Those of us who use h4th may have noticed that when using an inverse screen the furthest column to the right always remains "uninverted" (see Picture).
One idea put forward suggested a timing problem being that H4th seems to be a 50 hz clone of the American 60hz Pluri-forth by Tree software.
I always thought it to be a problem with ROM image we all seem to use being culled from Eighty One and that it was tweaked in some way as the emulator doesn't behave like real hardware video wise, but a forum member who has the genuine Skywave ROM posted pics showing it to behave in the same way so that put that to bed.
Long story short I put the new ULA in my forth zeddy to bring it up to scratch video wise with my others and yay all characters now inverted and no blank right hand column.
Happy days.
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)