tree 7cce7fbf7c7486d4a198f81cd81ac64f3b4954e7
parent 53daa4f6d3e689054e5e72159563a8f200ddbfa2
author Tim Edwards <tim@opencircuitdesign.com> 1670901550 -0500
committer Tim Edwards <tim@opencircuitdesign.com> 1670901550 -0500

Modified the magic tech file for gf180mcu to use the GDS layer
23:5 as an isolated substrate marker (isosub).  This layer is not
documented (that I could find), but that is clearly what it is
being used for.