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  8  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  4  2  2
 0  2  0  6  8  6  8  2  0 14  8 10  8  6  8  2  8  6 10  0  0  2  0  6  8 14  8  2  6  8  8  2  4  6 12  2  4 14  4 10 12 10 14 12 12  6  2 12 12  6 12 14  2 10 12  4 12  4  4 12 14 10  6  2  8  0  4  8 12  6  2 14 10  8  4 14  6  6 14 12  0 12  8 12
 0  0 12  0  0  4 12  4  8  8  4 12  8 12  4  8  4  4  0  8  0  4  4  8  8 12  0 12  0 12 12  8  4  0 12  0  0 12  0  4 12  4 12  8  8  0  0 12 12  8  4  8  8  8  4  0  0  8  4  8  4 12  4 12  0  8 12  0  4  8 12  0  4  8  4  0  8 12 12  8 12  0  8  0
 0  0  0 12  4 12  4  0  8  4 12  8 12  4  8  8  0  4  8  4  8  8  4 12  0 12 12  0  4 12  8  0  0  0 12  4  4  8  8  4  4 12  0  4  0  8 12  0  8  8  8  0 12  4  4 12  0 12 12  8  0 12  8  4  0  0  0  0  0  0  8  0  8  4  4 12  4 12  4 12 12  0  8  8

generates a code of length 84 over Z16 who´s minimum homogenous weight is 80.

Homogenous weight enumerator: w(x)=1x^0+190x^80+512x^82+536x^84+512x^85+48x^86+160x^88+80x^90+8x^92+1x^160

The gray image is a code over GF(2) with n=672, k=11 and d=320.
This code was found by Heurico 1.16 in 16.8 seconds.