基本设计要求

1 在屏幕上显示一个适当大小的圆形，再圆形道上均匀的分配着60个点，代表1秒—60秒的位置，凡是5倍的点应当比其他的大。

2 以圆中心为轴，画一条斜线代表秒针，采用定时中断方式，每过1秒钟，秒针移动一个位置。

3 定时源可以使用试验箱上的8253。

4 按“ESC”之后，结束演示。

- The basic design requests 1 on the screen to demonstrate a
suitable size the circular, the circular on even assignment 60 spots,
are representing 1 second 鈻?0 second positions again, every is 5
time of spots must compared to other big. 2 take the round center as
an axis, draws an oblique line to represent the second hand, uses
fixed time severs the way, each 1 second, the second hand has moved a
position. 3 fixed time sources may in the field test box 8,253. After
4 presses \"ESC\", the conclusion demonstrates.