基于FPGA与LM4550B的AC97软声卡VHDL语言驱动，版本2.0-FPGA-based soft and LM4550B the AC97 sound card driver VHDL language, version 2.0

OPB_AC97核心，支持国家的LM4549A AC97编解码器。这个核心中的AC97控制器提供了一个基于寄存器的AC97协议的串行接口。-the OPB_AC97 core developed to support the National LM4549A AC97 Codec. The AC97 controller contained in this core provides a register-based interface