You're right. It looks like there was a problem with the "lei" instruction, where L pins were not disabled if EN2=0. I'll get rid of the workaround, I think Space Invader is ok as well now.

*edit* indeed, Space Invader looks ok now. h2hbaskb still has display bugs without the workaround though.

Last edited by hap; 12/19/16 08:48 PM.