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From: Paul Crawford <psc@sat.dundee.ac.uk>
To: Frederic Herman <fherman@Inferential.com>,
	Mateusz Viste <mateusz@viste.fr>,
	linux-msdos@vger.kernel.org
Subject: Re: Illegal op ff e8 2c in newer dosemu
Date: Wed, 06 May 2015 23:05:09 +0100	[thread overview]
Message-ID: <554A9015.9010705@sat.dundee.ac.uk> (raw)
In-Reply-To: <554A5B5B.3040805@Inferential.com>

There is a difference in 64-bit vs 32-bit, and it is more than just the 
problems of no vm86() call so hardware interrupts are not properly 
handled (aside - is that fixed now/soon?).

I found I could use the MS C6.0 compiler and the 'PWB' (programmers 
workbench) for compiling the DOSD software OK under 32-bit Linux, but 
not under 64-bit as the dosemu instance would simple exit, as if exitemu 
was called (but it wasn’t). While I know MS had a lot of dubious and 
undocumented calls, the difference I saw was definitely a memory issue, 
and maybe related to the various XMS/EMS extenders that were needed at 
one time, when 640k was no longer enough for everyone...

Regaeds,
Paul
-- 
  Dr. Paul S. Crawford
  c/o Satellite Station
  University of Dundee
  Small's Wynd, Dundee, DD1 4HN
  Email: psc@sat.dundee.ac.uk
  The University of Dundee is a Scottish Registered Charity, No. SC015096
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  reply	other threads:[~2015-05-06 22:05 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-06 15:16 Illegal op ff e8 2c in newer dosemu Martin Hicks
2015-05-06 16:09 ` Andrew Bird
2015-05-06 17:17   ` John R. Sowden
2015-05-06 18:05     ` Mateusz Viste
2015-05-06 18:20       ` Frederic Herman
2015-05-06 22:05         ` Paul Crawford [this message]
2015-05-07 12:52           ` Martin Hicks
2015-05-07 13:00             ` Paul Crawford
2015-05-08  6:18               ` solarflow99
2015-05-06 18:33       ` John R. Sowden

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