Something
public text v1 · immutableloadusr -W halvcp halui.vcp
# if you want it to do two things (connect to parport, and drive halui)
# newsig signalname bit
# linksp signalname pinname1
# linksp signalname pinname2
newsig button1.out bit
linksp button.estop-reset
linksp parport.0.pin-10-out