Date: Tue, 19 Nov 1996 19:27:49 +0100 (MET) From: Emmanuel Duros <eduros@chouette.inria.fr> To: freebsd-hackers@freebsd.org Subject: Creating a device driv., Pb with outb, outw... Message-ID: <199611191827.TAA18620@chouette.inria.fr>
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Hi,
I am going to write a device driver for a communication card which is
a receive-only interface for satellite links.
First, I would like to write a peace of code outside the kernel (in user
context) that would intialize the adapter with a sequence of outb
functions to the correct interface address.
With a very simple program such as:
#include<machine/cpufunc.h>
void main(void){
outb( 0x300, 1 );
}
I always get a BUS ERROR. I also tried on the parallel port (0x378)
without success.
Any comments on this, why does this happen ?
I am using FreeBSD 2.2-961006-SNAP and I noticed there is no man on
these functions or on any low level functions, is this normal ?
Could you also reply to my personal Email ? Thanks...
Emmanuel
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