通用存储器 包括各种类型存储器的VHDL描述，如FIFO，双

通用存储器 包括各种类型存储器的VHDL描述，如FIFO，双口RAM等VHDL代码库

--  The Free IP Project
--  VHDL Free-RAM Core
--  (c) 1999-2000, The Free IP Project and David Kessner
--
--
--  FREE IP GENERAL PUBLIC LICENSE
--  TERMS AND CONDITIONS FOR USE, COPYING, DISTRIBUTION, AND MODIFICATION
--
--  1.  You may copy and distribute verbatim copies of this core, as long
--      as this file, and the other associated files, remain intact and
--      unmodified.  Modifications are outlined below. 
--  2.  You may use this core in any way, be it academic, commercial, or
--      military.  Modified or not. 
--  3.  Distribution of this core must be free of charge.  Charging is
--      allowed only for value added services.  Value added services
--      would include copying fees, modifications, customizations, and
--      inclusion in other products.
--  4.  If a modified source code is distributed, the original unmodified
--      source code must also be included (or a link to the Free IP web
--      site).  In the modified source code there must be clear
--      identification of the modified version.
--  5.  Visit the Free IP web site for documentation and additional