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Conference bulova::decw_jan-89_to_nov-90

Title:DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:STAR::VATNE
Created:Mon Oct 30 1989
Last Modified:Mon Dec 31 1990
Last Successful Update:Fri Jun 06 1997
Number of topics:3726
Total number of notes:19516

1839.0. "DECwindows Transport Specification Document" by MARVIN::RAWLINGS (Mark Rawlings. LES and LES to do all the time..) Mon Dec 04 1989 11:51


	Hi all,

	I have written a decwindows transport using OSI Transport (our V.O.T.S.
	product). This worked for V1 DECwindows, but no longer seems to work
	for V2.0.

	Is there a document explainig how to write a transport for 
	DECwindows V2.0, or can someone tell me what changed between V1 & V2?

		Thanks,
			Mark.


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1839.1Transport programming doc now availableSTAR::ORGOVANVince OrgovanMon Dec 04 1989 18:185
    The transport programming interface, which was a private interface
    in DW V1, was extensively changed in DW V2. User-written transports 
    are now supported, and the interface is documented in a new manual: 
    the VMS DECwindows Transport Manual. It is contained in the 
    DECwindows programming documentation kit for VMS V5.3.
1839.2Can we use the VMS manual for ULTRIX?SICVAX::GRAHAMif ya want home cookin, stay homeTue Dec 05 1989 23:0515
    
    >The transport programming interface, which was a private interface
    >in DW V1, was extensively changed in DW V2. User-written transports
    >are now supported, and the interface is documented in a new manual:
    >the VMS DECwindows Transport Manual. It is contained in the
    >DECwindows programming documentation kit for VMS V5.3.
    
    Is this *supported* for ULTRIX too?
    
    My group is modifying an OSI/FDDI transport for a big phone comapny
    to leverage a big RISC systems sale.  Much of the stuff already
    works...something to compare notes with will be very helpful.
    
    Kris...
    
1839.3Didn't see Ultrix mentioned onceMOSAIC::HARRISRepeal the law of gravity: Juggle!Wed Dec 06 1989 08:3610
    Having read the manual in question, I can tell you that there is
    nothing in there about Ultrix.  It is 100% VMS oriented.  The user
    written transport is a VMS Sharable image, that is loaded dynamically
    via the LIB$FIND_IMAGE_SYMBOL run-time library call.
    
    On the other hand, I haven't seen any of the code that relates to how
    Ultrix implements its TCP/IP and DECnet transports, so maybe there is
    some commonality (but I wouldn't hold my breath :-).
    
    					Bob Harris
1839.4DECWIN::FISHERBurns Fisher 381-1466, ZKO3-4/W23Wed Dec 06 1989 11:563
There is essentially nothing in common here.

Burns
1839.5CRLMAX::jgJim Gettys, Cambridge Research LabWed Dec 06 1989 15:1515
Currently, Ultrix supports 3 forms of transport.  TCP/IP, Unix domain (on 
machine IPC), and DECnet (if DECnet has been installed).  Adding another is
simple, though right now you need sources.

There is no current way for a customer to add support for a different transport
in the server/X library (though the code is simple to add; it generally
affects only two files in the entire X system).

Your first mission, is to get OSI for Unix, tho Unix folks essentially all use
TCP/IP at the present time....  That is the big problem issue, not the X 
support, which is a much easier problem.

I know of at least one FDDI thing underway for
certain future RISC workstations.
				- Jim
1839.6medical imaging....SICVAX::GRAHAMif ya want home cookin, stay homeThu Dec 07 1989 00:1919
    
    Thanx for all the answers.  Our customer wrote a transport
    that works with OSI/FDDI networks....we were asked to modify
    it - to make it work with X on multiple displays.  The phone
    company was interested in selling 'networks'(a la OSI/FDDI..)
    to the medical imaging market (read hospitals, etc).  In one
    demo, digital had to show x-ray photos displayed across several
    'networked' displays...all the doctors could interactively
    diagnose a photo, make 'live' comments, be able to 'edit'
    files associated with a particular patient (a la notes),
    save the 'session', and more.
    
    X, as we sell it today, does not have the capability required
    to support this effort; the X transport and primitives had to
    be modified to support applications requiring very high bandwidth;
    usually not obtainable with regular ethernet and state-of-the-shelf
    phone lines.

    Kris..