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 ...

Since there are basically no side effects to enabling an Opcode cache, it’s recommended that all production sites utilize one. On larger PHP applications like WordPress or Drupal, performance ...

Microcode is a feature of many modern CPUs. The CPU runs several “microcode” instructions to process a single opcode. For the Intel 8086, there are 512 micro instructions, each with 21 bits.