(Note that none of the following is legal advice.)<p>One tip on reading patent - ignore most of the diagrams and description, and go straight to the claims. The claims are the only valid part of the patent. In this case, all the static/dynamic RAM, signals, memory cache, and malloc stuffs are irrelevant and misdirection.<p>This patent has only 1 claim [1]. The claim has a series of elements making a number of conditions for the patent. Notice that semicolons separate each claim elements. That means these are AND-conditions. All these conditions need to be met to fit the patent. Also notice the colons. These list the sub-elements or sub-conditions.<p>Reading the claim. It seems to be a system with a number of processors of different kinds. There's some memory with input/output ports. The memory holds the instructions and data. The input/output ports of the processors connect (coupled) to the input/output ports of the memory to read the instructions and data. Do computation on the data based on the instruction. Spit out the result. The kinds of processors are: multiplier, arithmetic unit, arithmetic logic unit, and a bit manipulation unit. The processors run simultaneously.<p>To defeat this patent, you can list prior arts. This is the most damaging because it invalidates the whole patent. Or you can go by the claim conditions. You can either claim your product doesn't have any one of the kind of the processors (no bit manipulation), or the processor doesn't read instruction/data from memory (instructions are hard-coded or a processor gets its input from another processor), or the processor doesn't connect to the memory directly (via a bus or via a data switch or via special registers), or the processor doesn't do computation according to the instruction (e.g. a doubler always double the data), or your processors run serially in some fashion, etc.<p>And then there's the legal definition of the terms in the claim, such as what is a multiplier, an arithmetic unit, an ALU, what's a bit manipulation unit, and what's "coupling." This process is called claim construction and done by the court via precedents and the intents described in the description of the patent. Many times a patent lawsuit falls apart during the claim construction phase because the definition of the terms don't apply to the sued product.<p>[1] <a href="https://patents.google.com/patent/US6289434B1/en" rel="nofollow">https://patents.google.com/patent/US6289434B1/en</a>