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The term bootstrap comes from the process of initializing the circuit or computer from a power off-on transition. The term is akin to picking one's self up by one's boot straps.

In an ordinary logic circuit, this entails making sure that the circuit starts off in the right state following power on, usually by having a resistor charge a capacitor from VCC, forming a RESET signal. Often, there is a diode across that resistor, so that short power off-on sequences force a reset.

Taking this further, into the computer, the RESET signal causes the processor to execute a bootstrap program out of ROM that initializes everything and loads the rest of the program from disk. (Some imbedded controllers do not have disks, but the principle is the same.)

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Q: Why is the name bootstrap given to bootstrap circuit?
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