Anti-jamming method for computer central processing unit

Abstract

The invention discloses an anti-jamming method for a computer central processor, which comprises the following steps: 1, during the initialization of computer CPU, the maximum address occupied by the program thereof is read into an additional program maximum address register PCMAX; and 2, before the CPU fetches order codes according to the content of a program counter PC, the contents of the program counter PC and the program maximum address register PCMAX are input into an additional program address comparator PCP for comparison, wherein, when the former is equal to or smaller than the latter, the CPU executes normally, if not, the program address comparator PCP outputs an interruption signal to an additional non-maskable interruption source USINT to allow the non-maskable interruption source USINT to produce interruption and to lead the CPU into the interruption service program. The invention has a simple hardware design, less steps, is simple and convenient to be operated, and provides a simple solution to the problem that program interferes with a blank program storage area and an idle program storage area.

Description

technical field [0001] The invention relates to the field of computer application technology, in particular to an anti-jamming method for a computer central processing unit. Background technique [0002] The anti-interference of computer control system is an important issue that must be considered in the design of computer software and hardware, and the anti-interference of program counter PC is commonly known as the "program runaway" problem, and it is one of the main problems that need to be solved in the design. Existing common methods to solve "program runaway" include setting a "Watchdog" monitor, setting a program pointer trap, or using a reset command, etc. Although the above method can reset the system when the program is disturbed, enters an endless loop or hardware failure, the following main problems exist in the above, that is, the running status of the program cannot be monitored in real time, resulting in the inability to detect the interference of the program ...

AI Technical Summary

Problems solved by technology

Although the above method can reset the system when the program is disturbed, enters an endless loop or hardware failure, the following main problems exist in the above, that is, the running status of the program cannot be monitored in real time, resulting in the inability to detect the interference of the program in time and deal with the interference accordingly method is also unreasonable

[0003] Invention patent application CN1677363 published on October 5, 2005 discloses a computer CPU anti-interference design method, although the operation of the program can be monitored in real time through this method, the interference of the program can be found in time and the interference can be dealt with in a reasonable way. However, the hardware implementation of this method is more complicated