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Halt and Catch Fire

The show is named after actual assembly instruction present in many CPUs that causes system to halt (and possibly overheat 🔥).

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February 20, 2022

The show is named after actual assembly instruction present in many CPUs that causes system to halt (and possibly overheat 🔥).

#Halt and Catch Fire #Halt and Catch Fire

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Halt and Catch Fire

In computer engineering, Halt and Catch Fire, known by the assembly mnemonic HCF, is an idiom referring to a computer machine code instruction that causes the computer's central processing unit (CPU) to cease meaningful operation, typically requiring a restart of the computer. It originally referred to a fictitious instruction in IBM System/360 computers, but later computer developers who saw the joke created real versions of this instruction for some machines. In the case of real instructions, the implication of this expression is that, whereas in most cases in which a CPU executes an unintended instruction the computer may still be able to recover, in the case of an HCF instruction there is, by definition, no way for the system to recover without a restart.

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