diff --git a/src/xinit.c b/src/xinit.c
index 75849e9b..ca4f75ce 100644
--- a/src/xinit.c
+++ b/src/xinit.c
@@ -1961,6 +1961,9 @@ int Tcl_AppInit(Tcl_Interp *inter)
    my_snprintf(tmp, S(tmp), 
       "append XSCHEM_LIBRARY_PATH : [file dirname \"%s\"]/xschem_library/generators", pwd_dir);
    tcleval(tmp);
+   my_snprintf(tmp, S(tmp), 
+      "append XSCHEM_LIBRARY_PATH : [file dirname \"%s\"]/xschem_library/inst_sch_select", pwd_dir);
+   tcleval(tmp);
    my_snprintf(tmp, S(tmp), 
       "append XSCHEM_LIBRARY_PATH : [file dirname \"%s\"]/xschem_library/binto7seg", pwd_dir);
    tcleval(tmp);
@@ -1976,7 +1979,7 @@ int Tcl_AppInit(Tcl_Interp *inter)
  }
 #else
  char *up_hier=NULL, *win_xschem_library_path=NULL;
- #define WIN_XSCHEM_LIBRARY_PATH_NUM 10
+ #define WIN_XSCHEM_LIBRARY_PATH_NUM 11
  const char *WIN_XSCHEM_LIBRARY_PATH[WIN_XSCHEM_LIBRARY_PATH_NUM] = {
    /*1*/  "xschem_library",
    /*2*/  "xschem_library/devices", 
@@ -1985,9 +1988,10 @@ int Tcl_AppInit(Tcl_Interp *inter)
    /*5*/  "xschem_library/logic", 
    /*6*/  "xschem_library/xschem_simulator",
    /*7*/  "xschem_library/generators", 
-   /*8*/  "xschem_library/binto7seg", 
-   /*9*/  "xschem_library/pcb", 
-   /*10*/ "xschem_library/rom8k" };
+   /*8*/  "xschem_library/inst_sch_select", 
+   /*9*/  "xschem_library/binto7seg", 
+   /*10*/ "xschem_library/pcb", 
+   /*11*/ "xschem_library/rom8k" };
  GetModuleFileNameA(NULL, install_dir, MAX_PATH);
  change_to_unix_fn(install_dir);
  size_t dir_len=strlen(install_dir);
diff --git a/src/xschemrc b/src/xschemrc
index 7af5afb5..616cffa0 100644
--- a/src/xschemrc
+++ b/src/xschemrc
@@ -22,6 +22,7 @@
 #### /home/schippes/share/doc/xschem/logic
 #### /home/schippes/share/doc/xschem/xschem_simulator
 #### /home/schippes/share/doc/xschem/generators
+#### /home/schippes/share/doc/xschem/inst_sch_select
 #### /home/schippes/share/doc/xschem/binto7seg
 #### /home/schippes/share/doc/xschem/pcb
 #### /home/schippes/share/doc/xschem/rom8k
@@ -35,6 +36,7 @@
 #### ../xschem_library/logic
 #### ../xschem_library/xschem_simulator
 #### ../xschem_library/generators
+#### ../xschem_library/inst_sch_select
 #### ../xschem_library/binto7seg
 #### ../xschem_library/pcb
 #### ../xschem_library/rom8k
@@ -51,6 +53,7 @@
 # append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/logic
 # append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/pcb
 # append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/generators
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/inst_sch_select
 # append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/binto7seg
 # append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/symgen
 # append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/xTAG
@@ -68,6 +71,7 @@
 # append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/logic"
 # append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/pcb"
 # append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/generators"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/inst_sch_select"
 # append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/binto7seg"
 
 ###########################################################################
diff --git a/xschem_library/Makefile b/xschem_library/Makefile
index c62d42b2..b9debfdc 100644
--- a/xschem_library/Makefile
+++ b/xschem_library/Makefile
@@ -9,6 +9,7 @@ install: FORCE
 	$(SCCBOX) mkdir -p "$(XDOCDIR)"/logic "$(XDOCDIR)"/xTAG "$(XDOCDIR)"/binto7seg 
 	$(SCCBOX) mkdir -p "$(XDOCDIR)"/symgen "$(XDOCDIR)"/ngspice "$(XDOCDIR)"/rulz-r8c33
 	$(SCCBOX) mkdir -p "$(XDOCDIR)"/generators
+	$(SCCBOX) mkdir -p "$(XDOCDIR)"/inst_sch_select
 	$(SCCBOX) mkdir -p "$(XDOCDIR)"/rom8k "$(XDOCDIR)"/gschem_import/sym
 	$(SCCBOX) install -f -d devices/*.sym "$(system_library_dir)"
 	$(SCCBOX) install -f -d devices/*.sch "$(system_library_dir)"
@@ -18,6 +19,7 @@ install: FORCE
 	$(SCCBOX) install -f -d binto7seg/*.sym "$(XDOCDIR)"/binto7seg
 	$(SCCBOX) install -f -d binto7seg/*.sch "$(XDOCDIR)"/binto7seg
 	$(SCCBOX) install -f -d generators/*.* "$(XDOCDIR)"/generators
+	$(SCCBOX) install -f -d inst_sch_select/*.* "$(XDOCDIR)"/inst_sch_select
 	$(SCCBOX) install -f -d xTAG/*.sym* "$(XDOCDIR)"/xTAG
 	$(SCCBOX) install -f -d xTAG/*.sch "$(XDOCDIR)"/xTAG
 	$(SCCBOX) install -f -d logic/*.sym "$(XDOCDIR)"/logic
@@ -44,7 +46,7 @@ uninstall: FORCE
 	$(SCCBOX) rm -f "$(system_library_dir)"/* "$(XDOCDIR)"/examples/* "$(XDOCDIR)"/pcb/* \
                         "$(XDOCDIR)"/ngspice/* "$(XDOCDIR)"/symgen/* "$(XDOCDIR)"/logic/* "$(XDOCDIR)"/xTAG/* \
                         "$(XDOCDIR)"/rom8k/* "$(XDOCDIR)"/xschem_simulator/* "$(XDOCDIR)"/binto7seg/* \
-                        "$(XDOCDIR)"/rulz-r8c33/* "$(XDOCDIR)"/generators/* \
+                        "$(XDOCDIR)"/rulz-r8c33/* "$(XDOCDIR)"/generators/* "$(XDOCDIR)"/inst_sch_select/* \
                         "$(XDOCDIR)"/gschem_import/*.sym \
                         "$(XDOCDIR)"/gschem_import/*.sch \
                         "$(XDOCDIR)"/gschem_import/sym/*.sym \
diff --git a/xschem_library/examples/0_examples_top.sch b/xschem_library/examples/0_examples_top.sch
index 674bd73d..1b538064 100644
--- a/xschem_library/examples/0_examples_top.sch
+++ b/xschem_library/examples/0_examples_top.sch
@@ -81,14 +81,14 @@ that's me...)
 T {Simulation
 Graphs
 } 1530 -550 0 0 0.6 0.6 {layer=4}
-T {Bus rippers} 580 -440 0 0 0.6 0.6 {layer=4}
+T {Bus rippers} 580 -400 0 0 0.6 0.6 {layer=4}
 N 820 -420 940 -420 {lab=#net1}
 N 860 -460 860 -370 {lab=#net2}
 N 860 -390 920 -390 {lab=#net2}
 N 880 -430 910 -420 {lab=#net1}
-N 380 -370 640 -370 {lab=BUS[4:0]}
-N 510 -460 510 -380 {lab=BUS[1]}
-N 410 -420 410 -380 {lab=BUS[2]}
+N 380 -330 640 -330 {lab=BUS[4:0]}
+N 510 -420 510 -340 {lab=BUS[1]}
+N 410 -380 410 -340 {lab=BUS[2]}
 C {poweramp.sym} 480 -690 0 0 {name=x1
 tclcommand="xschem descend"}
 C {tesla.sym} 160 -570 0 0 {name=x2}
@@ -116,10 +116,10 @@ program=x-www-browser
 
 }
 C {rlc.sym} 160 -770 0 0 {name=x0}
-C {lab_pin.sym} 640 -370 0 1 {name=l2 sig_type=std_logic lab=BUS[4:0]}
-C {bus_connect.sym} 500 -370 0 0 {name=l3 lab=BUS[1]}
-C {bus_connect_nolab.sym} 400 -370 0 0 {name=r1}
-C {lab_pin.sym} 410 -420 3 1 {name=l4 sig_type=std_logic lab=BUS[2]}
+C {lab_pin.sym} 640 -330 0 1 {name=l2 sig_type=std_logic lab=BUS[4:0]}
+C {bus_connect.sym} 500 -330 0 0 {name=l3 lab=BUS[1]}
+C {bus_connect_nolab.sym} 400 -330 0 0 {name=r1}
+C {lab_pin.sym} 410 -380 3 1 {name=l4 sig_type=std_logic lab=BUS[2]}
 C {LCC_instances.sym} 160 -450 0 0 {name=x7}
 C {test_backannotated_subckt.sym} 160 -410 0 0 {name=x10}
 C {plot_manipulation.sym} 160 -370 0 0 {name=x11}
@@ -1469,3 +1469,4 @@ tclcommand="xschem descend"}
 C {poweramp_lcc.sym} 480 -650 0 0 {name=x16
 tclcommand="xschem descend"}
 C {test_symbolgen.sym} 480 -530 0 0 {name=x18}
+C {inst_sch_select.sym} 480 -490 0 0 {name=x24}
diff --git a/xschem_library/inst_sch_select/comp_65nm.sch b/xschem_library/inst_sch_select/comp_65nm.sch
new file mode 100644
index 00000000..428d609e
--- /dev/null
+++ b/xschem_library/inst_sch_select/comp_65nm.sch
@@ -0,0 +1,110 @@
+v {xschem version=3.1.0 file_version=1.2
+}
+G {}
+K {}
+V {}
+S {}
+E {}
+N 590 -150 590 -130 { lab=0}
+N 370 -180 550 -180 { lab=GN1}
+N 330 -230 330 -210 { lab=GN1}
+N 330 -310 330 -290 { lab=VCC}
+N 330 -150 330 -130 { lab=0}
+N 510 -240 670 -240 { lab=#net1}
+N 590 -240 590 -210 { lab=#net1}
+N 510 -340 510 -300 { lab=#net2}
+N 670 -340 670 -300 { lab=#net3}
+N 550 -410 550 -380 { lab=#net2}
+N 510 -380 550 -380 { lab=#net2}
+N 510 -380 510 -340 { lab=#net2}
+N 510 -460 510 -440 { lab=#net4}
+N 800 -460 800 -400 { lab=VCC}
+N 670 -370 760 -370 { lab=#net3}
+N 330 -210 370 -210 { lab=GN1}
+N 370 -210 370 -180 { lab=GN1}
+N 670 -460 670 -440 { lab=VCC}
+N 550 -410 640 -410 { lab=#net2}
+N 800 -150 800 -130 { lab=0}
+N 800 -340 800 -210 { lab=#net5}
+N 550 -180 550 -170 { lab=GN1}
+N 550 -170 660 -170 { lab=GN1}
+N 660 -180 660 -170 { lab=GN1}
+N 660 -180 760 -180 { lab=GN1}
+N 670 -380 670 -340 { lab=#net3}
+N 1130 -290 1170 -290 { lab=OUT}
+N 800 -290 870 -290 { lab=#net5}
+N 980 -150 980 -130 { lab=0}
+N 980 -420 980 -400 { lab=VCC}
+N 940 -370 940 -180 { lab=#net5}
+N 980 -340 980 -210 { lab=#net6}
+N 870 -290 940 -290 { lab=#net5}
+N 1130 -150 1130 -130 { lab=0}
+N 1130 -420 1130 -400 { lab=VCC}
+N 1090 -370 1090 -180 { lab=#net6}
+N 1130 -340 1130 -210 { lab=OUT}
+N 980 -290 1090 -290 { lab=#net6}
+N 990 -620 990 -510 { lab=#net6}
+N 930 -620 930 -510 { lab=#net5}
+N 890 -560 930 -560 { lab=#net5}
+N 890 -560 890 -290 { lab=#net5}
+N 990 -560 1010 -560 { lab=#net6}
+N 1010 -560 1030 -560 { lab=#net6}
+N 1030 -560 1030 -290 { lab=#net6}
+N 960 -660 990 -660 { lab=#net6}
+N 990 -660 990 -620 { lab=#net6}
+N 930 -510 930 -470 { lab=#net5}
+N 930 -470 960 -470 { lab=#net5}
+C {nmos4.sym} 570 -180 0 0 {name=M1 model=nmos w=4u l=0.4u m=1}
+C {lab_pin.sym} 590 -180 0 1 {name=p2 lab=0}
+C {lab_pin.sym} 590 -130 0 0 {name=p6 lab=0}
+C {nmos4.sym} 350 -180 0 1 {name=M2 model=nmos w=4u l=0.4u m=1}
+C {lab_pin.sym} 330 -180 0 0 {name=p7 lab=0}
+C {isource.sym} 330 -260 0 0 {name=I0 value=30u}
+C {lab_pin.sym} 330 -310 0 0 {name=p9 lab=VCC}
+C {lab_pin.sym} 330 -130 0 0 {name=p16 lab=0}
+C {nmos4.sym} 490 -270 0 0 {name=M3 model=nmos w=1.5u l=0.2u m=1}
+C {lab_pin.sym} 510 -270 0 1 {name=p17 lab=0}
+C {nmos4.sym} 690 -270 0 1 {name=M4 model=nmos w=1.5u l=0.2u m=1}
+C {lab_pin.sym} 670 -270 0 0 {name=p18 lab=0 l=0.2u}
+C {pmos4.sym} 530 -410 0 1 {name=M5 model=pmos w=6u l=0.3u m=1}
+C {pmos4.sym} 650 -410 0 0 {name=M6 model=pmos w=6u l=0.3u m=1}
+C {lab_pin.sym} 670 -460 0 0 {name=p21 lab=VCC}
+C {lab_pin.sym} 510 -410 0 0 {name=p23 lab=VCC}
+C {lab_pin.sym} 670 -410 0 1 {name=p33 lab=VCC}
+C {lab_wire.sym} 500 -180 0 0 {name=l2 lab=GN1}
+C {ipin.sym} 100 -310 0 0 {name=p161 lab=PLUS}
+C {ipin.sym} 100 -260 0 0 {name=p1 lab=MINUS}
+C {opin.sym} 180 -290 0 0 {name=p20 lab=OUT}
+C {title.sym} 160 -30 0 0 {name=l1 author="Stefan Schippers"}
+C {lab_pin.sym} 710 -270 0 1 {name=p3 lab=PLUS}
+C {lab_pin.sym} 470 -270 0 0 {name=p4 lab=MINUS}
+C {lab_pin.sym} 1170 -290 0 1 {name=p14 lab=OUT}
+C {pmos4.sym} 780 -370 0 0 {name=M14 model=pmos w=6u l=0.3u m=1}
+C {lab_pin.sym} 800 -370 0 1 {name=p15 lab=VCC}
+C {lab_pin.sym} 800 -460 0 0 {name=p22 lab=VCC}
+C {spice_probe.sym} 420 -180 0 0 {name=p27 attrs=""}
+C {spice_probe.sym} 570 -410 0 0 {name=p28 attrs=""}
+C {nmos4.sym} 780 -180 0 0 {name=M7 model=nmos w=4u l=0.4u m=1}
+C {lab_pin.sym} 800 -180 0 1 {name=p5 lab=0}
+C {lab_pin.sym} 800 -130 0 1 {name=p8 lab=0}
+C {nmos4.sym} 960 -180 0 0 {name=M8 model=nmos w=1u l=0.4u m=1}
+C {lab_pin.sym} 980 -180 0 1 {name=p10 lab=0}
+C {lab_pin.sym} 980 -130 0 1 {name=p11 lab=0}
+C {pmos4.sym} 960 -370 0 0 {name=M9 model=pmos w=2u l=0.4u m=1}
+C {lab_pin.sym} 980 -370 0 1 {name=p12 lab=VCC}
+C {lab_pin.sym} 980 -420 0 0 {name=p13 lab=VCC}
+C {nmos4.sym} 1110 -180 0 0 {name=M10 model=nmos w=1u l=0.4u m=1}
+C {lab_pin.sym} 1130 -180 0 1 {name=p24 lab=0}
+C {lab_pin.sym} 1130 -130 0 1 {name=p25 lab=0}
+C {pmos4.sym} 1110 -370 0 0 {name=M11 model=pmos w=2u l=0.4u m=1}
+C {lab_pin.sym} 1130 -370 0 1 {name=p26 lab=VCC}
+C {lab_pin.sym} 1130 -420 0 0 {name=p29 lab=VCC}
+C {nmos4.sym} 960 -490 3 0 {name=M13 model=nmos w=2u l=0.1u m=1}
+C {lab_pin.sym} 960 -510 3 1 {name=p31 lab=0}
+C {spice_probe.sym} 1040 -290 0 0 {name=p35 attrs=""}
+C {spice_probe.sym} 840 -290 0 0 {name=p36 attrs=""}
+C {nmos4.sym} 960 -640 1 0 {name=M12 model=nmos w=2u l=0.1u m=1}
+C {lab_pin.sym} 960 -620 1 1 {name=p30 lab=0}
+C {spice_probe.sym} 560 -240 0 0 {name=p32 attrs=""}
+C {parax_cap.sym} 390 -170 0 0 {name=C2 gnd=0 value=200f m=1}
+C {vdd.sym} 510 -460 0 0 {name=l3 lab=VCC}
diff --git a/xschem_library/inst_sch_select/comp_65nm.sym b/xschem_library/inst_sch_select/comp_65nm.sym
new file mode 100644
index 00000000..4ffaaf36
--- /dev/null
+++ b/xschem_library/inst_sch_select/comp_65nm.sym
@@ -0,0 +1,24 @@
+v {xschem version=3.1.0 file_version=1.2
+}
+G {}
+K {type=subcircuit
+format="@name @pinlist @symname"
+template="name=x1"
+}
+V {}
+S {}
+E {}
+L 4 -40 -50 -40 50 {}
+L 4 40 0 60 0 {}
+L 4 -60 30 -40 30 {}
+L 4 -40 -50 40 0 {}
+L 4 -40 50 40 0 {}
+L 4 -60 -30 -40 -30 {}
+B 5 -62.5 -32.5 -57.5 -27.5 {name=PLUS dir=in }
+B 5 57.5 -2.5 62.5 2.5 {name=OUT dir=out }
+B 5 -62.5 27.5 -57.5 32.5 {name=MINUS dir=in }
+T {@symname} -32 44 0 0 0.3 0.3 {}
+T {@name} -10 -48.25 0 0 0.2 0.2 {}
+T {PLUS} -38.75 -30.25 0 0 0.2 0.2 {}
+T {OUT} 28.75 -5.25 0 1 0.2 0.2 {}
+T {MINUS} -38.75 18.5 0 0 0.2 0.2 {}
diff --git a/xschem_library/inst_sch_select/comp_65nm_empty.sch b/xschem_library/inst_sch_select/comp_65nm_empty.sch
new file mode 100644
index 00000000..f26c2f64
--- /dev/null
+++ b/xschem_library/inst_sch_select/comp_65nm_empty.sch
@@ -0,0 +1,8 @@
+v {xschem version=3.1.0 file_version=1.2
+}
+G {}
+K {}
+V {}
+S {vout out 0 2}
+E {}
+C {architecture.sym} 70 -610 0 0 { nothing here, use global schematic properties }
diff --git a/xschem_library/inst_sch_select/comp_65nm_file.cir b/xschem_library/inst_sch_select/comp_65nm_file.cir
new file mode 100644
index 00000000..a8c05397
--- /dev/null
+++ b/xschem_library/inst_sch_select/comp_65nm_file.cir
@@ -0,0 +1,6 @@
+* comp_65nm_file.cir
+
+.subckt comp_65nm_file PLUS OUT MINUS
+v1 x 0 1
+e1 out x plus minus 0.5
+.ends
diff --git a/xschem_library/inst_sch_select/comp_65nm_parax.sch b/xschem_library/inst_sch_select/comp_65nm_parax.sch
new file mode 100644
index 00000000..a2c0c181
--- /dev/null
+++ b/xschem_library/inst_sch_select/comp_65nm_parax.sch
@@ -0,0 +1,21 @@
+v {xschem version=3.1.0 file_version=1.2
+}
+G {}
+K {}
+V {}
+S {}
+E {}
+N 100 -310 120 -310 {
+lab=PLUS}
+N 100 -260 120 -260 {
+lab=MINUS}
+N 230 -290 230 -260 {
+lab=OUT}
+C {opin.sym} 230 -290 0 0 {name=p20 lab=OUT}
+C {ipin.sym} 100 -260 0 0 {name=p1 lab=MINUS}
+C {ipin.sym} 100 -310 0 0 {name=p161 lab=PLUS}
+C {title.sym} 160 -30 0 0 {name=l1 author="Stefan Schippers"}
+C {parax_cap.sym} 120 -300 0 0 {name=C1 gnd=0 value=50f m=1}
+C {parax_cap.sym} 120 -250 0 0 {name=C2 gnd=0 value=50f m=1}
+C {ammeter.sym} 230 -230 0 0 {name=Vmeas}
+C {lab_pin.sym} 230 -200 0 0 {name=p2 sig_type=std_logic lab=0}
diff --git a/xschem_library/inst_sch_select/inst_sch_select.sch b/xschem_library/inst_sch_select/inst_sch_select.sch
new file mode 100644
index 00000000..1360fb3c
--- /dev/null
+++ b/xschem_library/inst_sch_select/inst_sch_select.sch
@@ -0,0 +1,277 @@
+v {xschem version=3.1.0 file_version=1.2
+}
+G {}
+K {}
+V {}
+S {}
+E {}
+B 2 710 -590 1510 -190 {flags=graph
+y1=-0.013
+y2=2.1
+ypos1=0
+ypos2=2
+divy=5
+subdivy=1
+unity=1
+x1=0
+x2=5e-08
+divx=5
+subdivx=1
+node="out1
+out2
+out3
+out4
+out5"
+color="7 8 9 10 11"
+dataset=-1
+unitx=1
+logx=0
+logy=0
+hilight_wave=-1}
+B 2 710 -910 1510 -590 {flags=graph
+y1=-0.013
+y2=2.1
+ypos1=0
+ypos2=2
+divy=5
+subdivy=1
+unity=1
+x1=0
+x2=5e-08
+divx=5
+subdivx=1
+node="plus
+minus"
+color="4 14"
+dataset=-1
+unitx=1
+logx=0
+logy=0
+hilight_wave=-1}
+T {Default instance:
+Uses comp_65nm.sch} 10 -900 0 0 0.4 0.4 { layer=7}
+T {Alternate instance:
+Uses comp_65nm_parax.sch} 10 -690 0 0 0.4 0.4 { layer=8}
+T {Alternate instance:
+Uses comp_65nm_pex
+contained in attribute
+spice_sym_def
+No schematic used} 10 -490 0 0 0.4 0.4 {}
+T {Alternate instance:
+Uses comp_65nm_empty.sch
+netlist embedded in global
+spice schematic attribute} 340 -890 0 0 0.4 0.4 { layer=10}
+T {Alternate instance:
+Uses spice_sym_def to read in 
+file comp_65nm_file.cir
+no schematic used} 340 -590 0 0 0.4 0.4 { layer=11}
+T {The same symbol is simulated with 5 different implementations
+using instance 'schematic' and 'spice_sym_def' attributes} 190 -1010 0 0 0.6 0.6 { layer=4 slant=oblique}
+T {Instance based implementation selection.} 250 -1070 0 0 0.8 0.8 {}
+C {comp_65nm.sym} 180 -790 0 0 {name=x1}
+C {lab_pin.sym} 120 -820 0 0 {name=p1 lab=PLUS}
+C {lab_pin.sym} 240 -790 0 1 {name=p2 lab=OUT1}
+C {lab_pin.sym} 120 -760 0 0 {name=p3 lab=MINUS}
+C {comp_65nm.sym} 180 -580 0 0 {name=x2
+schematic=comp_65nm_parax.sch}
+C {lab_pin.sym} 120 -610 0 0 {name=p4 lab=PLUS}
+C {lab_pin.sym} 240 -580 0 1 {name=p5 lab=OUT2}
+C {lab_pin.sym} 120 -550 0 0 {name=p6 lab=MINUS}
+C {comp_65nm.sym} 180 -310 0 0 {name=x3
+schematic=comp_65nm_pex
+spice_sym_def=".subckt comp_65nm_pex PLUS OUT MINUS
+** parasitic netlist
+cparax1 net1 0 20f
+cparax2 net2 0 20f
+cparax3 net3 0 20f
+cparax4 net4 0 20f
+cparax5 net5 0 20f
+cparaxout out 0 40f
+M1 net1 GN1 0 0 nmos w=4u l=0.4u m=1
+M2 GN1 GN1 0 0 nmos w=4u l=0.4u m=1
+I0 VCC GN1 30u
+M3 net2 MINUS net1 0 nmos w=1.5u l=0.2u m=1
+M4 net3 PLUS net1 0 nmos w=1.5u l=0.2u m=1
+M5 net2 net2 VCC VCC pmos w=6u l=0.3u m=1
+M6 net3 net2 VCC VCC pmos w=6u l=0.3u m=1
+M14 net4 net3 VCC VCC pmos w=6u l=0.3u m=1
+.save v(gn1)
+.save v(net2)
+M7 net4 GN1 0 0 nmos w=4u l=0.4u m=1
+M8 net5 net4 0 0 nmos w=1u l=0.4u m=1
+M9 net5 net4 VCC VCC pmos w=2u l=0.4u m=1
+M10 OUT net5 0 0 nmos w=1u l=0.4u m=1
+M11 OUT net5 VCC VCC pmos w=2u l=0.4u m=1
+M13 net4 net4 net5 0 nmos w=2u l=0.1u m=1
+M12 net5 net5 net4 0 nmos w=2u l=0.1u m=1
+C2 GN1 0 200f m=1
+.ends"
+
+verilog_sym_def="verilog stuff"
+vhdl_sym_def="vhdl stuff"}
+C {lab_pin.sym} 120 -340 0 0 {name=p7 lab=PLUS}
+C {lab_pin.sym} 240 -310 0 1 {name=p8 lab=OUT3}
+C {lab_pin.sym} 120 -280 0 0 {name=p9 lab=MINUS}
+C {code.sym} 0 -200 0 0 {name=MODELS only_toplevel=false value="* Beta Version released on 2/22/06
+
+* PTM 65nm NMOS 
+ 
+.model nmos nmos level = 54
++version = 4.0 binunit = 1 paramchk= 1 mobmod = 0 
++capmod = 2 igcmod = 1 igbmod = 1 geomod = 1 
++diomod = 1 rdsmod = 0 rbodymod= 1 rgatemod= 1 
++permod = 1 acnqsmod= 0 trnqsmod= 0 
++tnom = 27 toxe = 1.85e-9 toxp = 1.2e-9 toxm = 1.85e-9 
++dtox = 0.65e-9 epsrox = 3.9 wint = 5e-009 lint = 5.25e-009 
++ll = 0 wl = 0 lln = 1 wln = 1 
++lw = 0 ww = 0 lwn = 1 wwn = 1 
++lwl = 0 wwl = 0 xpart = 0 toxref = 1.85e-9 
++xl = -30e-9
++vth0 = 0.423 k1 = 0.4 k2 = 0.01 k3 = 0 
++k3b = 0 w0 = 2.5e-006 dvt0 = 1 dvt1 = 2 
++dvt2 = -0.032 dvt0w = 0 dvt1w = 0 dvt2w = 0 
++dsub = 0.1 minv = 0.05 voffl = 0 dvtp0 = 1.0e-009 
++dvtp1 = 0.1 lpe0 = 0 lpeb = 0 xj = 1.96e-008 
++ngate = 2e+020 ndep = 2.54e+018 nsd = 2e+020 phin = 0 
++cdsc = 0.000 cdscb = 0 cdscd = 0 cit = 0 
++voff = -0.13 nfactor = 1.9 eta0 = 0.0058 etab = 0 
++vfb = -0.55 u0 = 0.0491 ua = 6e-010 ub = 1.2e-018 
++uc = 0 vsat = 124340 a0 = 1.0 ags = 1e-020 
++a1 = 0 a2 = 1.0 b0 = 0 b1 = 0 
++keta = 0.04 dwg = 0 dwb = 0 pclm = 0.04 
++pdiblc1 = 0.001 pdiblc2 = 0.001 pdiblcb = -0.005 drout = 0.5 
++pvag = 1e-020 delta = 0.01 pscbe1 = 8.14e+008 pscbe2 = 1e-007 
++fprout = 0.2 pdits = 0.08 pditsd = 0.23 pditsl = 2.3e+006 
++rsh = 5 rdsw = 165 rsw = 85 rdw = 85 
++rdswmin = 0 rdwmin = 0 rswmin = 0 prwg = 0 
++prwb = 6.8e-011 wr = 1 alpha0 = 0.074 alpha1 = 0.005 
++beta0 = 30 agidl = 0.0002 bgidl = 2.1e+009 cgidl = 0.0002 
++egidl = 0.8 
++aigbacc = 0.012 bigbacc = 0.0028 cigbacc = 0.002 
++nigbacc = 1 aigbinv = 0.014 bigbinv = 0.004 cigbinv = 0.004 
++eigbinv = 1.1 nigbinv = 3 aigc = 0.012 bigc = 0.0028 
++cigc = 0.002 aigsd = 0.012 bigsd = 0.0028 cigsd = 0.002 
++nigc = 1 poxedge = 1 pigcd = 1 ntox = 1 
++xrcrg1 = 12 xrcrg2 = 5 
++cgso = 1.5e-010 cgdo = 1.5e-010 cgbo = 2.56e-011 cgdl = 2.653e-10 
++cgsl = 2.653e-10 ckappas = 0.03 ckappad = 0.03 acde = 1 
++moin = 15 noff = 0.9 voffcv = 0.02 
++kt1 = -0.11 kt1l = 0 kt2 = 0.022 ute = -1.5 
++ua1 = 4.31e-009 ub1 = 7.61e-018 uc1 = -5.6e-011 prt = 0 
++at = 33000 
++fnoimod = 1 tnoimod = 0 
++jss = 0.0001 jsws = 1e-011 jswgs = 1e-010 njs = 1 
++ijthsfwd= 0.01 ijthsrev= 0.001 bvs = 10 xjbvs = 1 
++jsd = 0.0001 jswd = 1e-011 jswgd = 1e-010 njd = 1 
++ijthdfwd= 0.01 ijthdrev= 0.001 bvd = 10 xjbvd = 1 
++pbs = 1 cjs = 0.0005 mjs = 0.5 pbsws = 1 
++cjsws = 5e-010 mjsws = 0.33 pbswgs = 1 cjswgs = 3e-010 
++mjswgs = 0.33 pbd = 1 cjd = 0.0005 mjd = 0.5 
++pbswd = 1 cjswd = 5e-010 mjswd = 0.33 pbswgd = 1 
++cjswgd = 5e-010 mjswgd = 0.33 tpb = 0.005 tcj = 0.001 
++tpbsw = 0.005 tcjsw = 0.001 tpbswg = 0.005 tcjswg = 0.001 
++xtis = 3 xtid = 3 
++dmcg = 0e-006 dmci = 0e-006 dmdg = 0e-006 dmcgt = 0e-007 
++dwj = 0.0e-008 xgw = 0e-007 xgl = 0e-008 
++rshg = 0.4 gbmin = 1e-010 rbpb = 5 rbpd = 15 
++rbps = 15 rbdb = 15 rbsb = 15 ngcon = 1 
+
+* PTM 65nm PMOS
+ 
+.model pmos pmos level = 54
++version = 4.0 binunit = 1 paramchk= 1 mobmod = 0 
++capmod = 2 igcmod = 1 igbmod = 1 geomod = 1 
++diomod = 1 rdsmod = 0 rbodymod= 1 rgatemod= 1 
++permod = 1 acnqsmod= 0 trnqsmod= 0 
++tnom = 27 toxe = 1.95e-009 toxp = 1.2e-009 toxm = 1.95e-009 
++dtox = 0.75e-9 epsrox = 3.9 wint = 5e-009 lint = 5.25e-009 
++ll = 0 wl = 0 lln = 1 wln = 1 
++lw = 0 ww = 0 lwn = 1 wwn = 1 
++lwl = 0 wwl = 0 xpart = 0 toxref = 1.95e-009 
++xl = -30e-9
++vth0 = -0.365 k1 = 0.4 k2 = -0.01 k3 = 0 
++k3b = 0 w0 = 2.5e-006 dvt0 = 1 dvt1 = 2 
++dvt2 = -0.032 dvt0w = 0 dvt1w = 0 dvt2w = 0 
++dsub = 0.1 minv = 0.05 voffl = 0 dvtp0 = 1e-009 
++dvtp1 = 0.05 lpe0 = 0 lpeb = 0 xj = 1.96e-008 
++ngate = 2e+020 ndep = 1.87e+018 nsd = 2e+020 phin = 0 
++cdsc = 0.000 cdscb = 0 cdscd = 0 cit = 0 
++voff = -0.126 nfactor = 1.9 eta0 = 0.0058 etab = 0 
++vfb = 0.55 u0 = 0.00574 ua = 2.0e-009 ub = 0.5e-018 
++uc = 0 vsat = 70000 a0 = 1.0 ags = 1e-020 
++a1 = 0 a2 = 1 b0 = -1e-020 b1 = 0 
++keta = -0.047 dwg = 0 dwb = 0 pclm = 0.12 
++pdiblc1 = 0.001 pdiblc2 = 0.001 pdiblcb = 3.4e-008 drout = 0.56 
++pvag = 1e-020 delta = 0.01 pscbe1 = 8.14e+008 pscbe2 = 9.58e-007 
++fprout = 0.2 pdits = 0.08 pditsd = 0.23 pditsl = 2.3e+006 
++rsh = 5 rdsw = 165 rsw = 85 rdw = 85 
++rdswmin = 0 rdwmin = 0 rswmin = 0 prwg = 3.22e-008 
++prwb = 6.8e-011 wr = 1 alpha0 = 0.074 alpha1 = 0.005 
++beta0 = 30 agidl = 0.0002 bgidl = 2.1e+009 cgidl = 0.0002 
++egidl = 0.8 
++aigbacc = 0.012 bigbacc = 0.0028 cigbacc = 0.002 
++nigbacc = 1 aigbinv = 0.014 bigbinv = 0.004 cigbinv = 0.004 
++eigbinv = 1.1 nigbinv = 3 aigc = 0.69 bigc = 0.0012 
++cigc = 0.0008 aigsd = 0.0087 bigsd = 0.0012 cigsd = 0.0008 
++nigc = 1 poxedge = 1 pigcd = 1 ntox = 1 
++xrcrg1 = 12 xrcrg2 = 5 
++cgso = 1.5e-010 cgdo = 1.5e-010 cgbo = 2.56e-011 cgdl = 2.653e-10
++cgsl = 2.653e-10 ckappas = 0.03 ckappad = 0.03 acde = 1
++moin = 15 noff = 0.9 voffcv = 0.02
++kt1 = -0.11 kt1l = 0 kt2 = 0.022 ute = -1.5 
++ua1 = 4.31e-009 ub1 = 7.61e-018 uc1 = -5.6e-011 prt = 0 
++at = 33000 
++fnoimod = 1 tnoimod = 0 
++jss = 0.0001 jsws = 1e-011 jswgs = 1e-010 njs = 1 
++ijthsfwd= 0.01 ijthsrev= 0.001 bvs = 10 xjbvs = 1 
++jsd = 0.0001 jswd = 1e-011 jswgd = 1e-010 njd = 1 
++ijthdfwd= 0.01 ijthdrev= 0.001 bvd = 10 xjbvd = 1 
++pbs = 1 cjs = 0.0005 mjs = 0.5 pbsws = 1 
++cjsws = 5e-010 mjsws = 0.33 pbswgs = 1 cjswgs = 3e-010 
++mjswgs = 0.33 pbd = 1 cjd = 0.0005 mjd = 0.5 
++pbswd = 1 cjswd = 5e-010 mjswd = 0.33 pbswgd = 1 
++cjswgd = 5e-010 mjswgd = 0.33 tpb = 0.005 tcj = 0.001 
++tpbsw = 0.005 tcjsw = 0.001 tpbswg = 0.005 tcjswg = 0.001 
++xtis = 3 xtid = 3 
++dmcg = 0e-006 dmci = 0e-006 dmdg = 0e-006 dmcgt = 0e-007 
++dwj = 0.0e-008 xgw = 0e-007 xgl = 0e-008 
++rshg = 0.4 gbmin = 1e-010 rbpb = 5 rbpd = 15 
++rbps = 15 rbdb = 15 rbsb = 15 ngcon = 1 
+"}
+C {vsource.sym} 680 -110 0 0 {name=V1 value=2}
+C {lab_pin.sym} 680 -140 0 0 {name=p21 lab=VCC}
+C {lab_pin.sym} 680 -80 0 0 {name=p10 lab=0}
+C {vsource.sym} 800 -110 0 0 {name=V2 value=1}
+C {lab_pin.sym} 800 -140 0 0 {name=p11 lab=MINUS}
+C {lab_pin.sym} 800 -80 0 0 {name=p12 lab=0}
+C {vsource.sym} 950 -110 0 0 {name=V3 value="pwl 0 0 10n 0 20n 2 30n 2 40n 0"}
+C {lab_pin.sym} 950 -140 0 0 {name=p13 lab=PLUS}
+C {lab_pin.sym} 950 -80 0 0 {name=p14 lab=0}
+C {title.sym} 160 -30 0 0 {name=l1 author="Stefan Schippers"}
+C {launcher.sym} 790 -170 0 0 {name=h5
+descr="load waves" 
+tclcommand="xschem raw_read $netlist_dir/test_instance_schematic_selection.raw tran"
+}
+C {code_shown.sym} 140 -190 0 0 {name=COMMANDS only_toplevel=false value=".control
+  save all
+  tran 1n 50n
+  write test_instance_schematic_selection.raw
+.endc"}
+C {comp_65nm.sym} 490 -700 0 0 {name=x4
+schematic=comp_65nm_empty.sch}
+C {lab_pin.sym} 430 -730 0 0 {name=p15 lab=PLUS}
+C {lab_pin.sym} 550 -700 0 1 {name=p16 lab=OUT4}
+C {lab_pin.sym} 430 -670 0 0 {name=p17 lab=MINUS}
+C {comp_65nm.sym} 490 -420 0 0 {name=x5
+schematic=comp_65nm_file
+spice_sym_def="tcleval(
+  [read_data_nonewline [abs_sym_path comp_65nm_file.cir]]
+)"
+
+vhdl_sym_def="tcleval(
+  [read_data_nonewline [abs_sym_path comp_65nm_file.cir]]
+)"
+tclcommand="textwindow [abs_sym_path comp_65nm_file.cir]"}
+C {lab_pin.sym} 430 -450 0 0 {name=p18 lab=PLUS}
+C {lab_pin.sym} 550 -420 0 1 {name=p19 lab=OUT5}
+C {lab_pin.sym} 430 -390 0 0 {name=p20 lab=MINUS}
diff --git a/xschem_library/inst_sch_select/inst_sch_select.sym b/xschem_library/inst_sch_select/inst_sch_select.sym
new file mode 100644
index 00000000..678f63ad
--- /dev/null
+++ b/xschem_library/inst_sch_select/inst_sch_select.sym
@@ -0,0 +1,11 @@
+v {xschem version=3.1.0 file_version=1.2}
+K {type=subcircuit
+format="@name @pinlist @symname"
+template="name=x1"
+}
+T {@symname} -85.5 -6 0 0 0.3 0.3 {}
+T {@name} 135 -22 0 0 0.2 0.2 {}
+L 4 -130 -10 130 -10 {}
+L 4 -130 10 130 10 {}
+L 4 -130 -10 -130 10 {}
+L 4 130 -10 130 10 {}
diff --git a/xschem_library/inst_sch_select/xschemrc b/xschem_library/inst_sch_select/xschemrc
new file mode 100644
index 00000000..8dcdbf27
--- /dev/null
+++ b/xschem_library/inst_sch_select/xschemrc
@@ -0,0 +1,433 @@
+#### xschemrc system configuration file
+
+#### values may be overridden by user's ~/.xschem/xschemrc configuration file
+#### or by project-local ./xschemrc
+
+###########################################################################
+#### XSCHEM INSTALLATION DIRECTORY: XSCHEM_SHAREDIR
+###########################################################################
+#### Normally there is no reason to set this variable if using standard
+#### installation. Location of files is set at compile time but may be overridden
+#### with following line:
+# set XSCHEM_SHAREDIR $env(HOME)/share/xschem
+
+#### older xschem versions
+# set XSCHEM_SHAREDIR  $env(HOME)/x/xschem-r2363/src
+# set XSCHEM_SHAREDIR  $env(HOME)/xschem
+
+
+
+# libptr:
+# set to noop    do nothing
+# set to empty   for empty XSCHEM_LIBRARY_PATH
+# set to sky130  for sky130 schematics
+# set to repo    to edit directly in xschem-repo workspace
+# set to share   for installed schematics (share/doc/xschem)
+# set to xschem  for ~/xschem/xschem_library
+set XSCHEM_LIBRARY_PATH {}
+append XSCHEM_LIBRARY_PATH :${XSCHEM_SHAREDIR}/xschem_library/devices
+
+append XSCHEM_LIBRARY_PATH :~/.xschem/xschem_library/library_LCC_stefan
+append XSCHEM_LIBRARY_PATH :~/.xschem/xschem_library
+append XSCHEM_LIBRARY_PATH :$env(HOME)/xschem-repo/trunk/xschem_library/logic
+append XSCHEM_LIBRARY_PATH :$env(HOME)/xschem-repo/trunk/xschem_library/examples
+append XSCHEM_LIBRARY_PATH :$env(HOME)/xschem-repo/trunk/xschem_library/binto7seg
+append XSCHEM_LIBRARY_PATH :$env(HOME)/xschem-repo/trunk/xschem_library/ngspice
+append XSCHEM_LIBRARY_PATH :$env(HOME)/xschem-repo/trunk/xschem_library/xschem_simulator
+append XSCHEM_LIBRARY_PATH :$env(HOME)/xschem-repo/trunk/xschem_library/rom8k
+append XSCHEM_LIBRARY_PATH :$env(HOME)/xschem-repo/trunk/xschem_library/pcb
+
+append XSCHEM_LIBRARY_PATH :[pwd]
+
+
+###########################################################################
+#### XSCHEM SYSTEM-WIDE DESIGN LIBRARY PATHS: XSCHEM_LIBRARY_PATH
+###########################################################################
+#### If unset xschem starts with XSCHEM_LIBRARY_PATH set to the default, typically:
+# /home/schippes/.xschem/xschem_library
+# /home/schippes/share/xschem/xschem_library/devices
+# /home/schippes/share/doc/xschem/examples
+# /home/schippes/share/doc/xschem/ngspice
+# /home/schippes/share/doc/xschem/logic
+# /home/schippes/share/doc/xschem/xschem_simulator
+# /home/schippes/share/doc/xschem/binto7seg
+# /home/schippes/share/doc/xschem/pcb
+# /home/schippes/share/doc/xschem/rom8k
+
+#### For testing in build src directory
+#### if unset following paths are set and maintained if existing:
+#
+# ~/.xschem/xschem_library
+# ../xschem_library/devices
+# ../xschem_library/examples
+# ../xschem_library/ngspice
+# ../xschem_library/logic
+# ../xschem_library/xschem_simulator
+# ../xschem_library/binto7seg
+# ../xschem_library/pcb
+# ../xschem_library/rom8k
+
+#### For testing after installation: uncomment following lines
+# set xschem_doc_dir [file dirname ${XSCHEM_SHAREDIR}]/doc/xschem
+# set XSCHEM_LIBRARY_PATH {}
+# append XSCHEM_LIBRARY_PATH :~/.xschem/xschem_library
+# append XSCHEM_LIBRARY_PATH :${XSCHEM_SHAREDIR}/xschem_library/devices
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/examples
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/ngspice
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/xschem_simulator
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/rom8k
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/logic
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/pcb
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/binto7seg
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/symgen
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/xTAG
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/rulz-r8c33
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/gschem_import
+# append XSCHEM_LIBRARY_PATH :${xschem_doc_dir}/gschem_import/sym
+
+#### For Windows, use ; instead of :, and enclosed pathname with ""
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/devices"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/examples"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/ngspice"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/xschem_simulator"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/rom8k"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/logic"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/pcb"
+# append XSCHEM_LIBRARY_PATH ";${XSCHEM_SHAREDIR}/../xschem_library/binto7seg"
+
+###########################################################################
+#### SET CUSTOM COLORS FOR XSCHEM LIBRARIES MATCHING CERTAIN PATTERNS
+###########################################################################
+#### each line contains a dircolor(pattern) followed by a color
+#### color can be an ordinary name (grey, brown, blue) or a hex code {#77aaff}
+#### hex code must be enclosed in braces
+#### these are the defaults:
+# set dircolor(/share/xschem/) red
+# set dircolor(/share/doc/xschem/) {#338844}
+
+###########################################################################
+#### WINDOW TO OPEN ON STARTUP: XSCHEM_START_WINDOW
+###########################################################################
+#### Start without a design if no filename given on command line:
+#### To avoid absolute paths, use a path that is relative to one of the
+#### XSCHEM_LIBRARY_PATH directories. Default: empty
+# set XSCHEM_START_WINDOW {0_examples_top.sch}
+
+###########################################################################
+#### DIRECTORY WHERE SIMULATIONS, NETLIST AND SIMULATOR OUTPUTS ARE PLACED
+###########################################################################
+#### If unset $USER_CONF_DIR/simulations is assumed (normally ~/.xschem/simulations) 
+# set netlist_dir $env(HOME)/.xschem/simulations
+
+###########################################################################
+#### NETLIST AND HIERARCHICAL PRINT EXCLUDE PATTERNS
+###########################################################################
+#### xschem_libs is a list of patterns of cells to exclude from netlisting.
+#### Matching is done as regular expression on full cell path
+#### Example:
+#### set xschem_libs { {/cmoslib/} {/analoglib/.*pass} buffer }
+#### in this case all schematic cells of directory cmoslib and cells containing
+#### /analoglib/...pass and buffer will be excluded from netlisting
+#### default value: empty
+# set xschem_libs {}
+#### noprint_libs is a list with same rules as for xschem_libs. This
+#### variable controls hierarchical print
+#### default value: empty
+# set noprint_libs {}
+#### nolist_libs is a list with same rules as for xschem_libs. This
+#### variable controls cell listing in procedure list_hierarchy.
+#### default value: empty
+# set nolist_libs {}
+
+###########################################################################
+#### CHANGE DEFAULT [] WITH SOME OTHER CHARACTERS FOR BUSSED SIGNALS 
+#### IN SPICE NETLISTS (EXAMPLE: DATA[7] --> DATA<7>) 
+###########################################################################
+#### default: empty (use xschem default, [ ])
+# set bus_replacement_char {<>}
+#### for XSPICE: replace square brackets as the are used for XSPICE vector nodes.
+# set bus_replacement_char {__} 
+
+###########################################################################
+#### SOME DEFAULT BEHAVIOR
+###########################################################################
+#### Allowed values:  spice, verilog, vhdl, tedax, default: spice
+# set netlist_type spice
+
+#### Some netlisting options (these are the defaults)
+# set verilog_2001 1
+
+#### to use a fixed line with set change_lw to 0 and set some value to line_width
+#### these are the defaults
+# set line_width 0
+# set change_lw 1
+
+#### allow color postscript and svg exports. Default: 1, enable color
+# set color_ps 1
+
+#### initial size of xschem window you can specify also position with (wxh+x+y)
+#### this is the default:
+set initial_geometry {750x500}
+
+#### if set to 0, when zooming out allow the viewport do drift toward the mouse position,
+#### allowing to move away by zooming / unzooming with mouse wheel
+#### default setting: 0
+# set unzoom_nodrift 0
+
+#### if set to 1 full zoom will center the drawing instead of anhoring to lower
+#### left corner. Default: 0
+set zoom_full_center 1
+
+#### if set to 1 allow to place multiple components with same name.
+#### Warning: this is normally not allowed in any simulation netlist.
+#### default: 0, do not allow place multiple elements with same name (refdes)
+# set disable_unique_names 0
+
+#### if set to 1 continue drawing lines / wires after click
+#### default: 0
+# set persistent_command 1
+
+#### if set to 1 a wire is inserted when separating components that are
+#### connected by pins. Default: not enabled (0)
+# set connect_by_kissing 1
+
+#### if set to 1 automatically join/trim wires while editing
+#### this may slow down on rally big designs. Can be disabled via menu 
+#### default: 0
+# set autotrim_wires 0
+
+#### set widget scaling (mainly for font display), this is useful on 4K displays
+#### default: unset (tk uses its default) > 1.0 ==> bigger 
+set tk_scaling 1.1
+
+#### use the tclreadline package if available , Default: 1 (enabled).
+# set use_tclreadline 1
+
+#### disable some symbol layers. Default: none, all layers are visible.
+# set enable_layer(5) 0 ;# example to disable pin red boxes
+
+#### enable to scale grid point size as done with lines at close zoom, default: 0
+set big_grid_points 1
+
+#### enable grouping contiguous bits of bus slices in net->pin instance
+#### assignments for verilog netlists. Default: disabled (0)
+# set verilog_bitblast 0
+
+#### allow searching the full search path for schematics associated to symbols
+#### instead of looking only in symbol directory. Default: disabled (0).
+# set search_schematic 0
+
+#### focus the schematic window if mouse goes over it, even if a dialog box
+#### is displayed, without needing to click.
+#### This allows to move/zoom/pan the schematic while editing attributes.
+#### Clicking in the schematic window usually closes the dialog box or starts
+#### editing a new component if clicking on a new component.
+#### default: enabled (1)
+set autofocus_mainwindow 1
+
+#### set component browser always above drawing canvas.
+#### default: enabled (1)
+# set component_browser_on_top 0
+
+#
+###########################################################################
+#### EXPORT FORMAT TRANSLATORS, PNG AND PDF
+###########################################################################
+#### command to translate xpm to png; (assumes command takes source 
+#### and dest file as arguments, example: gm convert plot.xpm plot.png)
+#### default: {gm convert}
+#### Windows ghostscript uses gswin64c
+# set to_png {gswin64c -sDEVICE=png16m -o}
+# set to_png {gm convert}
+
+#### command to translate ps to pdf; (assumes command takes source
+#### and dest file as arguments, example: ps2pdf plot.ps plot.pdf)
+#### default: ps2pdf
+#### Windows ghostscript uses gswin64c
+# set to_pdf {gswin64c -sDEVICE=pdfwrite -o}
+# set to_pdf ps2pdf
+set to_pdf {ps2pdf -dAutoRotatePages=/None}
+
+
+###########################################################################
+#### UNDO: SAVE ON DISK OR KEEP IN MEMORY
+###########################################################################
+#### Alloved: 'disk'or 'memory'. 
+#### Saving undo on disk is safer but slower on extremely big schematics.
+#### In most cases you won't notice any delay. Undo on disk allows previous
+#### state recovery in case of crashes. In-memory undo is extremely fast
+#### but should a crash occur everything is lost.
+#### It is highly recommended to keep undo on disk.
+#### Default: disk
+# set undo_type disk
+
+###########################################################################
+#### CUSTOM GRID / SNAP VALUE SETTINGS
+###########################################################################
+#### Warning: changing these values will likely break compatibility
+#### with existing symbol libraries. Defaults: grid 20, snap 10.
+# set cadgrid 20
+# set cadsnap 10
+
+###########################################################################
+#### CUSTOM COLORS  MAY BE DEFINED HERE
+###########################################################################
+#  set cadlayers 22
+#  set light_colors {
+#   "#ffffff" "#0044ee" "#aaaaaa" "#222222" "#229900"
+#   "#bb2200" "#00ccee" "#ff0000" "#888800" "#00aaaa"
+#   "#880088" "#00ff00" "#0000cc" "#666600" "#557755"
+#   "#aa2222" "#7ccc40" "#00ffcc" "#ce0097" "#d2d46b"
+#   "#ef6158" "#fdb200" }
+
+#  set dark_colors {
+#   "#000000" "#00ccee" "#3f3f3f" "#cccccc" "#88dd00"
+#   "#bb2200" "#00ccee" "#ff0000" "#ffff00" "#ffffff"
+#   "#ff00ff" "#00ff00" "#0000cc" "#aaaa00" "#aaccaa"
+#   "#ff7777" "#bfff81" "#00ffcc" "#ce0097" "#d2d46b"
+#   "#ef6158" "#fdb200" }
+
+###########################################################################
+#### CAIRO STUFF
+###########################################################################
+#### Scale all fonts by this number
+# set cairo_font_scale 1.0
+
+#### default for following two is 0.85 (xscale) and 0.88 (yscale) to 
+#### match cairo font spacing
+# set nocairo_font_xscale 1.0
+#### set nocairo_font_yscale 1.0
+
+#### Scale line spacing by this number
+# set cairo_font_line_spacing 1.0
+
+#### Specify a font
+# set cairo_font_name {Sans-Serif}
+# set svg_font_name {Sans-Serif}
+
+#### Lift up text by some zoom-corrected pixels for
+#### better compatibility wrt no cairo version.
+#### Useful values in the range [-1, 3]
+# set cairo_vert_correct 0
+# set nocairo_vert_correct 0
+
+###########################################################################
+#### KEYBINDINGS
+###########################################################################
+#### General format for specifying a replacement for a keybind
+#### Replace Ctrl-q with Escape (so you wont kill the program)
+# set replace_key(Control-q) Escape
+
+#### swap w and W keybinds; Always specify Shift for capital letters
+# set replace_key(Shift-W) Key-w
+# set replace_key(Key-w) Shift-W
+
+###########################################################################
+#### TERMINAL
+###########################################################################
+#### default for linux: xterm
+# set terminal {xterm -geometry 100x35 -fn 9x15 -bg black -fg white -cr white -ms white }
+#### lxterminal is not OK since it will not inherit env vars: 
+#### In order to reduce memory usage and increase the performance, all instances
+#### of the lxterminal are sharing a single process. LXTerminal is part of LXDE
+
+###########################################################################
+#### EDITOR
+###########################################################################
+#### editor must not detach from launching shell (-f mandatory for gvim)
+#### default for linux: gvim -f
+# set editor {gvim -f -geometry 90x28}
+# set editor { xterm -geometry 100x40 -e nano }
+# set editor { xterm -geometry 100x40 -e pico }
+
+#### For Windows
+# set editor {notepad.exe}
+
+###########################################################################
+#### SHOW ERC INFO WINDOW (erc errors, warnings etc)
+###########################################################################
+#### default: 0 (can be enabled by menu)
+# set show_infowindow 0
+
+###########################################################################
+#### TCP CONNECTION WITH GAW
+###########################################################################
+#### set gaw address for socket connection: {host port}
+#### default: set to localhost, port 2020
+# set gaw_tcp_address {localhost 2020}
+
+###########################################################################
+#### XSCHEM LISTEN TO TCP PORT
+###########################################################################
+#### set xschem listening port; default: not enabled
+set xschem_listen_port 2021
+
+###########################################################################
+#### BESPICE WAVE SOCKET CONNECTION
+###########################################################################
+#### set bespice wave listening port; default: not enabled
+set bespice_listen_port 2022
+
+###########################################################################
+#### TCL FILES TO LOAD AT STARTUP
+###########################################################################
+#### list of tcl files to preload.
+# lappend tcl_files ${XSCHEM_SHAREDIR}/change_index.tcl
+lappend tcl_files ${XSCHEM_SHAREDIR}/ngspice_backannotate.tcl
+# lappend tcl_files $env(HOME)/.xschem/bindings.tcl
+###########################################################################
+#### WEB URL DOWNLOAD HELPER APPLICATION
+###########################################################################
+#### used to download files from web: default: {curl -f -s -O}
+# set download_url_helper {curl -f -s -O}
+# set download_url_helper {wget -N --quiet}
+
+###########################################################################
+#### XSCHEM TOOLBAR
+###########################################################################
+#### default: not enabled.
+set toolbar_visible 1
+set toolbar_horiz   1
+
+###########################################################################
+#### TABBED WINDOWS
+###########################################################################
+# default: not enabled. Interface can be changed runtime if only one window 
+# or tab is open.
+set tabbed_interface 1
+
+###########################################################################
+#### CASE INSENSITIVE SYMBOL LOOKUP
+###########################################################################
+## this option might be useful on filesystems that are case insensitive and
+## on designs ported from windows where case of file names does not matter.
+## if this option is set symbol lookup will be case insensitive,
+## so a symbol reference 'AMPLI.SYM' will match with 'ampli.sym' or
+## Amply.sym on disk. File system must be case insensitive for this to work,
+## like FAT32 or NTFS.
+## Do not set this option if you don't know what you are doing.
+## Default: not enabled (0)
+# set case_insensitive 1
+
+###########################################################################
+#### HIDE GRAPHS IF NO SPICE DATA LOADED
+###########################################################################
+## if enabled graphs will be hidden if no data is loaded.
+## default: not enabled (0)
+set hide_empty_graphs 0
+
+###########################################################################
+#### SHOW HIDDEN TEXTS
+###########################################################################
+## This option shows text objects even if they have attribute 'hide=true' set
+## default: 0 (not set) 
+# set show_hidden_texts 1
+
+###########################################################################
+#### LIVE BACKANNOTATION OF DATA AT CURSOR 2 (B) POSITION
+###########################################################################
+## if enabled will backannotate values in schematic at cursor 'b' position
+## in graph. Default: not enabled (0)
+set live_cursor2_backannotate 1
+