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- Newsgroups: comp.os.os2.programmer
- Path: sparky!uunet!gatech!usenet.ins.cwru.edu!agate!iat.holonet.net!uupsi!psinntp!digex.com!terryfry
- From: terryfry@access.digex.com (Terry Fry)
- Subject: Re: How to crash OS/2 1.2 & 1.3?
- Message-ID: <1992Aug29.044807.15808@access.digex.com>
- Organization: Express Access Online Communications, Greenbelt, Maryland USA
- References: <1992Aug28.131233.26834@klaava.Helsinki.FI> <1992Aug28.150650.719@ccsvax.sfasu.edu>
- Date: Sat, 29 Aug 1992 04:48:07 GMT
- Lines: 18
-
- In article <1992Aug28.150650.719@ccsvax.sfasu.edu> z_kupkams@ccsvax.sfasu.edu writes:
-
- > No Problem, Just write a device Driver. Or another possible choice
- >is the use an IOPL segment under 1.2 to write to the Interupt Controller.
- >
- >DosPortAccess under 1.x might not allow the second choice, but it's worth a
- >shot.
-
- DosPortAccess is part of the API, however it was never implemented.
-
- Run a program that writes to a set of ports in an IOPL segment,
- then call DosPortAcess restricting access to these ports, and write
- again. Nothing is going to happen, no protection fault.
-
- I can't remember why IBM never finished its implementation, and
- I havn't remmebered where I read that it doesn't do anything.
-
- Any IBM'ers want to shed some light?
-