::
All done.
Removed 2764s from another machine and read them. Low-profile socketed that board and replaced the originals. Burned some extra 64s and the 27C128 that was needed, which works without socket modification.
Also socketed one end of each of the ribbon cables to make future dismantling and testing easier, plus of course the UHF lead from the modulator.
Then like an idiot found the ROMs in the EMU – same checksums of course…