Interesting Backplane

[Roger Florkowski]

Ok netlanders, here is a picture describing something unique about
my 3b1.  There I was installing a new motherboard,  and I noticed
something about the back metal plane that I hadn't seen on any
other 3b1 I had taken apart.  The back plane was extended across
on the right hand side (underneath the floppy drive), and it
contained a large cut out.  Normally the back plane drops down
as I show on the left side.  Now, this cut out cannot be seen
when the cover is on because the fan grate covers it.  Has anyone
else seen anything like this?  

The machine has a 67 meg drive and a high serial number. 
Under the cover there is writing dated April 1986,  so that
puts it towards the end of the production run of these machines.

A funny coincidence is that I was planning on adding a second hard
drive this summer.  All that I have to do for cabling is cut away 
the fan grate and drop in a socket!


                       phone       parallel     serial        UNKNOWN
                screw  jacks         port        port  screw  CUTOUT!!
                 |--------------------------------------------------------
 ________________| o [_][_][_]  [____________] [_______] o  [__________] |
|                                                                        |
--------------------------------------------------------------------------
|    Expansion #1       |      Expansion #2       |    Expansion #3      |
|                       |                         |                      |
--------------------------------------------------------------------------


-- 
Roger Florkowski	       		{uunet!uvm-gen, attmail}!banzai!roger
The People's Computer Company			  `Revolutionary Programming'