dltaylor@cns.SanDiego.NCR.COM (Dan Taylor) (04/30/91)
In <15380@life.ai.mit.edu> psteffn@pogo.gnu.ai.mit.edu (Paul Steffen) writes: >Wouldn't it be possible to do some exception handling so that you could >emulate the extra '20/'30 opcodes on a '00? It's possible, but REALLY slow. You HAVE to disable interrupts while you do it, too. This prevents register contents from changing while you emulate supposedly "indivisible" opcodes. Not, all in all, a thing you'd want to do, if you can get the '020, in the first place.