[2840] in comp.os.os2.announce archive
PROGRAMMING: Port I/O at WARP 13- Engage! (device I/O)
daemon@ATHENA.MIT.EDU (Alger Pike)
Mon Apr 28 06:18:00 1997
To: os2ann.DISCUSS@bloom-picayune.MIT.EDU
Date: Wed, 23 Apr 1997 12:47:01 GMT
From: alger@avenger.mri.psu.edu (Alger Pike)
Reply-To: alger@avenger.mri.psu.edu (Alger Pike)
Reply-to: alger@avenger.mri.psu.edu
[Followups directed to comp.os.os2.programmer.misc]
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I have broken the PORT I/O speed barrier. The long awaited 32bit iopl is now
up and online. This article explains how to do PORT I/O directly from your
32-bit ring 3 application. This method can be up to three times faster than
the current call gate method employed by WFASTIO$. When speed really counts
this can be a life saver.
If you are interested drop by http://avenger.mri.psu.edu/os2page.html .
Also check out all the other info I have on I/O under OS/2:
Using TESTCFG$
16-bit IOPL segements
Device Drivers- Including the Hello World Device Driver
Call gate I/O
the New Direct I/O method
Meeting all of your Data Acquisition needs.
Alger
Alger Pike Alger@avenger.mri.psu.edu
http://avenger.mri.psu.edu
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