在汇编程序中很难控制图形的变化，要用到好多的寄存器，本例就是用汇编画贝塞尔曲线-in the compilation process is difficult to control the graphics change, we had to use a lot of the register, this example is using Bezier curve drawing compilation

直接数字合成器中贝塞尔低通滤波器设计。非常适应-Direct digital synthesizer Bessel low-pass filter design. Is to adapt