The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  X  1  1  X  X  X  X  X  X  X  X  X  X  X  X  1  1  1  1 X^2  0 X^2  1  0  1  1  1  1  1  1  1  1  1  1  1  X  X X^2  0 X^2  0 X^2  2 X^2  2 X^2  2 X^2  2  1
 0 X^2+2  0 X^2+2  0 X^2+2  0 X^2+2  2 X^2  2 X^2  2 X^2  2 X^2  0 X^2+2  0 X^2+2  0 X^2+2  0 X^2+2  2 X^2  2 X^2  2 X^2 X^2+2 X^2+2  2 X^2 X^2+2 X^2+2  0  2 X^2 X^2  0  2 X^2  0  2 X^2  0 X^2+2  2 X^2 X^2+2 X^2 X^2+2  0 X^2  2  0  2  0  2 X^2+2 X^2 X^2+2 X^2 X^2+2 X^2  0  2 X^2+2 X^2 X^2+2 X^2 X^2 X^2 X^2 X^2 X^2 X^2 X^2 X^2  0
 0  0  2  0  0  2  2  2  2  2  2  2  0  0  0  0  0  0  0  0  2  2  2  2  2  2  2  2  0  0  0  2  0  0  0  2  0  0  2  0  2  2  2  2  2  0  0  0  0  0  0  2  2  0  0  0  2  2  2  2  0  0  2  2  2  2  0  0  0  0  2  2  2  2  0  0  2  2  0  0  0
 0  0  0  2  2  2  2  0  0  0  2  2  2  2  0  0  0  0  2  2  2  2  0  0  0  0  2  2  2  2  2  2  0  0  0  0  2  2  0  2  0  0  2  2  2  0  0  0  0  0  2  2  0  2  0  2  2  2  0  0  2  2  2  2  0  0  0  0  0  2  2  0  0  2  2  0  2  0  0  2  0

generates a code of length 81 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 80.

Homogenous weight enumerator: w(x)=1x^0+14x^80+222x^81+14x^82+1x^96+2x^97+2x^98

The gray image is a code over GF(2) with n=648, k=8 and d=320.
This code was found by Heurico 1.16 in 0.547 seconds.