Newsgroups: sci.electronics
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!ahenden
From: ahenden@magnus.acs.ohio-state.edu (Arne A Henden)
Subject: 16550
Message-ID: <1991May6.171901.21249@magnus.acs.ohio-state.edu>
Summary: need help on interrupt structure 
Keywords: 16550 UART interrupts 
Sender: news@magnus.acs.ohio-state.edu
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Organization: The Ohio State University
Date: Mon, 6 May 1991 17:19:01 GMT
Lines: 11

Wouldn't you know it, just when all the threads regarding
replacing an 8250 with a 16550 get deleted from our server,
we get involved in an equivalent project?
  We are replacing the 16450's on our 4-port serial card with
16550's because of PC/NFS's habit of turning off interrupts
for extended periods of time.  Anyway, the 16550 works just
fine in 16450 mode, but as soon as we put it in 550 mode it
no longer creates interrupts.
  Would someone who has worked with the 550, or who has saved
the prior posts regarding this chip, give us a reply?  Thanks.
Arne Henden