RQDX3 as third controller under RT-11

From: Megan <mbg_at_world.std.com>
Date: Mon Aug 23 00:44:11 1999

Please remember that simply copying the device handler DU to
another one (DA or VI, depending who suggested it) and setting
the CSR and VECTOR are not sufficient when running under XM.
The MSCP device driver creates an extended-memory region which
is called 'DU $ ' (the spaces are significant). Only one
driver can use said region. Another driver will have to use
another region.

So, in order to make this work completely under XM, I've usually
copied the DUX.SYS handler to another one (DAX.SYS), done the
appropriate SET DA CSR=nnn VECTOR=mmm commands, then used SIPP
to go in and look for all occurrances of the Rad50/DU/ and changed
them to Rad50/DA/.

                                        Megan Gentry
                                        Former RT-11 Developer

| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
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Received on Mon Aug 23 1999 - 00:44:11 BST

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