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 ...

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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 ...

Ben Eater and others use an instruction processing sub-cycle where a given op code is executed as a sequence of microcode instructions. My thoughts (Aug 2019) on microcoded instructions such as those ...

My understanding was that a CPU microcode update is stored in non-volatile memory on the motherboard and is loaded by the BIOS or UEFI into volatile memory on the CPU during boot. And because the ...

In the ever-evolving landscape of technology, hardware stability is paramount for ensuring optimal performance in computing systems. Recently, Intel, one of the world’s leading semiconductor ...

The CPU is a simple stack virtual machine with a specialized reduced instruction set. Execution algorithm: The VM fetches an opcode from system memory pointed by CS:IP. There is a table of instruction ...

Infosec boffins have released a tool to decrypt and unpack the microcode for a class of low-power Intel CPUs, opening up a way to look at how the chipmaker has implemented various security fixes and ...

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 ...