[erewhon@dsg.com (Steven Byrnes) writes:]
>I was trying to write a little program that output to some of the I/O ports
>but didn't have any luck. From browsing the machine-dependent server code,
>I see that it is possible. Are only servers allowed to do it? What is the
>minimal incantation necessary to write to (or read from) an I/O port? Am I
>doing something wrong?
main()
{
enable_io(<low-port>, <high-port>);
outportb(<port>, <val>);
}
Make sure you're in sys.sys group, otherwise the kernel won't allow the
io_enable(). I could've included error checking in the example, but you
*did* say minimal!
Andy
Received on Fri Apr 28 07:33:46 1995
This archive was generated by hypermail 2.1.8 : Thu Sep 22 2005 - 15:12:27 PDT