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Writing Device Drivers
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Chapter 15

Drivers for Character Devices

A character device does not have physically addressable storage media, such as tape drives or serial ports, where I/O is normally performed in a byte stream. This chapter describes the structure of a character device driver, focusing in particular on entry points for character drivers. In addition, this chapter describes the use of physio(9F) and aphysio(9F) in the context of synchronous and asynchronous I/O transfers.

This chapter provides information on the following subjects:

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  Published under the terms fo the Public Documentation License Version 1.01. Design by Interspire