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Video gamers know about cheat codes, but assembly language programmers are often in search of undocumented instructions. One way to find them is to map out all of a CPU’s opcodes and where there are ...

Abstract: Microcode is a technique that is used to implement internal state machine sequencing in different type of controllers addressing a large range of different applications. It can be used to ...

Abstract: We have been developing ReNA as a DNN accelerator for the edge, which is controlled by directly specifying control signals for each circuit by microcode instructions. The current control ...

Continuing his reverse-engineering of the Intel 8087, [Ken Shirriff] covers the conditional tests that are implemented in the microcode of this floating point processing unit (FPU). This microcode ...