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- From: liljeber@hydra.Helsinki.FI (Mika Liljeberg)
- Subject: Re: 386 device drivers: machine-independent I/O timing?
- In-Reply-To: jhood@smoke.marlboro.vt.us's message of Mon, 11 Jan 1993 12: 02:30 GMT
- Message-ID: <LILJEBER.93Jan11190510@hydra.Helsinki.FI>
- Lines: 17
- Sender: news@klaava.Helsinki.FI (Uutis Ankka)
- Organization: Department of Computer Science, University of Helsinki, Finland
- References: <1993Jan11.120230.1322@smoke.marlboro.vt.us>
- Date: Mon, 11 Jan 1993 17:05:10 GMT
-
- In article <1993Jan11.120230.1322@smoke.marlboro.vt.us> jhood@smoke.marlboro.vt.us (Lord Yertle) wrote:
- >
- > Sometime in the deep murky mists of time (within the last two years,
- > anyway) somebody from Compaq or Dell posted an article about I/O
- > delays in (I think) Unix device drivers. He suggested reading or
- > writing some I/O port on the motherboard I/O bus to get ~ 1 us delays
- > for I/O access timing, but I can't find the article (which I thought I
- > saved) or remember what exactly he was suggesting.
-
- I didn't see the article, but Linux uses outb on port 0x80 for I/O
- delays. It seems to work very well.
-
- Mika
- --
- Mika Liljeberg Email: liljeber@hydra.Helsinki.FI
- Helsinki University Mika.Liljeberg@Helsinki.FI
- Dept. of Computer Science
-