RE: xAP - The Proposed Architecture Explained...

[Stuart Poulton <swp@xxxxxxx>]

Hi robert,

The main focus is currently to get the protocol working, and look at
basic hardware implementations.

"we've" already got wokring software and hardware, pretty good
going for
less than 4 day work.

S


On Thu, 2002-08-15 at 11:05, Robert Chasmer wrote:
> Paul Gordon [mailto:paul_gordon@xxxxxxx] drew:-
> > Whereas Multi-drop =
> > 
> > -----+-------+--------+------
> >     
      
        
> >     
      
        
> >     
_      
_        _
> >     _    
_      _
> > 
> > And would it also be true to say that electrically, these are
> > effectively the same? (assuming the devices are passive)
> 
> Ok, love the ascii art, but I'm starting to loose focus on the
current
> hardware plan.  Lots of things have been discused, RS232, RS423,
IP, On Wire
> etc, but I'm not sure where everything COULD fit in.  Is each
display going
> to join the IP network with its own address? Are we going to have a
single
> Controler that forms the link between all the devices and a single
IP
> address? Or a single PC that does all the grant work with as any
RS232
> points as required?
> 
> The one idea I don't like is that we will be broadcasting messages to
the
> whole network eg x.x.x.255, regularly for the displays to
operate.  I
> appreciate that this would easily allow several machines/devices
with
> different IP addresses to recieve and process display messages but is
this
> really neccessary.  I know that the size of messages should be
low etc. but
> thats not really the point.
> 
> In a mad attempt to try and guess the current state of play I'll try
my own
> bit of ascii art (DISCALIMER THIS IS PROBABLY ALL WRONG!)
>     
> ========++===============================++==== IP Network (Cat 5)
>        
                              
>  +------++----------------+  
+----------++-------------+
>   Display Controller         PC 01
(Mail, News, Temp,
>   Recieves Disp Messages     Weather) Sends Messages 
.. Other PCs
>   at 192.168.10.20:1739      to
192.168.10.20:1739   
>   or 192.168.10.255:1739     or BCast 192.168.10.255
>  +--------------+---------+  
+-------------------------+
>                
>                
> ========+=======+=======+===============+====== RS423 (Could be Cat
5)
>        
              
              
>      [423/232]     
[423/232]      [423/232]
>        
              
              
>    +----+----+    
+----+----+     +----+----+
>      RS232        
RS232         RS232  
>     Disp 01       Disp 02
      Disp 03 
>    +---------+    
+---------+     +---------+
> 
> I Look foward to the website that Mark mentioned, and some working
protypes
> on display so to speak.
>

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