X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 0b - irq3

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INT 0B - IRQ3 - COM2 INTERRUPT
Notes:  the TOPS and PCnet adapters use this interrupt request line as an
          alternate
        on PS/2's, COM2 through COM8 share this interrupt on many PC's, COM4
          shares this interrupt
SeeAlso: INT 0C, INT 53

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