This is getting nutty!
I put the 1701 board back in, to run RAYXTMFM.
First run, 1701 error, RAYXTMFM it told me the ROM wasn't in its database, and quit. (attached log file RAY1.TXT)
So I put in one of the other ROMs I had prepared, 1701 error, and got the same RAYXTMFM results, except that...