Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!uccba!ucqais!blubaugh
From: blubaugh@ucqais.uc.edu (Dr. Blubaugh)
Newsgroups: comp.sys.amiga.tech
Subject: Multi serial/parallel ports
Keywords: Serial parallel ports
Message-ID: <2502@ucqais.uc.edu>
Date: 17 Oct 90 03:46:30 GMT
Organization: U.C. Dept. of Chemistry
Lines: 17


    How are multiple serial boards supposed to work??  I've got an
A3000 and the developer notes,AmigaMail,2.0 autodocs and all and I've
even built a multi-serial board with autoconfig and have a preliminary
device to handle the ports.  I understand how the DOS level stuff is
going to work with additional ports but I just don't grasp how the
hardware board makes its extra units known to the system.  I know from
the AmigaMail article that the port.handler,serial.device (why not
parallel.device too?) and preferences were rewritten to accomodate
multiple ports but what is supposed to happen when serial.device unit 4
is opened?  Could someone explain how exec decides what code, if any,
is really going to get control.  This surely has been worked out since
C= has an 8 port card ready to sell.
    Is the board supposed to add its own serial.device to the exec list
of devices and hope that the first (C=) device looks for it to pass
control when it isn't their unit, or is there a special call
Hi_I_am_adding_units_to_this_exec_device that isn't documented yet.