oc8051_decoder.v

verilog code,about oc8051

              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_ANL_DC : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_ANL_B : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_ANL_NB : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_CJNE_D : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_CJNE_C : begin
              ram_rd_sel = `OC8051_RRS_DC;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_CLR_B : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_CPL_B : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_DEC_D : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_DIV : begin
              ram_rd_sel = `OC8051_RRS_B;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_DJNZ_D : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_INC_D : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_INC_DP : begin
              ram_rd_sel = `OC8051_RRS_DPTR;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_JB : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_SO2;
              comp_sel =  `OC8051_CSS_BIT;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b1;
            end
          `OC8051_JBC : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_BIT;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b1;
            end
/*          `OC8051_JC : begin
              ram_rd_sel = `OC8051_RRS_PSW;
              pc_wr = eq;
              pc_sel = `OC8051_PIS_SO1;
              comp_sel =  `OC8051_CSS_CY;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end*/
          `OC8051_JMP_D : begin
              ram_rd_sel = `OC8051_RRS_DPTR;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
    
          `OC8051_JNB : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_SO2;
              comp_sel =  `OC8051_CSS_BIT;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b1;
            end
/*          `OC8051_JNC : begin
              ram_rd_sel = `OC8051_RRS_PSW;
              pc_wr = !eq;
              pc_sel = `OC8051_PIS_SO1;
              comp_sel =  `OC8051_CSS_CY;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_JNZ : begin
              ram_rd_sel = `OC8051_RRS_ACC;
              pc_wr = !eq;
              pc_sel = `OC8051_PIS_SO1;
              comp_sel =  `OC8051_CSS_AZ;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_JZ : begin
              ram_rd_sel = `OC8051_RRS_ACC;
              pc_wr = eq;
              pc_sel = `OC8051_PIS_SO1;
              comp_sel =  `OC8051_CSS_AZ;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end*/
          `OC8051_LCALL :begin
              ram_rd_sel = `OC8051_RRS_DC;
              pc_wr = `OC8051_PCW_Y;
              pc_sel = `OC8051_PIS_I16;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_LJMP : begin
              ram_rd_sel = `OC8051_RRS_DC;
              pc_wr = `OC8051_PCW_Y;
              pc_sel = `OC8051_PIS_I16;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_MOV_D : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_MOV_DD : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_MOV_BC : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_MOV_CB : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_MOVC_DP :begin
              ram_rd_sel = `OC8051_RRS_DPTR;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_MOVC_PC : begin
              ram_rd_sel = `OC8051_RRS_DC;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_MOVX_PA : begin
              ram_rd_sel = `OC8051_RRS_DC;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_MOVX_AP : begin
              ram_rd_sel = `OC8051_RRS_DC;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_MUL : begin
              ram_rd_sel = `OC8051_RRS_B;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_ORL_D : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_ORL_AD : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_ORL_CD : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_ORL_B : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_ORL_NB : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_Y;
              stb_i = 1'b1;
              bit_addr = 1'b1;
            end
          `OC8051_POP : begin
              ram_rd_sel = `OC8051_RRS_SP;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_PUSH : begin
              ram_rd_sel = `OC8051_RRS_D;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b1;
              bit_addr = 1'b0;
            end
          `OC8051_RET : begin
              ram_rd_sel = `OC8051_RRS_SP;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;
              bit_addr = 1'b0;
            end
          `OC8051_RETI : begin
              ram_rd_sel = `OC8051_RRS_SP;
              pc_wr = `OC8051_PCW_N;
              pc_sel = `OC8051_PIS_DC;
              comp_sel =  `OC8051_CSS_DC;
              rmw = `OC8051_RMW_N;
              stb_i = 1'b0;