those are examples to help u learn about VHDL and how it can control VGA screen

这个是VGA显示的硬件电路设计，是用Verilog HDL语言写的，供给硬件电路设计者们去用-This is a VGA display hardware circuit design, is written in Verilog HDL language, the supply of hardware circuit designers to use

学习VGA的程序，可以运行，对学习VHDL很有帮助。-Learning the VGA procedures, you can run, the VHDL helpful in learning.