Hi, In `vid.v' we have this memory origin set localparam Org = 18'b1101_1111_1111_0000_00; // DFF00: adr of vcnt=1023 But how does $DFF00 correspond to memory limit set by BootLoader.Mod? MemLim = 0E7EF0H; Many thanks. -- Tomas Kral <thomas.kral at email.cz>