Emu48 detection

[Eric Rechlin]

A couple ideas:

1. On the 49/50 you can check the serial number. If it's bogus (something like "COYWWXXXXX") it's probably running in an emulator. You can use #10001Dh LIBEVAL to get the serial information.

2. You could check how long a test command takes to run (with TEVAL on the 49/50 or by manually calculating the time elapsed on a 48). If it's fast, it must be on an emulator. If it's slow, it's either on a real calculator or an emulator running at "real speed".