Xref: utzoo comp.realtime:1109 comp.os.os9:1424
Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcsun!ukc!cf-cm!rhl
From: rhl@computing-maths.cardiff.ac.uk (Robert Hartill)
Newsgroups: comp.realtime,comp.os.os9
Subject: Is polling possible with OS9000 device drivers
Message-ID: <1991Jan16.174652.10867@computing-maths.cardiff.ac.uk>
Date: 16 Jan 91 17:46:52 GMT
Sender: rhl@computing-maths.cardiff.ac.uk (Robert Hartill)
Reply-To: rhl@computing-maths.cardiff.ac.uk (Robert Hartill)
Followup-To: comp.realtime
Organization: University of Wales College of Cardiff, Cardiff, WALES, UK.
Lines: 26

Sorry to OS9 newsgroup readers if this is the wrong place to ask.. is there
a comp.os.os9000 ?, does comp.os.os9 also discuss os9000 ?

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A friend of mine who is new to OS9000 wants to write a device driver for a
programmable I/O controler which does not raise an interrupt on the host PC.

He says that OS9000 doesn't directly support device drivers that poll devices.
He's come up with some sort of solution which he is not entirely happy with.

Sorry I can't give any more details than this,
Any comments ?

While i'm talking OS9000, can anyone recomend a good book on writing device
drivers.

Thanks in advance,
		Robert.
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::     Robert Hartill, Dept Of Computing Mathematics, UWCC, Cardiff, UK.     ::
::          e-mail : rhl@cm.cf.ac.uk         Fax : 0222 371921               ::
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An expert is a man who has made all the mistakes which can be made in a very 
narrow field.  -D.N.H. Bohr
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