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From: slerner@sesame.UUCP (Simcha-Yitzchak Lerner)
Newsgroups: net.micro.pc
Subject: Re: Sidekick vs. Microsoft C
Message-ID: <365@sesame.UUCP>
Date: Wed, 16-Oct-85 03:25:09 EDT
Article-I.D.: sesame.365
Posted: Wed Oct 16 03:25:09 1985
Date-Received: Sat, 19-Oct-85 06:39:38 EDT
References: <962@vax2.fluke.UUCP> <298@graffiti.UUCP>
Distribution: net
Organization: Lotus Development Corp
Lines: 25

>.... 
> Sidekick won't run when MS-DOS is currently executing, to avoid re-entrancy
> problems. The BIOS is re-entrant, but MS-DOS isn't. 

Sorry, but many BIOS calls are NOT reentrant.  Try executing a char fetch in 
the middle of another char fetch.  Do it with the right timing and you can 
cause merry fun with the buffer pointers.

>.... 
> Workaround #3: Get CED.COM, which among other things replaces this particular
> MS-DOS call with its own version. It seems to be sufficiently re-entrant to
> avoid worrying SideKick (or maybe SK just doesn't recognise it as part of DOS).
I suspect that some methods of detecting DOS being active will indicate when
a replacement to dos is running.  Luck of the draw here.

-- 
Opinions expressed are public domain, and do not belong to Lotus
Development Corp.
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Simcha-Yitzchak Lerner

              {genrad|ihnp4|ima}!wjh12!talcott!sesame!slerner
                      {cbosgd|harvard}!talcott!sesame!slerner
                       talcott!sesame!slerner@harvard.ARPA