23 Sep
2001
23 Sep
'01
7:34 a.m.
Tony Duell wrote:
<snip>
Agreed. Emulation is one way to implement an instuction set.
Emulating a PDP-11 on a PERQ in microcode is microcode, and emulation.
Emulating a PDP-11 on a PERQ in the PERQ machine code is only emulation.
Emulators are
simply mimics of other machines, however they are implemented.
Ah, so if the instruction set has been implemented before somewhere, then
it's an emulator, is that your definition? So a PERQ running microcode to
execute PDP11 instructions is a PDP11 emulator?
While true, I think I could also justify describing that microcode as
implementing the PDP11 instruction set on the PERQ.
-tony