Simple ROM example.  Two inductors with mutual inductance connected in series.

* ports are p0 m0 p1 m1...
.include equiv_circuitROM_pin_con7_r20.spice

* and instance of the state space mode
Xstate p0 m0 p1 m1 p2 m2 p3 m3 p4 m4 p5 m5 p6 m6 ROMequiv_pin_con7_r20

* connect m0 to ground
vgnd0 m0 0
vgnd1 m1 0
vgnd2 m2 0
vgnd3 m3 0
vgnd4 m4 0
vgnd5 m5 0
vgnd6 m6 0

isrc0 0 p0  ac 1
isrc1 0 p1  ac 0
isrc2 0 p2  ac 0
isrc3 0 p3  ac 0
isrc4 0 p4  ac 0
isrc5 0 p5  ac 0
isrc6 0 p6  ac 0

*.tran 1ns 2us UIC 
.ac dec 5 1 1e12
.options method=gear
.print ac v(p0) v(p1) v(p2) v(p3) v(p4) v(p5) v(p6)