Re: programowe sterowanie LPT

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#60237

From: Adam Wysocki
Date: Thu, 27 Oct 2005 07:51

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Spinacz biurowy, Jacek Czerwinski <x@y.z.pl>!

>> maska = 1 << numerbitu; (0=pin2, 1=pin3 itd. do 7=pin9)
>> outb (inb(port) | maska, port);    /* jedynka */
>> outb (inb(port) & ~maska, port);   /* zero */
> 
> Maska na portach może ale nie musi chodzić,

Na bardzo starych kernelach.

> 'inb' może dawać efekt uboczny na konkretnym chipie IO i referencji 
> C nic do tego.

Jaki efekt uboczny?

-- 
Adam Wysocki :: www.gophi.rotfl.pl :: GG: 1234 :: Fidonet: 2:480/138
nie mam zamiaru gszebac we wnetszu 15 latek :D (C) RusH @ 21.04.2003
W prezencie dla spamerów: sofbypcwux@cmvamw.al gfernt@kxh.adi.muy.et

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Path: mbox-mo1.pugleaf.net!news-archive.icm.edu.pl!newsfeed.gazeta.pl!news.chmurka.net!spamtrap.chmurka.net!gophi
From: gophi.at.chmurka.net@nospam.invalid (Adam Wysocki)
Newsgroups: pl.comp.os.linux.programowanie
Subject: Re: programowe sterowanie LPT
Date: Thu, 27 Oct 2005 07:51:34 +0000 (UTC)
Organization: ...far away, on the other side... (2:480/138)
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