TME emulator status: now works with SunOS ethernet

I found and fixed a variety of minor problems with the emulator, and also  
fixed some biggies:

pkg/34899: TME sun3 emulator fails M68K instruction  cmpmw (sp)+,(sp)+
pkg/35305: TME sun3 emulator incorrectly emulates ethernet  obie & i825x6 
hardware

The fix for 35305 allows SunOS to use ethernet  inside the emulator.  So 
other than extended precision floating point, and  a bizarre memory problem 
compiling the chimera web-browser from pkgsrc inside  NetBSD 3.0 inside the emulator 
(35803), TME works absolutely functionally  identically to a real sun3.

I even had a Sun3 Dillo poker party, where  guests were able to pull-up the 
poker hand rankings on the internet via the  dillo web-browser - built from 
pkgsrc - running on an emulated Sun3 running  NetBSD 3.0.  The nameserver is 
finicky running on a Sun3, but everything  worked perfectly and wild coed 
partygoers screamed with Sun3 emulation  enjoyment.

With the dillo success, I don't think there's anything more to  test or fix, 
so I'll take a happy Christmas vacation from emulating.   I haven't heard 
anything from Matt, but hope he's smiling!
 
/arthur