MC68000 microcode, from https://og.kervella.org/m68k/

Originally from http://www.qmtpro.com/~nes/chipimages/index.php

Discussed in http://www.atari-forum.com/viewtopic.php?f=101&t=29610 and http://gendev.spritesmind.net/forum/viewtopic.php?t=1091