COM1

COM2

COM3

COM4

LPT1

LPT2

LPT3
IRQ4

IRQ3

IRQ4

IRQ3

IRQ7

IRQ5

IRQ 5
or 7
03F8 - 3FF

02F8 - 2FF

03E8 - 3EF

02E8 - 2EF

0378 - 37F

0278 - 27F

03BC - 3BF
PORT
IRQ
I/O ADDRESS
Standard COM Port IRQs & Addresses
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Globalbytes.net
COM Ports are Serial. LPTx Ports are Parallel.
I/O Address listed in Hexadecimal.