All computers have number of I/O devices attached to them such as printers, scanners, floppy drives, hard disks, and just about every other component you can think of Each of these devices requires a unique I/O
address. An I/O address is the hexadecimal address of an area of memory that is used by the peripheral device to exchange information with other device in the system. You can think of it as a kind of mail slot for the device.
Not only does each component require an I/O address, but each component must use a unique I/O address. This means that when a new device such as a network card or modem is installed in the system, I cannot be assigned an I/O address already being used by another device, If two devices are assigned the same I/O address, one or both devices will fail to function.
address. An I/O address is the hexadecimal address of an area of memory that is used by the peripheral device to exchange information with other device in the system. You can think of it as a kind of mail slot for the device.
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I/O Address
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Device
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1F0-1F8
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Hard disk Controller
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200-207
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Game I/O
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278-27F
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Parallel Port (LPT2)
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2F8-2FF
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Serial Port (COM2)
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320-32F
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Hard drive Controller,8 bit ISA
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378-37F
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Parallel Port (LPT1)
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3B0-3BF
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Monochrome Graffics Adapter
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3D0-3DF
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Color Graphics Adapter
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3F0-3F7
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Floppy Drive controller
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3F8-3FF
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Serial Port (COM1)
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Not only does each component require an I/O address, but each component must use a unique I/O address. This means that when a new device such as a network card or modem is installed in the system, I cannot be assigned an I/O address already being used by another device, If two devices are assigned the same I/O address, one or both devices will fail to function.
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