Some time back I made a 23/15 pin VGA adapter which worked really well except when in 31kHz DblPal mode, when after a while the screen would 'tear'. I initially put this down to overheating. However, I since found out that it's a problem that affects rev 1D.4 & 2D boards only.
Is this caused by the well documented 'timing issues', or is it something else entirely? If it is something else - is there an effective cure (besides not running in DblPal)?
TIA.
Dr Dekker
