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1. Introduction

This HOWTO document describes programming hardware I/O ports and waiting for small periods of time in user-mode Linux programs running on the Intel x86 architecture. This document is a descendant of the very small IO-Port mini-HOWTO by the same author.

This document is Copyright 1995-2000 Riku Saikkonen. See the Linux HOWTO copyright for details.

If you have corrections or something to add, feel free to e-mail me (

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