[57north-discuss] [57north-announce] Open Evening

[tj]

On Tue, Oct 11, 2016 at 12:36:00PM +0100, Robert McWilliam wrote:
> > On Tue, Oct 11, 2016 at 09:38:58AM +0100, Hibby wrote:
> > > Gooooooooood Morning hackers, crackers, makers and bakers!
> > > 
> > > It's Tuesday, which means it's time for 57North to open for all.
> > > 
> > > What'll you be getting up to?
> 
> I think I'm going to have a play with adding RFID cards to doorbot. And
> discuss if the sofa could do with being lowered a bit now.  
> 
> On Tue, 11 Oct 2016, at 09:51, tj wrote:
> > > [1] https://www.freebsd.org/releases/11.0R/relnotes.html
> > 
> > Yes, please try this release. It is just great and if you really hard
> > you can find the code I wrote.  If anyone wants help I can give helping
> > pointers[2], 0xa5a5a5a5a5a5a5a5 and the like.
> 
> I'm intrigued if that could ever be a real pointer... it's definitely
> got too many bits to map through any virtual memory system I've come
> across, but I'm not sure about things that aren't memory but are
> pretending to be: do they use "invalid" virtual addresses anywhere? In a
> way that could get that far through the 64bit address space? 
> 
> As a real address that would be a couple quintillion yottabytes in,
> which would need an impressive machine - I make it about another century
> of Moore's law to get there. 
> 
> I suppose you might not be indexing bytes. Indexing atoms on earth that
> would only be about a millionth of the way in, so I'll call it plausible
> as a pointer to an atom in a planet. 
> 

You might need more time in gdb. I see  0xa5a5a5a5a5a5a5a5 quite a lot
for uninitialised pointer values, normally I have missed something quite
important and this pointer is a good friend.


- [tj]