Import LinuxCNC source tree

configs/by_interface/parport/stepper/sim_pinout.hal

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+# standard pinout config file for 3-axis steppers
+# using a parport for I/O
+#
+# first load the parport driver
+loadrt hal_speaker
+#
+# next connect the parport functions to threads
+# write outputs last
+addf speaker.0.write base-thread 1
+#
+# finally connect physical pins to the signals
+net Xstep => speaker.0.pin-03-out
+net Xdir  => speaker.0.pin-02-out
+net Ystep => speaker.0.pin-05-out
+net Ydir  => speaker.0.pin-04-out
+net Zstep => speaker.0.pin-07-out
+net Zdir  => speaker.0.pin-06-out
+
+# create a signal for the estop loopback
+net estop-loop iocontrol.0.user-enable-out => iocontrol.0.emc-enable-in
+
+# create signals for tool loading loopback
+net tool-prep-loop iocontrol.0.tool-prepare => iocontrol.0.tool-prepared
+net tool-change-loop iocontrol.0.tool-change => iocontrol.0.tool-changed