监控程序在单板机上是控制各个部件工作的“大脑”。了解监控程序,不仅可以了解单板机是怎样工作的,还可以根据需要修改监控,以扩充单板机的控制功能。硬件究竟怎样对监控程序加密,我们又如何破密呢?在正常情况下,CPU的地址线(A_0,…A_(15))与ROM地址线(A′_0,…A′_(15))是由低(A_0)到高(A_(15))顺序对应的。我们可以将16根地址线所 The monitoring program is the “brain” that controls the operation of the various components on the single board computer. Understand the monitoring program, not only can understand how the single board machine works, but also can modify the monitoring as needed to expand the control function of the single board machine. How can the hardware actually encrypt the monitoring program and how can we break it? Under normal circumstances, the CPU’s address lines (A_0, ..., A_ (15)) and ROM address lines (A’_0, ... A ’ Is from low (A_0) to high (A_ (15)) corresponding to the order. We can put 16 address lines