add bee2-selectmap, to be dealt with later

[fleet.git] / bee2-selectmap / .svn / text-base / root.v.svn-base

diff --git a/bee2-selectmap/.svn/text-base/root.v.svn-base b/bee2-selectmap/.svn/text-base/root.v.svn-base
new file mode 100644 (file)
index 0000000..6034216
--- /dev/null
+++ b/bee2-selectmap/.svn/text-base/root.v.svn-base
@@ -0,0 +1,43 @@
+// megacz@cs.berkeley.edu,  public domain
+
+module root(clk,
+            read_empty, read_enable, read_data,
+            write_full, write_enable, write_data);
+
+  input clk;
+  input read_empty;
+  input write_full;
+  output read_enable;
+  output write_enable;
+  input  [7:0] read_data;
+  output [7:0] write_data;
+
+  reg read_enable_;
+  assign read_enable = read_enable_;
+  reg write_enable_;
+  assign write_enable = write_enable_;
+  reg [7:0] write_data_;
+  assign write_data = write_data_;
+
+  initial read_enable_ = 1;
+  initial write_enable_ = 0;
+
+  always @(posedge clk) begin
+
+    // if there's stuff to read and room to write, read a byte,
+    // increment it, and write it
+    if (!read_enable_ && !write_enable_ && !read_empty && !write_full) begin
+      read_enable_  <= 1;
+      write_enable_ <= 1;
+      write_data_   <= read_data + 1;
+
+    // else do nothing
+    end else begin
+      read_enable_  <= 0;
+      write_enable_ <= 0;
+
+    end
+
+  end
+
+endmodule