Date: Tue, 7 Nov 2000 14:32:41 -0600 From: Dan Nelson <dnelson@emsphone.com> To: Howard Blue <hblue@oaklandnet.com> Cc: questions@FreeBSD.ORG Subject: Re: C Programming using FreeBSD Message-ID: <20001107143241.A4569@dan.emsphone.com> In-Reply-To: <3A085E29.4BA73D22@oaklandnet.com>; from "Howard Blue" on Tue Nov 7 11:55:22 GMT 2000 References: <3A085E29.4BA73D22@oaklandnet.com>
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In the last episode (Nov 07), Howard Blue said:
> How to use outb( ) and inb( ) with gcc and FreeBSD?
>
> int main()
> {
> /* Getting accesss to io port. */
> if (ioperm(BASEPORT, 3, 1) {perror("ioperm"); exit(1);}
>
> again:
> outb(0, BASEPORT);
> sleep(1);
> outb(0xFF, BASEPORT);
> sleep(1);
> printf("Testing...\n");\
> goto again;
> }
>
> What changes would be necessary for a simillar program to work with
> FreeBSD?
#include <machine/cpufunc.h>, call i386_set_ioperm() to enable access
to an i/o port, and swap the arguments to outb.
--
Dan Nelson
dnelson@emsphone.com
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