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  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  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  X  0  3 2X X+6  X 2X+6 2X  3 X+6 2X+6  0 X+6  6  6  X 2X+6  0 2X  X X+6  6  3 X+3 2X+3 X+3 2X+3 2X+6 2X+3  3  6 X+3 2X X+3 2X+3 2X+3 2X  0  0 2X 2X+6  3  6  6 X+6 2X+3 X+3 X+6 X+3  3 X+6 X+3 2X+6 2X+6 2X+3 2X  0  3  6  6 2X  3 2X+3  0 2X  3 2X+3  0 2X+6  6 2X+6  X  X  X  X X+3 X+6  X X+6
 0  0  X 2X+6  3 2X+6  X X+6 2X+3  3 X+6 2X  3 2X 2X+3  0  6  6 X+3 X+3 X+3 X+3 X+6 X+6 2X+3  6  6 2X X+3 X+6 2X 2X+6 2X+6  0  3 2X+3  X  X 2X 2X+3 2X+6 2X+6  0  3 X+3  3  0 X+6 2X+3 2X  X  0  X  3  X X+3 X+6  6  6  6  X 2X X+3 2X+6 2X+6  6 2X+3  3 X+6 2X+3 2X  0 2X+6 2X+3 X+6  3 X+3  6 2X  X

generates a code of length 80 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 159.

Homogenous weight enumerator: w(x)=1x^0+160x^159+1944x^160+80x^162+2x^240

The gray image is a code over GF(3) with n=720, k=7 and d=477.
This code was found by Heurico 1.16 in 0.226 seconds.