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Can Linux Use More than 3 Serial Ports by Sharing Interrupts?

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Can Linux Use More than 3 Serial Ports by Sharing Interrupts?

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Profile photo of LindseyMyer LindseyMyer

Yes, but you won’t be able to use simultaneously two ordinary ports which share an interrupt (without some trickery). This is a limitation of the ISA Bus architecture. See the Serial HOWTO for information about possible solutions and workarounds for this problem.

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