The generator matrix

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

generates a code of length 82 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 78.

Homogenous weight enumerator: w(x)=1x^0+162x^78+674x^79+748x^80+548x^81+490x^82+402x^83+296x^84+208x^85+196x^86+140x^87+81x^88+64x^89+37x^90+44x^91+1x^92+2x^94+1x^96+1x^102

The gray image is a code over GF(2) with n=656, k=12 and d=312.
This code was found by Heurico 1.16 in 0.406 seconds.