Date: Mon, 23 Jun 1997 08:35:58 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-hackers@freebsd.org (FreeBSD hackers) Cc: un_x@anchorage.net (Steve Howe) Subject: Re: direct access Message-ID: <19970623083558.FD45105@uriah.heep.sax.de> In-Reply-To: <Pine.BSF.3.96.970622210255.265I-100000@Journey2.mat.net>; from Chuck Robey on Jun 22, 1997 21:10:45 -0400 References: <Pine.BSF.3.95q.970622153100.15540A-100000@aak.anchorage.net> <Pine.BSF.3.96.970622210255.265I-100000@Journey2.mat.net>
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As Chuck Robey wrote: > It really sounds like you ought to go purchase either a beginners Unix > book, or maybe an operating systems textbook, depending on where your > interests lie. Also, Steve should look into the ports collection. bpatch for example can hex-edit arbitrary files including entire devices (the other available hex editors usually can't since they suck the entire device into memory first). For meaningful hex-editing of raw memory, read the handbook section about kernel debugging. Simple port IO is now also possible in DDB, albeit the entire collection of IO instructions should probably be available in a non-inlined fashion there. Of course, Steven, with your proven knowledge level, i would be more than careful in manipulating any bits in either memory or on a device (unless perhaps a DOS floppy). -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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