Mail Archives: djgpp/1997/06/27/10:18:42
From: | Jeff Weeks <pweeks AT execulink DOT com>
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Newsgroups: | comp.os.msdos.djgpp
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Subject: | port access in DJGPP
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Date: | Thu, 26 Jun 1997 12:57:10 -0400
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Organization: | Code X Software
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Lines: | 21
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Message-ID: | <33B29F66.204C3DD3@execulink.com>
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NNTP-Posting-Host: | ppp14.mercury.execulink.com
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Mime-Version: | 1.0
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To: | djgpp AT delorie DOT com
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DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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Hi everybody,
I've heard about how slow port access is, but now I have first hand
experience. I wrote some Ultrasound (GUS) code in DJGPP which works
exclusively using the GUS's base port, and it is very very slow.
I'm wondering, does DJGPP just back to real mode to do port access?
(forgive my limited knowledge of pmode). I tried using the alternate
cwsdpmi to run in ring 0, but port access didn't seem much faster. I
guess I use too many port operations (there are a ton of 'em).
Anyway, that's all I wanted to know.
Jeff
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