@karlos
the XC68EC06RC60 has a MMU & FPU
its **not** software for the MC68060RC66E..ive got two..
im useing one to type this works fine with quake..
the other i have to move around the socket ( ie ) i cant push it all the way in the socket,if i do the machine will not even boot..
put the chip half way in & it boots fine..but quake shows fault the same applys to the XC68EC060RC60..( CORRECTION ) diffrent fault for both processors..
iv not got them plug-in at the moment..
the MC68060RC66 processor came back with something like ( reach the end of something..& quake crashed.