The RISC PC [1] was based on ARM but had a ‘guest processor’ slot which could be filled with an x86 chip amongst others. You could run Windows in a window on it

The RISC PC [1] was based on ARM but had a ‘guest processor’ slot which could be filled with an x86 chip amongst others. You could run Windows in a window on its own CPU. [1] https://en.wikipedia.org/wiki/RiscPC https://en.wikipedia.org/wiki/RiscPC