{
  signal:
  [
    {name: 'clock', wave: 'pP|.|.',  node: '...c..', phase:.5},
    {name: 'idle',  wave: '0..1..',  node: '...b.'},
    {name: 'abort', wave: '01...0',  node: '.a....'},
  ],
    edge: [ 'a~>b see note']
  ,config: { hscale: 2}
  ,head:   {text:'abort to idle'}
  ,foot:   {
    text:'Note: Once asserted, hold abort until idle. Deassert abort whenever.'}
}