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自己写的<<梁祝>>歌曲,主要改变歌谱,就可以实现任意的歌曲

VERSION 6
BEGIN SCHEMATIC
    BEGIN ATTR DeviceFamilyName "spartan2"
        DELETE all:0
        EDITNAME all:0
        EDITTRAIT all:0
    END ATTR
    BEGIN NETLIST
        SIGNAL XLXN_1
        SIGNAL XLXN_2
        SIGNAL XLXN_3(6:0)
        SIGNAL XLXN_4(4:0)
        SIGNAL XLXN_5(3:0)
        SIGNAL wx(2:0)
        SIGNAL q(6:0)
        SIGNAL XLXN_8
        SIGNAL clk
        SIGNAL sp
        SIGNAL XLXN_9
        PORT Output wx(2:0)
        PORT Output q(6:0)
        PORT Input clk
        PORT Output sp
        BEGIN BLOCKDEF fpq4hz
            TIMESTAMP 2007 4 12 7 35 8
            RECTANGLE N 64 -64 320 0 
            LINE N 64 -32 0 -32 
            LINE N 320 -32 384 -32 
        END BLOCKDEF
        BEGIN BLOCKDEF song
            TIMESTAMP 2007 4 12 11 43 46
            RECTANGLE N 64 -192 320 0 
            LINE N 64 -160 0 -160 
            LINE N 64 -32 0 -32 
            LINE N 320 -160 384 -160 
            LINE N 320 -96 384 -96 
            RECTANGLE N 320 -108 384 -84 
            LINE N 320 -32 384 -32 
            RECTANGLE N 320 -44 384 -20 
        END BLOCKDEF
        BEGIN BLOCKDEF ymq
            TIMESTAMP 2007 4 12 7 43 12
            RECTANGLE N 64 -64 320 0 
            LINE N 64 -32 0 -32 
            RECTANGLE N 0 -44 64 -20 
            LINE N 320 -32 384 -32 
            RECTANGLE N 320 -44 384 -20 
        END BLOCKDEF
        BEGIN BLOCKDEF xzq
            TIMESTAMP 2007 4 12 7 40 6
            RECTANGLE N 64 -192 320 0 
            LINE N 64 -160 0 -160 
            LINE N 64 -96 0 -96 
            RECTANGLE N 0 -108 64 -84 
            LINE N 64 -32 0 -32 
            RECTANGLE N 0 -44 64 -20 
            LINE N 320 -160 384 -160 
            RECTANGLE N 320 -172 384 -148 
            LINE N 320 -32 384 -32 
            RECTANGLE N 320 -44 384 -20 
        END BLOCKDEF
        BEGIN BLOCKDEF fp01ms
            TIMESTAMP 2007 4 12 7 32 28
            RECTANGLE N 64 -64 320 0 
            LINE N 64 -32 0 -32 
            LINE N 320 -32 384 -32 
        END BLOCKDEF
        BEGIN BLOCK XLXI_2 fpq4hz
            PIN CLK clk
            PIN CP XLXN_2
        END BLOCK
        BEGIN BLOCK XLXI_3 song
            PIN clk4m clk
            PIN clk4 XLXN_2
            PIN speaker sp
            PIN digit(6:0) XLXN_3(6:0)
            PIN zero(4:0) XLXN_4(4:0)
        END BLOCK
        BEGIN BLOCK XLXI_5 ymq
            PIN A(3:0) XLXN_5(3:0)
            PIN Q(6:0) q(6:0)
        END BLOCK
        BEGIN BLOCK XLXI_6 xzq
            PIN clk XLXN_8
            PIN d(6:0) XLXN_3(6:0)
            PIN z(4:0) XLXN_4(4:0)
            PIN qq(3:0) XLXN_5(3:0)
            PIN wx(2:0) wx(2:0)
        END BLOCK
        BEGIN BLOCK XLXI_7 fp01ms
            PIN CLK clk
            PIN CP XLXN_8
        END BLOCK
    END NETLIST
    BEGIN SHEET 1 3520 2720
        BEGIN INSTANCE XLXI_2 480 1152 R0
        END INSTANCE
        BEGIN INSTANCE XLXI_3 944 1120 R0
        END INSTANCE
        BEGIN INSTANCE XLXI_6 1552 1120 R0
        END INSTANCE
        BEGIN INSTANCE XLXI_5 2000 992 R0
        END INSTANCE
        BEGIN BRANCH XLXN_2
            WIRE 864 1120 896 1120
            WIRE 896 1088 896 1120
            WIRE 896 1088 944 1088
        END BRANCH
        BEGIN BRANCH XLXN_3(6:0)
            WIRE 1328 1024 1552 1024
        END BRANCH
        BEGIN BRANCH XLXN_4(4:0)
            WIRE 1328 1088 1552 1088
        END BRANCH
        BEGIN BRANCH XLXN_5(3:0)
            WIRE 1936 960 2000 960
        END BRANCH
        BEGIN BRANCH wx(2:0)
            WIRE 1936 1088 2112 1088
        END BRANCH
        BEGIN BRANCH q(6:0)
            WIRE 2384 960 2448 960
        END BRANCH
        IOMARKER 2112 1088 wx(2:0) R0 28
        IOMARKER 2448 960 q(6:0) R0 28
        BEGIN BRANCH XLXN_8
            WIRE 944 768 1536 768
            WIRE 1536 768 1536 960
            WIRE 1536 960 1552 960
        END BRANCH
        IOMARKER 272 768 clk R180 28
        BEGIN BRANCH sp
            WIRE 1328 960 1376 960
        END BRANCH
        IOMARKER 1376 960 sp R0 28
        BEGIN INSTANCE XLXI_7 560 800 R0
        END INSTANCE
        BEGIN BRANCH clk
            WIRE 272 768 448 768
            WIRE 448 768 560 768
            WIRE 448 768 448 960
            WIRE 448 960 448 1120
            WIRE 448 1120 480 1120
            WIRE 448 960 496 960
            WIRE 496 960 880 960
            WIRE 880 960 944 960
        END BRANCH
    END SHEET
END SCHEMATIC