The A600 is NOT a 32-bit computer.
A600 is a 32-bit computer.
A600 can ONLY run 32-bit software.
A600 has 16 general purpose 32-bit registers.
A600 only understands 32-bit RAM.
A600 can move 32-bits of data from point A to point B in a single instruction because it is a 32-bit computer.
A600 has a 4GB ram barrier just like all 32-bit computers, because it is a 32-bit computer.
A600 runs many thousands of 32-bit softwares because it is a 32-bit computer.
A600 cannot run 64-bit software because it is a 32-bit computer.
A600 cannot run 24-bit software because it is a 32-bit computer.
A600 cannot run 16-bit software because it is a 32-bit computer.
A600 cannot run 8-bit software because it is a 32-bit computer.
A600 cannot run 4-bit software because it is a 32-bit computer.
The reason A600 software works on A1200 and A4000 and on the 68060 and 68040 without a recompile is they are all 32-bit computers to start with so the software just automatically works.
The A600 is permanently perpetually stuck in 32-bit mode forever and ever and ever. There is no way to switch into 64 bit mode. It can't be downgraded into 24-bit mode. It can't be downgraded into 16-bit mode. It is just STUCK at 32-bit mode period. The End.