma)(File 1 of 2)[Newton.m4a]
Square Root By Newton's Method (1996)(Seiichi Okoma)(File 2 of 2)[Newton.out]