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module `VARIANT`INST_DECODE#(parameter STATE_SIZE=3)(input wire clk,input wire reset,input wire enable,input wire disable_ir,input wire fetch_op,input wire [STATE_SIZE:0] state,input wire [7:0] prog_data,output reg now_fetch_op,output reg [7:0] ir,output reg [1:0] length,output reg immediate,output reg absolute,output reg zero_page,output reg indirectx,output reg indirecty,output reg implied,output reg relative,output reg stack,output reg jsr,output reg jump,output reg jump_indirect,output reg brk,output reg rti,output reg rts,output reg invalid,output reg [1:0] ins_type,output reg [2:0] ctrl,output reg [2:0] dest,output reg [2:0] alu_op_a_sel,output reg [1:0] alu_op_b_sel,output reg alu_op_b_inv,output reg [1:0] alu_op_c_sel,output reg [1:0] idx_sel,output reg [2:0] alu_mode,output reg [4:0] alu_status_update,output reg [7:0] brn_value,output reg [7:0] brn_enable);reg [1:0] n_length;reg n_immediate;reg n_absolute;reg n_zero_page;reg n_indirectx;reg n_indirecty;reg n_implied;reg n_relative;reg n_stack;reg n_jsr;reg n_jump;reg n_jump_indirect;reg n_brk;reg n_rti;reg n_rts;reg n_invalid;reg [1:0] n_ins_type;reg [2:0] n_ctrl;reg [2:0] n_dest;reg [2:0] n_alu_op_a_sel;reg [1:0] n_alu_op_b_sel;reg [1:0] n_idx_sel;reg n_alu_op_b_inv;reg [1:0] n_alu_op_c_sel;reg [2:0] n_alu_mode;reg [4:0] n_alu_status_update;reg [7:0] n_brn_value;reg [7:0] n_brn_enable;always@(*)now_fetch_op = (state == `FETCH_OP) || fetch_op || implied || stack ;always@(posedge clk)if (reset || disable_ir)beginir <= 8'h00;length <= 2'b00;absolute <= 1'b0;immediate <= 1'b0;implied <= 1'b0;indirectx <= 1'b0;indirecty <= 1'b0;relative <= 1'b0;zero_page <= 1'b0;stack <= 1'b0;jump <= 1'b0;jump_indirect <= 1'b0;jsr <= 1'b0;brk <= 1'b0;rti <= 1'b0;rts <= 1'b0;ins_type <= `ins_type_none;alu_mode <= `alu_mode_add;alu_op_a_sel <= `alu_op_a_00;alu_op_b_sel <= `alu_op_b_00;alu_op_b_inv <= 1'b0;alu_op_c_sel <= `alu_op_c_00;idx_sel <= `idx_sel_00;alu_status_update <= `alu_status_update_none;brn_value <= 8'h00;brn_enable <= 8'h00;dest <= `dest_none;ctrl <= `ctrl_none;invalid <= 1'b0;endelseif((!enable) || (!now_fetch_op) )beginir <= ir ;length <= length ;absolute <= absolute ;immediate <= immediate ;implied <= implied ;indirectx <= indirectx ;indirecty <= indirecty ;relative <= relative ;zero_page <= zero_page ;stack <= stack ;jump <= jump ;jump_indirect <= jump_indirect ;jsr <= jsr ;brk <= brk ;rti <= rti ;rts <= rts ;ins_type <= ins_type ;alu_mode <= alu_mode ;alu_op_a_sel <= alu_op_a_sel ;alu_op_b_sel <= alu_op_b_sel ;alu_op_b_inv <= alu_op_b_inv ;alu_op_c_sel <= alu_op_c_sel ;idx_sel <= idx_sel ;alu_status_update <= alu_status_update ;brn_value <= brn_value ;brn_enable <= brn_enable ;dest <= dest ;ctrl <= ctrl ;invalid <= invalid ;endelsebeginir <= prog_data ;length <= n_length ;absolute <= n_absolute ;immediate <= n_immediate ;implied <= n_implied ;indirectx <= n_indirectx ;indirecty <= n_indirecty ;relative <= n_relative ;zero_page <= n_zero_page ;stack <= n_stack ;jump <= n_jump ;jump_indirect <= n_jump_indirect ;jsr <= n_jsr ;brk <= n_brk ;rti <= n_rti ;rts <= n_rts ;ins_type <= n_ins_type ;alu_mode <= n_alu_mode ;alu_op_a_sel <= n_alu_op_a_sel ;alu_op_b_sel <= n_alu_op_b_sel ;alu_op_b_inv <= n_alu_op_b_inv ;alu_op_c_sel <= n_alu_op_c_sel ;idx_sel <= n_idx_sel ;alu_status_update <= n_alu_status_update ;brn_value <= n_brn_value ;brn_enable <= n_brn_enable ;dest <= n_dest ;ctrl <= n_ctrl ;invalid <= n_invalid ;endalways @ (*)beginn_length = 2'b00;n_absolute = 1'b0;n_immediate = 1'b0;n_implied = 1'b0;n_indirectx = 1'b0;n_indirecty = 1'b0;n_relative = 1'b0;n_zero_page = 1'b0;n_stack = 1'b0;n_jump = 1'b0;n_jump_indirect = 1'b0;n_jsr = 1'b0;n_brk = 1'b0;n_rti = 1'b0;n_rts = 1'b0;n_ins_type = `ins_type_none;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_00;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_idx_sel = `idx_sel_00;n_alu_status_update = `alu_status_update_none;n_brn_value = 8'h00;n_brn_enable = 8'h00;n_dest = `dest_none;n_ctrl = `ctrl_none;n_invalid = 1'b0;case (prog_data)// implied`CLC_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h00;n_brn_enable = 8'h01;n_dest = `dest_none;end`CLD_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h00;n_brn_enable = 8'h08;n_dest = `dest_none;end`CLI_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h00;n_brn_enable = 8'h04;n_dest = `dest_none;end`CLV_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h00;n_brn_enable = 8'h40;n_dest = `dest_none;end`DEX_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`DEY_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`INX_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`INY_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`SEC_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h01;n_brn_enable = 8'h01;n_dest = `dest_none;end`SED_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h08;n_brn_enable = 8'h08;n_dest = `dest_none;end`SEI_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h04;n_brn_enable = 8'h04;n_dest = `dest_none;end`TAX_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`TAY_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`TXA_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`TYA_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`NOP_IMP:beginn_length = 2'b01;n_implied = 1'b1;n_dest = `dest_none;end`ASL_ACC:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_alu_a;end`LSR_ACC:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_alu_a;end`ROL_ACC:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_alu_a;end`ROR_ACC:beginn_length = 2'b01;n_implied = 1'b1;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_alu_a;end// immediate`ADC_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`CMP_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`CPX_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`CPY_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`EOR_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDA_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDX_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`LDY_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`ORA_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`SBC_IMM:beginn_length = 2'b10;n_immediate = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_imm;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end// zero_page`ADC_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`ASL_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`BIT_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_z67;n_dest = `dest_mem;end`CMP_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`CPX_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`CPY_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`DEC_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_ff;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`EOR_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`INC_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`LDA_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDX_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`LDY_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`LSR_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ORA_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`ROL_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ROR_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`SBC_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_mem;end`STA_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`STX_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`STY_ZPG:beginn_length = 2'b10;n_zero_page = 1'b1;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end// zero_page_indexed`ADC_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`ASL_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`CMP_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`DEC_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_ff;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`EOR_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`INC_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`LDA_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDY_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`LSR_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ORA_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`ROL_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ROR_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`SBC_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_mem;end`STA_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`STY_ZPX:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`LDX_ZPY:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`STX_ZPY:beginn_length = 2'b10;n_zero_page = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end// Branch`BCC_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`C] = 1'b1;n_brn_value[`C] = 1'b0;n_dest = `dest_none;end`BCS_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`C] = 1'b1;n_brn_value[`C] = 1'b1;n_dest = `dest_none;end`BNE_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`Z] = 1'b1;n_brn_value[`Z] = 1'b0;n_dest = `dest_none;end`BEQ_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`Z] = 1'b1;n_brn_value[`Z] = 1'b1;n_dest = `dest_none;end`BPL_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`N] = 1'b1;n_brn_value[`N] = 1'b0;n_dest = `dest_none;end`BMI_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`N] = 1'b1;n_brn_value[`N] = 1'b1;n_dest = `dest_none;end`BVC_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`V] = 1'b1;n_brn_value[`V] = 1'b0;n_dest = `dest_none;end`BVS_REL:beginn_length = 2'b10;n_relative = 1'b1;n_ctrl = `ctrl_branch;n_brn_enable[`V] = 1'b1;n_brn_value[`V] = 1'b1;n_dest = `dest_none;end// absolute`ADC_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`ASL_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`BIT_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_z67;n_dest = `dest_none;end`CMP_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`CPX_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`CPY_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`DEC_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_ff;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`EOR_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`INC_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`LDA_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDX_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`LDY_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`LSR_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ORA_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`ROL_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ROR_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`SBC_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`STA_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`STX_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_x;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`STY_ABS:beginn_length = 2'b11;n_absolute = 1'b1;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_y;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end// absolute_indexed`ADC_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`ASL_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`CMP_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`DEC_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_ff;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`EOR_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`INC_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`LDA_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDY_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_y;end`LSR_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ORA_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_mem;end`ROL_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfl;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`ROR_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_rmw;n_alu_mode = `alu_mode_sfr;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_mem;end`SBC_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`STA_ABX:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`ADC_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`CMP_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`EOR_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDA_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDX_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_x;end`ORA_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`SBC_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`STA_ABY:beginn_length = 2'b11;n_absolute = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end// indirectx`ADC_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`CMP_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`EOR_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDA_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`ORA_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`SBC_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`STA_IDX:beginn_length = 2'b10;n_indirectx = 1'b1;n_idx_sel = `idx_sel_x;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end// indirecty`ADC_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`AND_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_and;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`CMP_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_01;n_alu_status_update = `alu_status_update_nzc;n_dest = `dest_none;end`EOR_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_eor;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`LDA_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`ORA_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_orr;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`SBC_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b1;n_alu_op_c_sel = `alu_op_c_cin;n_alu_status_update = `alu_status_update_nzcv;n_dest = `dest_alu_a;end`STA_IDY:beginn_length = 2'b10;n_indirecty = 1'b1;n_idx_sel = `idx_sel_y;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end// stack`PHA_IMP:beginn_length = 2'b01;n_stack = 1'b1;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_acc;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_none;end`PHP_IMP:beginn_length = 2'b01;n_stack = 1'b1;n_ins_type = `ins_type_write;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_psr;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_none;n_dest = `dest_mem;end`PLA_IMP:beginn_length = 2'b01;n_stack = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_stk;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_nz;n_dest = `dest_alu_a;end`PLP_IMP:beginn_length = 2'b01;n_stack = 1'b1;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_stk;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_res;n_dest = `dest_none;end// jump`JMP_ABS:beginn_length = 2'b11;n_jump = 1'b1;n_ctrl = `ctrl_jmp;end// jump_indirect`JMP_IND:beginn_length = 2'b11;n_jump_indirect = 1'b1;n_ctrl = `ctrl_jmp_ind;end// jump_subroutine`JSR_ABS:beginn_length = 2'b11;n_jsr = 1'b1;n_ctrl = `ctrl_jsr;end// break// ?????????? Need to update alu_status at the end of this instruction`BRK_IMP:beginn_length = 2'b01;n_brk = 1'b1;n_ctrl = `ctrl_brk;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_psr;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_wr;n_brn_value = 8'h10; // BRK bit in psrn_brn_enable = 8'h10;n_dest = `dest_none;end// return for int`RTI_IMP:beginn_length = 2'b01;n_rti = 1'b1;n_ctrl = `ctrl_rti;n_ins_type = `ins_type_read;n_alu_mode = `alu_mode_add;n_alu_op_a_sel = `alu_op_a_00;n_alu_op_b_sel = `alu_op_b_opnd;n_alu_op_b_inv = 1'b0;n_alu_op_c_sel = `alu_op_c_00;n_alu_status_update = `alu_status_update_res;n_dest = `dest_none;end// return from sub`RTS_IMP:beginn_length = 2'b01;n_rts = 1'b1;n_ctrl = `ctrl_rts;enddefault:beginn_invalid = 1'b1;n_ins_type = `ins_type_none;endendcaseend // always @ (*)endmodule
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