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- $Id: NSD-Future 1.2 1996/10/06 09:01:17 heinz Exp $
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-
- Future Directions
- =================
-
- What are the future directions for NSD? Currently the items
- mentioned in the following paragraphs are under consideration. They
- are phrased as suggestions to think about. Obviously, thoughtful
- comments are very welcome.
-
- It may be useful to add NSDEVTYPE_NARRATOR for the future to bring
- back a narrator eventually. A future narrator may be a completely
- different beast for input and output than the one that used to be
- part of the OS, which means that the meaning of a device type like
- this needs a lot more thought in general. So if someone has an
- intention to create a narrator like NSD device, please get in
- contact with us.
-
- It has been suggested that the query result should contain the size
- of the expected I/O request for general use. This would make it
- possible to extend the functionality of an existing device type by
- optionally extending its IORequest in agreed upon and standardized
- ways without having to introduce a new type specifier. This is
- tricky, though, as a single device type may have multiple valid
- sizes depending on the command used, like the original
- trackdisk.device. Maybe the maximum supported size should be set
- here to give an indication of the maximum available request feature
- size. Maybe a table of possible sizes, indicating different
- features should be returned.
-
- SANA devices pass in necessary configuration data on OpenDevice().
- This is not really such a great idea within the NSD context.
- A general NSD command to pass in configuration data for any device
- type may be a very good and very important thing to keep
- OpenDevice() close to its original meaning as hinted at in the RKM.
-
- There should be comments on how I/O requests are correctly
- duplicated. Official documentation on this has always been sketchy
- at best, and the fact that for any device type basically only the
- io_Device and io_Unit IORequest need to be duplicated, except for
- device specific data in an extended request structure, has not been
- really defined well.
-
- This document needs to be presented in a more readable form and
- possibly in hypertext form. It should also continue to be available
- in plain text, though. texinfo may be a good and portable choice with
- minimum environment needs, as long as illustrations are not needed.
-
- *** EOT ***
-