Subversion Repositories a-z80

// Copyright (C) 1991-2013 Altera Corporation

// Your use of Altera Corporation's design tools, logic functions 

// and other software and tools, and its AMPP partner logic 

// functions, and any output files from any of the foregoing 

// (including device programming or simulation files), and any 

// associated documentation or information are expressly subject 

// to the terms and conditions of the Altera Program License 

// Subscription Agreement, Altera MegaCore Function License 

// Agreement, or other applicable license agreement, including, 

// without limitation, that your use is for the sole purpose of 

// programming logic devices manufactured by Altera and sold by 

// Altera or its authorized distributors.  Please refer to the 

// applicable agreement for further details.

// PROGRAM              "Quartus II 64-Bit"

// VERSION              "Version 13.0.1 Build 232 06/12/2013 Service Pack 1 SJ Web Edition"

// CREATED              "Fri Oct 31 20:27:41 2014"

module decode_state(

        ctl_state_iy_set,

        ctl_state_ixiy_clr,

        ctl_state_ixiy_we,

        ctl_state_halt_set,

        ctl_state_tbl_clr,

        ctl_state_tbl_ed_set,

        ctl_state_tbl_cb_set,

        ctl_state_alu,

        clk,

        address_is_1,

        ctl_repeat_we,

        in_intr,

        in_nmi,

        nreset,

        in_halt,

        table_cb,

        table_ed,

        table_xx,

        use_ix,

        use_ixiy,

        in_alu,

        repeat_en

);

input wire      ctl_state_iy_set;

input wire      ctl_state_ixiy_clr;

input wire      ctl_state_ixiy_we;

input wire      ctl_state_halt_set;

input wire      ctl_state_tbl_clr;

input wire      ctl_state_tbl_ed_set;

input wire      ctl_state_tbl_cb_set;

input wire      ctl_state_alu;

input wire      clk;

input wire      address_is_1;

input wire      ctl_repeat_we;

input wire      in_intr;

input wire      in_nmi;

input wire      nreset;

output reg      in_halt;

output wire     table_cb;

output wire     table_ed;

output wire     table_xx;

output wire     use_ix;

output wire     use_ixiy;

output wire     in_alu;

output wire     repeat_en;

reg     DFFE_instNonRep;

reg     DFFE_instIY1;

reg     DFFE_inst4;

reg     DFFE_instED;

reg     DFFE_instCB;

wire    SYNTHESIZED_WIRE_0;

wire    SYNTHESIZED_WIRE_4;

wire    SYNTHESIZED_WIRE_3;

assign  in_alu = ctl_state_alu;

assign  table_cb = DFFE_instCB;

assign  table_ed = DFFE_instED;

assign  use_ix = DFFE_inst4;

assign  repeat_en =  ~DFFE_instNonRep;

assign  SYNTHESIZED_WIRE_4 = ctl_state_tbl_clr | ctl_state_tbl_ed_set | ctl_state_tbl_cb_set;

assign  use_ixiy = DFFE_instIY1 | DFFE_inst4;

assign  table_xx = ~(DFFE_instED | DFFE_instCB);

always@(posedge clk or negedge nreset)

begin

if (!nreset)

        begin

        DFFE_inst4 <= 0;

        end

else

if (ctl_state_ixiy_we)

        begin

        DFFE_inst4 <= SYNTHESIZED_WIRE_0;

        end

end

assign  SYNTHESIZED_WIRE_0 = ~(ctl_state_iy_set | ctl_state_ixiy_clr);

assign  SYNTHESIZED_WIRE_3 = in_nmi | in_intr;

always@(posedge clk or negedge nreset)

begin

if (!nreset)

        begin

        DFFE_instCB <= 0;

        end

else

if (SYNTHESIZED_WIRE_4)

        begin

        DFFE_instCB <= ctl_state_tbl_cb_set;

        end

end

always@(posedge clk or negedge nreset)

begin

if (!nreset)

        begin

        DFFE_instED <= 0;

        end

else

if (SYNTHESIZED_WIRE_4)

        begin

        DFFE_instED <= ctl_state_tbl_ed_set;

        end

end

always@(posedge clk or negedge nreset)

begin

if (!nreset)

        begin

        in_halt <= 0;

        end

else

        begin

        in_halt <= ~in_halt & ctl_state_halt_set | in_halt & ~SYNTHESIZED_WIRE_3;

        end

end

always@(posedge clk or negedge nreset)

begin

if (!nreset)

        begin

        DFFE_instIY1 <= 0;

        end

else

if (ctl_state_ixiy_we)

        begin

        DFFE_instIY1 <= ctl_state_iy_set;

        end

end

always@(posedge clk or negedge nreset)

begin

if (!nreset)

        begin

        DFFE_instNonRep <= 0;

        end

else

if (ctl_repeat_we)

        begin

        DFFE_instNonRep <= address_is_1;

        end

end

endmodule