Configurable cpu core that supports Z80, 8080 and gameboy instruction sets

this come from alter ,you can look and find it on line about h263.

使用verilog写的频率计，可切换档位(Frequency counter using verilog write switch stalls)

verilog 编写的ldpc编码，含有两个文件(LDPC written by Verilog)

FPGA控制外边led，并实现跑马灯等多种效果，用户可以自行控制(FPGA control outside led)

Top module name : SHIFTER (File name : SHIFTER.v) 2. Input pins: SHIFT [3:0], IN [15:0], SIGN, RIGHT. 3. Output pins: OUT [15:0]. 4. Input signals generated from test pattern are latched in one cycle and are synchronized at clock rising edge. 5. The SHIFT signal describes the shift number. The shift range is 0 to 15. 6. When the signal RIGHT is high, it shifts input data to right. On the other hand, it shifts input data to left. 7. When the signal SIGN is high, the input data is a signed number and it shifts with sign extension. However, the input data is an unsigned number if the signal SIGN is low. 8. You can only use following gates in Table I and need to include the delay information (Tplh, Tphl) in your design.

本文档对quartus与modelsim运用操作描述十分详细，对初学者，会有很大帮助！(Quartus and modelsim this document on the use of operations described in great detail, for beginners, there will be a great help!)

8051core-Verilog FPGA的51单片机内核源代码! -8051core-Verilog FPGA 51 Singlechip kernel source code!

RISC-V 芯片设计规范,很有参考价值，开源芯片设计必备参考资料，希望对大家有帮助。(The RISC-V Foundation is chartered to standardize and promote the open RISC-V instruction set architecture)

中科院VHDL学习资料，很好的东西，希望对大家有用-Chinese Academy of Sciences VHDL learning materials, a very good thing, everyone would like to be useful

资源描述 VHDL语言是一种用于电路设计的高级语言。它在80年代的后期出现。最初是由美国国防部开发出来供美军用来提高设计的可靠性和缩减开发周期的一种使用范围较小的设计语言 现在利用vhdl语言，通过原件例化语句，来编写一个数字时钟