The only thing I have to do is driving as fast as possible a external FPGA by writing
with 5 bit addressing and WR and RD pins. Using one movx instructions to external ram greater 8k should do this. I think I dont need address latch because the RAM address space above 8k is left and gaps don't matter if I only use A9-A15. The internal programm flash is already 64k.

My 12Mhz clock will run on te serials because the serial lines are connected to a also 12Mhz driven Cypress EZUSBFX.

Thanks Wolfgang Rapp