After I had a lot of problems with some low-quality breadboards I buyed some new boards.
I think the best boards are in the MB-102 package with in the middle cutted power lines at the sides:
I got other breadboards from different chinese dealers with very low quality. The contacts have very low force:
Now I rebuilt the LC64 with only one 65c22 and a 128k-SRAM to minimize the wireing.
I added adress-buffers to add later the AVR for the TFT.