Solution to 32-bit Code Port I/O Problem

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#2984

From: David Feustel
Date: Mon, 16 Nov 1992 23:20

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It's just been brought to my attention that the i/o bitmap can be used
to enable i/o instructions for selected ports in 32-bit mode as well
as in virtual 86 mode. Is there a way in os/2 for an application
to get i/o permission for specific ports when running 32-bit code?
This would eliminate the need for a ring change to execute i/o
instructions and would speed up real-time control routines.
-- 
Dave Feustel N9MYI <feustel@netcom.com>
 
If convicted felons can't own firearms, then why in Hell
do we let GE make nuclear weapons?

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Message-ID: <1992Nov16.232042.26902@netcom.com>

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Newsgroups: comp.os.os2.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!sgiblab!spool.mu.edu!umn.edu!csus.edu!netcom.com!feustel
From: feustel@netcom.com (David Feustel)
Subject: Solution to 32-bit Code Port I/O Problem
Message-ID: <1992Nov16.232042.26902@netcom.com>
Organization: DAFCO: OS/2 Software Support & Consulting
Date: Mon, 16 Nov 1992 23:20:42 GMT
Lines: 11