Overview: "Local" I/O Operation

 Last reviewed: September 18, 1996
Article ID: Q103883

LOCAL I/O OPERATION

When an application requests I/O services, the underlying operating system calls device driver software that is resident in BIOS on most MS-DOS PCs. Device driver software is written to communicate with the device controller card, and can thus forward the I/O request to firmware that is resident on the controller.

The device controller then provides the required control signals to the device.

KBCategory: kbnetwork
KBSubCategory: msna



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Last reviewed: September 18, 1996
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