For networking, if necessary, one can use slirp.
"Another alternative to direct pcap and tun/tap networking on all environments is NAT (SLiRP) networking. NAT networking is limited to only IP network protocols so DECnet, LAT and Clusting can't work on a NAT connected interface, but this may be the easiest solution for many folks."
source: https://github.com/simh/simh/blob/master/0readme_ethernet.tx...