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- Newsgroups: comp.sys.atari.st.tech
- Path: sparky!uunet!mnemosyne.cs.du.edu!nyx!ilepore
- From: ilepore@nyx.cs.du.edu (Ian Lepore)
- Subject: Re: Interrupt interference
- Message-ID: <1992Aug18.001227.7077@mnemosyne.cs.du.edu>
- Sender: usenet@mnemosyne.cs.du.edu (netnews admin account)
- Organization: University of Denver, Dept. of Math & Comp. Sci.
- References: <sourada.714027685@vincent1.iastate.edu>
- Date: Tue, 18 Aug 92 00:12:27 GMT
- Lines: 18
-
- Organization: Nyx, Public Access Unix at U. of Denver Math/CS dept.
- X-Disclaimer: Nyx is a public access Unix system run by the University
- of Denver for the Denver community. The University has neither
- control over nor responsibility for the opinions of users.
-
- > the IPL is lowered to 3 to allow other interupts...
-
- It may take more than that. The interupts are also prioritized within
- the 68901 MFP chip. If MFP autovector interupt 12 is running, for example,
- then any interupts coming in on vectors 0-11 will be left pending until the
- ISR for vector 12 clears the inservice bit. I don't have my MFP docs handy,
- so I'm not sure this affects you -- I vaguely remember that the 200hz timer
- is pretty low in the MFP priority list.
-
- --
- - Ian
- (void *) where prohibited by law
-
-