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+README.md
+=========
+This dir is where the vendor specific Verilog memory model should be
+stored.
+
+The memory used is the [Microchip
+23K640](https://www.microchip.com/wwwproducts/en/23A640) a 64kbit,
+SPI-connected serial SRAM.
+
+The Verilog memory model can be downloaded from that webpage or [by
+clicking on this link](http://ww1.microchip.com/downloads/en/DeviceDoc/23x640_Verilog_Model.zip).
+
+Download and unzip the file in this directory. This should produce two
+files, 23A640.v and 23K640.v. The one needed for simulation is 23K640.v