Someone

halrun configs/sim/pyvcp_demo.hal

then run these halcmds...

halcmd: unlinkp pyvcp.button-sample
halcmd: linksp bit1 pyvcp.chbutton-sample
halcmd: loadrt hal_parport cfg="0x9800"
halcmd: loadrt threads name1=foo period1=1000000
halcmd: addf parport.0.write foo
halcmd: start
halcmd: linksp bit1 parport.0.pin-03-out