Subject: Re: KDENABIO vs i386_iopl() [was XF86 3.1.2e scanpci fails on 1.2-beta]
To: None <>
From: Mike Long <>
List: port-i386
Date: 08/27/1996 10:25:28
>From: (Frank van der Linden)
>Date: Tue, 27 Aug 1996 11:17:09 +0200 (MET DST)

>i386_iopl has been in there since 1.1; 1.0 had a hack that gave you
>I/O port access if you opened /dev/io (minor device 14 of the mm driver)
>for writing. I believe it was also temporary linked to minor dev 0 (/dev/mem),
>but never in an official release. So if you want to make it work on 1.0,
>opening /dev/io for writing first should do it.

FYI, /dev/io still works in 1.2_BETA.  Some code of mine, which I
haven't bothered to port to i386_iopl() yet, uses it.  You may need
COMPAT_10 in your config.
Mike Long <>     <URL:>
VLSI Design Engineer         finger for PGP public key
Analog Devices, CPD Division          CCBF225E7D3F7ECB2C8F7ABB15D9BE7B
Norwood, MA 02062 USA       (eq (opinion 'ADI) (opinion 'mike)) -> nil