8051内核的hdl代码，实际上是verilog格式不过上载页面只有一个vhdl选择，值得一读， 里面对仿真和验证的说明很有含金量...

模拟地铁自动售票机选票、付款、取票、找零等功能，包含软件仿真和硬件响应，可供仿真测试和FPGA验证。(Analog subway ticket vending machine ballots, payment, tickets, give change and other features, including software simulation and hardware response for simulation and FPGA verification test.)

Verilog实现数据映射，解决CPM调制中的比特流向符号的转化(Implement of data mapping with Verilog)

Aurora协议是一款高带宽、低成本、可扩展、框架简洁、适合点对点串行数据传输的协议。(Aurora protocol is a high-bandwidth, low-cost, scalable, simple framework for point to point serial data transfer protocol.)

本文使用实例描述了在 FPGA/CPLD 上使用 VHDL 进行分频器设 计，包括偶数分频、非 50％占空比和 50％占空比的奇数分频、半整数 （N+0.5）分频、小数分频、分数分频以及积分分频。所有实现均可 通过 Synplify Pro 或 FPGA 生产厂商的综合器进行综合，形成可使 用的电路，并在 ModelSim 上进行验证。 -This article describes the use of examples in the FPGA/CPLD prescaler to use VHDL to design, including the even-numbered sub-frequency, non-50 duty cycle and 50 duty cycle of the odd-numbered sub-frequency, semi-integer (N+ 0.5) sub-frequency, fractional-N, as well as scores of sub-band frequency points. All can realize through the Synplify Pro or FPGA manufacturers integrated synthesizer to form a circuit can be used and verified in the ModelSim on.

RS码的FPGA实现，verilog语言形式，好参考资料(FPGA realization of RS code, verilog language form, a good reference)

PS2键盘控制器的VHDL源码，用FPGA直接读取键盘的输入并显示。(PS2 keyboard controller VHDL source code, with a direct FPGA to read keyboard input and displayed.)

VHDL Handbook by HARDI Electronics AB

由VHDL 语言实现的DA0832器利用的是QUARTUES环境已经得到验证-By the VHDL language uses the DA0832 is QUARTUES environment has been tested

FPGA上的一个半加器实例程序，通过测试，可以直接运行在fpga开发板上。(One and a half adder example on FPGA program, through the test, can be run directly on the FPGA development board)

用vhdl语言生成锯齿波，数据可自行改变(Sawtooth wave with vhdl language generation, the data can change by itself)