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From: dipto@umbc3.UMD.EDU (Dipto Chakravarty )
Newsgroups: comp.lang.c,comp.sys.ibm.pc
Subject: Help needed with RAM resident program on Microsoft `C'
Message-ID: <506@umbc3.UMD.EDU>
Date: Mon, 12-Oct-87 21:33:15 EDT
Article-I.D.: umbc3.506
Posted: Mon Oct 12 21:33:15 1987
Date-Received: Wed, 14-Oct-87 05:22:06 EDT
Reply-To: dipto@umbc3.umd.edu (Dipto Chakravarty (CMSC-GRAD))
Organization: University of Maryland, Baltimore County
Lines: 21
Xref: mnetor comp.lang.c:4860 comp.sys.ibm.pc:8998

Hi folks, 
	  I could use some of your wisdom on this problem.  I am trying to
write a RAM resident / Terminate Stay Resident (TSR) program on an IBM AT,
which is supposed to come back every 20-25 secs and print a message on the
screen, stating that the program segment is RAM resident. This routine is 
to be written in Microsoft `C'. Any idea/wisdom as to how do I go about 
implementing this. 

	  In assembly one would set the origin by doing `ORG 100' and then 
subsequently altering the vectors; but how can we do it from C ? 

	  For your information the main program accesses the 8253 timer 
chip; subsequently processes the value. I want that if this value is valid
the RAM resident program pops a message on the screen.

	  I WOULD GREATLY APPRECIATE ALL THE HELP  that I can get on this 
topic. Please send me e-mail or post it on the net. Thanks in advance.

Dipto Chakravarty			      ARPANET: dipto@umbc3.umd.edu
Administrative Computing Services	       BITNET: dipto@umbc2.umd.edu
U. of Maryland, Baltimore County.