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/* ============================================================================
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(C) 2007 Robert Finch
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All rights reserved.
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bcPSGNoteOutMux.v
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Version 1.0
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This source code is available for evaluation and validation purposes
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only. This copyright statement and disclaimer must remain present in
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the file.
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NO WARRANTY.
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THIS Work, IS PROVIDEDED "AS IS" WITH NO WARRANTIES OF ANY KIND, WHETHER
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EXPRESS OR IMPLIED. The user must assume the entire risk of using the
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Work.
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IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
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INCIDENTAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES WHATSOEVER RELATING TO
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THE USE OF THIS WORK, OR YOUR RELATIONSHIP WITH THE AUTHOR.
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IN ADDITION, IN NO EVENT DOES THE AUTHOR AUTHORIZE YOU TO USE THE WORK
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IN APPLICATIONS OR SYSTEMS WHERE THE WORK'S FAILURE TO PERFORM CAN
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REASONABLY BE EXPECTED TO RESULT IN A SIGNIFICANT PHYSICAL INJURY, OR IN
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LOSS OF LIFE. ANY SUCH USE BY YOU IS ENTIRELY AT YOUR OWN RISK, AND YOU
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AGREE TO HOLD THE AUTHOR AND CONTRIBUTORS HARMLESS FROM ANY CLAIMS OR
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LOSSES RELATING TO SUCH UNAUTHORIZED USE.
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Selects from one of five waveforms for output. Selected waveform
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outputs are anded together. This is approximately how the
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original SID worked.
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Spartan3
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Webpack 9.1i xc3s1000-4ft256
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36 LUTs / 21 slices / 11ns
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============================================================================ */
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module PSGNoteOutMux(s, a, b, c, d, e, o);
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parameter WID = 12;
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input [4:0] s;
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input [WID-1:0] a,b,c,d,e;
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output [WID-1:0] o;
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wire [WID-1:0] o1,o2,o3,o4,o5;
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assign o1 = s[4] ? e : {WID{1'b1}};
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assign o2 = s[3] ? d : {WID{1'b1}};
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assign o3 = s[2] ? c : {WID{1'b1}};
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assign o4 = s[1] ? b : {WID{1'b1}};
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assign o5 = s[0] ? a : {WID{1'b1}};
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assign o = o1 & o2 & o3 & o4 & o5;
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endmodule
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