Checking SIMH's virtual MicroVAX 3900 it implements CPU and memory (CVAX CPU/16MB-64MB), console, real time clock, CR11/CD11 card reader, LPV11 line printer, DZV11 multiplexor, DHQ11 multiplexor, cartridge, floppy, disk, magnetic tape and DELQA/DEQNA ethernet controller. The real Mini behind of this virtual MicroVAX 3900 could look like the previous picture.