clk clk cpuaddr[15:0] cpuaddr[15:0] HEXRADIX mreq_n mreq_n m1_n m1_n iorq_n iorq_n rd_n rd_n wr_n wr_n we2_n_dly we2_n_dly rfsh_n rfsh_n cpudin[7:0] cpudin[7:0] HEXRADIX cpudout[7:0] cpudout[7:0] HEXRADIX SRAM label 128 128 255 230 230 230 sram_addr[20:0] sram_addr[20:0] HEXRADIX sram_we_n sram_we_n sram_data[7:0] sram_data[7:0] HEXRADIX