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-rw-r--r--manual/APPNOTE_011_Design_Investigation/memdemo.v2
1 files changed, 1 insertions, 1 deletions
diff --git a/manual/APPNOTE_011_Design_Investigation/memdemo.v b/manual/APPNOTE_011_Design_Investigation/memdemo.v
index babc24e29..b39564ddc 100644
--- a/manual/APPNOTE_011_Design_Investigation/memdemo.v
+++ b/manual/APPNOTE_011_Design_Investigation/memdemo.v
@@ -11,7 +11,7 @@ reg [3:0] mem [0:3];
always @(posedge clk) begin
for (i = 0; i < 4; i = i+1)
mem[i] <= mem[(i+1) % 4] + mem[(i+2) % 4];
- { s2, s1 } = d ? { s1, s2 } ^ d : 0;
+ { s2, s1 } = d ? { s1, s2 } ^ d : 4'b0;
mem[s1] <= d;
y <= mem[s2];
end