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From: pgh@stl.stc.co.uk (P.G.Hamer)
Newsgroups: comp.os.os9
Subject: Writing device drivers
Summary: help
Message-ID: <4310@stl.stc.co.uk>
Date: 22 Apr 91 11:21:23 GMT
Sender: news@stl.stc.co.uk
Reply-To: "P.G.Hamer" <pgh@stl.stc.co.uk>
Organization: STC Technology Limited, London Road, Harlow, Essex, UK
Lines: 13

I am a novice OS/9 user on a 68020 box, no 68K assembler experience. So far
I have been able to stay in C and everything is going well.

BUT we need to run a small C routine in response to externally generated
interrupt every 10mS. 

From the manual it looks like we have to write a (minimal) device handler
to do this. [Polling is definitely out, there is a fair bit of concurrency.]

Does anybody have code for a small device driver we could hack? Or other
advice to offer. 

Regards, Peter