Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!sun-barr!ames!xanth!indri!dogie.macc.wisc.edu!uwvax!astroatc!nicmad!madnix!schaut
From: schaut@madnix.UUCP (Rick Schaut)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Help with sharing memory in DOS...
Summary: Try the ICA.
Message-ID: <709@madnix.UUCP>
Date: 15 Jul 89 04:02:36 GMT
References: <2752@blake.acs.washington.edu>
Reply-To: schaut@madnix.UUCP (Rick Schaut)
Distribution: usa
Organization: ARP Software, Madison, WI
Lines: 28

In article <2752@blake.acs.washington.edu> mtsu@blake.UUCP (Montana State) writes:
>I have written a TSR that reads characters off of the comm port, filters them,
>and saves the important information in a buffer allocated inside the TSR.
>
>Suppose the buffer name is 'aldsdata', TSR name is 'x100'...  Now I want to
>write a program to yank the data out of 'aldsdata', from the foreground...
>
>How do I find the address of 'aldsdata' inside the TSR??

Have the TSR place the addres of 'aldsdata' in the 'Intra-application
Communications Area" (ICA).  This is a sixteen byte area located at
address 0040:00F0H.  I suggest that you also include a checksum so that
the foreground program will know if the pointer has been corrupted.
(The source fo this information is _The New Peter Norton Programmer's
Guide to the IBM PC & PS/2_, p. 62)


>You know, this whole problem would be trivial if DOS was Unix...

But then you wouldn't have TC 2.0 to play with.  Real world choices are
never easy.


-- 
   Richard Schaut     Madison, WI              Madison: an alternative
ArpaNet: madnix!schaut@cs.wisc.edu                      to reality.
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