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From: adams@trim.intel.com (Robert Adams)
Newsgroups: comp.unix.sysv386
Subject: Re: version3 -> version 4 drivers
Message-ID: <1656@gandalf.littlei.UUCP>
Date: 25 Jan 91 21:30:46 GMT
References: <34@talgras.UUCP> <32@talgras.UUCP> <1991Jan23.142540.8883@nstar.rn.com>
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Reply-To: adams@trim.intel.com (Robert Adams)
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 article <1991Jan23.142540.8883@nstar.rn.com> larry@nstar.rn.com (Larry
Snyder) writes:
david@talgras.UUCP (David Hoopes) writes:
>Will a System V3.2 driver link and run ok on System V4?
>If not what kind of changes will be needed?

I believe that SVR4.0 was designed to be binary compatable with SVR3.2
drivers but not source compatable (I find it scary to load a SVR3.2
tape driver binary into a SVR4.0 system and have it work).  The
source interface, though, was designed with change in mind.

Although close to the SVR3.2 interface, SVR4.0 has the DDI/DKI standard
device interface.  In the "Device Driver Interface/Driver Kernel Inteface
(DDI/DKI) Reference Manual", there is an "Appendix B: Migration from 
Release 3.2 to Release 4.0" section that lists the old and the
functionally equivilent new interface.

        -- Robert Adams         adams@littlei.intel.com
                                ...!uunet!littlei!adams
Disclaimer: Any opinions expressed here are my own and are not
     representative of Intel Corporation.