vc (Vector Clear)
vc[n | p | r | v] number[,number [,...]]
The vc command clears the specified interrupt vector and reinstalls the previous interrupt vector.
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n
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Removes the beep from traps that beep when encountered; does not clear the traps.
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p
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Clears protected-mode vectors only.
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r
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Clears real-mode vectors only.
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v
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Clears virtual 8086 (V86) mode vectors only.
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number
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Specifies the interrupt vector to clear.