Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!sm.unisys.com!csun!srhqla!tcm
From: tcm@srhqla.UUCP (Tim Meighan)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Communications Hardware and Interrupt Processing
Keywords: interrupts, communications
Message-ID: <569@srhqla.UUCP>
Date: 4 Mar 89 01:41:20 GMT
References: <1220@sdcc15.ucsd.edu>
Reply-To: tcm@srhqla.UUCP (Tim Meighan)
Organization: Silent Radio, Los Angeles
Lines: 24

In article <1220@sdcc15.ucsd.edu> ww10bag@sdcc15.UUCP (David Etherton) writes:

>Could anyone recommend where I can find information concerning:
>
>	- I/O port assignments (AND USAGE) for all COM port-related
>	  items.
>	- Initialization procedures, along with any special tricks
>	  about interrupt processing for the UART chip.

Here is a book I HIGHLY recommend:                      

Compute!'s MAPPING THE IBM-PC

This is the single best source of hardware, interrupt, port, and timer
info for the PC that I have ever found.  And you'd never know it
by the title.  There's stuff in here that I have only found in INTEL
manuals.  And they explain it better, to boot.  However, this is more
a reference than a tutorial, so the "how to" stuff, while there, is
not real extensive.

Tim Meighan
SilentRadio

"Beware!  Your brain may no longer be the boss!"