Oops sorry, I remembered the brightness bit but forgot it was for both colors at the same time. Ahhh yes and the flash bit :) thanks. The final piece of the vi

Oops sorry, I remembered the brightness bit but forgot it was for both colors at the same time. Ahhh yes and the flash bit :) thanks. The final piece of the video output was the border color (on one of the out ports of the z80). By syncing with the vertical retrace you could 'draw' into the border (most tape loading routines changed the border color as bits were read from the tape to give the familiar border stripes when games loaded from tape).