# Linux & Com ports

**URL:** <https://boards.straightdope.com/t/linux-com-ports/8546>\
**Category:** Factual Questions\
**Created:** [March 14, 2000, 9:04pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546 "2000-03-14T21:04:00Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Tinker\_Grey](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/tinker_grey/32/8136_2.png) [@Tinker\_Grey](https://boards.straightdope.com/u/Tinker_Grey)\
**Post date:** [March 14, 2000, 9:04pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546/1 "2000-03-14T21:04:00Z")

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If one is writing a C program in a Linux environment on IBM-compatible PC, how does one control the 8250-compatible COM port?

Thanks,

Tinker

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**Author:** ![TheNerd](https://avatars.discourse-cdn.com/v4/letter/t/858c86/32.png) [@TheNerd](https://boards.straightdope.com/u/TheNerd)\
**Post date:** [March 14, 2000, 9:35pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546/2 "2000-03-14T21:35:00Z")

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This question would probably get more responses at a linux related forum. Might I suggest the OS forum at [anandforums.gisystech.com](http://anandforums.gisystech.com) ?

And my guess is that there is a special device in the /dev directory.

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**Author:** ![Baraqiyal](https://avatars.discourse-cdn.com/v4/letter/b/ecccb3/32.png) [@Baraqiyal](https://boards.straightdope.com/u/Baraqiyal)\
**Post date:** [March 14, 2000, 9:48pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546/3 "2000-03-14T21:48:00Z")

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Click \<a href=“[http://www.falconweb.com/~linuxrx/HOWTO/sunsite-sources/mini/IO-Port-Programming.html](http://www.falconweb.com/~linuxrx/HOWTO/sunsite-sources/mini/IO-Port-Programming.html)”\>Here\</a\>.  
In a nutshell, you INCLUDE io.h and use the functions included therein.

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**Author:** ![Baraqiyal](https://avatars.discourse-cdn.com/v4/letter/b/ecccb3/32.png) [@Baraqiyal](https://boards.straightdope.com/u/Baraqiyal)\
**Post date:** [March 14, 2000, 9:51pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546/4 "2000-03-14T21:51:00Z")

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\<A HREF=“[http://www.falconweb.com/~linuxrx/HOWTO/sunsite-sources/mini/IO-Port-Programming.html](http://www.falconweb.com/~linuxrx/HOWTO/sunsite-sources/mini/IO-Port-Programming.html)” TARGET=\_blank\>Here\</A\>.

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**Author:** ![Baraqiyal](https://avatars.discourse-cdn.com/v4/letter/b/ecccb3/32.png) [@Baraqiyal](https://boards.straightdope.com/u/Baraqiyal)\
**Post date:** [March 14, 2000, 9:53pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546/5 "2000-03-14T21:53:00Z")

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Okay, I have a question of my own. How do you do those frigging hyperlinks?

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**Author:** ![Tinker\_Grey](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/tinker_grey/32/8136_2.png) [@Tinker\_Grey](https://boards.straightdope.com/u/Tinker_Grey)\
**Post date:** [March 14, 2000, 10:02pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546/6 "2000-03-14T22:02:00Z")

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Thanks all! I’ll look into those sites.

Baraqiyal: If the link below is correct, click the reply with quote to see how!  
[I hope this works](http://www.falconweb.com/~linuxrx/HOWTO/sunsite-sources/mini/IO-Port-Programming.html)

Tinker

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**Author:** ![Squee](https://avatars.discourse-cdn.com/v4/letter/s/ba9def/32.png) [@Squee](https://boards.straightdope.com/u/Squee)\
**Post date:** [March 14, 2000, 10:10pm UTC](https://boards.straightdope.com/t/linux-com-ports/8546/7 "2000-03-14T22:10:00Z")

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**Baraqiyal** , HTML has been disabled on this board. You have to use [UBB coding](http://boards.straightdope.com/ubb/ubbcode.html) to make links.

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“Penises don’t belong in the mouth, girls and boys. You’ve got the wrong hole there. Just like you wouldn’t shove pizza up your nose.”  
-From the **Brother Jed** flyer-