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You’re a what?

Which IRQ does COM1 commonly use?

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  1. Steven Simmons

    I cannot believe I STILL remember this. COM 1,3 use IRQ 4, COM 2,4 use 3. I/O addresses are 03F8, 02F8, 03E8, 02E8 for COM 1,2,3,4. Damn I am old.

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