[Simh] KS10 IMP documentation

[Phil Budne]

ISTR someone (Mark Crispin?) telling me the AN22 interface for the
KS10 was NCP era.

My notes at http://www.ultimate.com/phil/dec/tops-20 say:
v3 of TOPS-20 had ARPAnet (1/78)
v4 had new leader support (4/80)
5.2 had the BBN TCP/IP JSYS interface (12/82?)
5.3 had the DEC TCP: device (back ported from 6.x?) 6/83
5.4 had TCP/IP over NI (ethernet) 9/84?

The ARPAnet didn't go to TCP until 1/1/83, so the KS10 was long dead
to the TOPS-20 monitor group.