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From: mir@opera.chorus.fr (Adam Mirowski)
Newsgroups: comp.sys.ibm.pc.misc
Subject: Re: self re-booting program!
Message-ID: <8742@chorus.fr>
Date: 20 Mar 91 14:13:36 GMT
References: <1991Mar14.144740.1@uwav1.u.washington.edu> <1991Mar18.081748.25848@ktibv.uucp> <1991Mar19.095731.6269@ukpoit.co.uk>
Sender: mir@chorus.fr
Reply-To: mir@opera.chorus.fr (Adam Mirowski)
Organization: Chorus systemes, Paris, France
Lines: 27

%% >   How about a small program jumping directly to the boot address.
%% >   This address is on all machines FFFF:0000.
%% >   just make a small pascal or c program and include
%% >   JMP FFFF:0000
%% >   This will do the trick.
%%
%% I tried this:
%% 
%% main(){
%%    JMP FFFF:00000;
%% 
%%    }
%% 
%% but it didn't work, is there an .h file I should include ?? :-)


Try this one:

#define FAR     far
#define JMP     int FAR (* jump)() = (void FAR *) 0xFFFF0000; (*jump) ();


Didn't try it on a PC, though.  You could get a warning like
'Code has no effect' at compilation time.
-- 
Adam Mirowski,  mir@chorus.fr (FRANCE),  tel. +33 (1) 30-64-82-00 or 74
Chorus systemes, 6, av.Gustave Eiffel, 78182 Saint-Quentin-en-Yvelines CEDEX