AVR-Chat

--- In AVR-Chat@yahoogroups.com, "David VanHorn" <microbrix@...> 
wrote:
>
> > As long as you remember to program it before you solder it on and
> > create a BRICK.
> > As long as you don't need to change the loader code.
> > As long as you don't need to debug the application with JTAG.
> > All I'm saying is think of all the posibilities that can occur
> > before you paint yourself into a corner.
> 
> 
> There are millions and millions of credit card terminals out there,
> which load their applications into SRAM, using a loader in ROM.
> From day 1, somewhere back in the mists of 1983, that loader has 
not
> changed.  In this case it's not physically possible to change the
> loader other than removing the ROM.  The user presses one button,
> optionally enters a phone number and merchant ID, and it dials out 
and
> gets new application code.  The loader has to manage a modem, phone
> line interface, scanned keyboard, and VFD display.
> 
> The loader needs to be exactly as simple as it can be, and not any 
simpler.
> 
> I never understood why PC motherboards with their vastly larger
> resources, couldn't get such a simple thing right.
>
Of course loaders work...... That is not the point....
All I'm saying is that if the PCB has NO way of programming the 
device once soldered... and you mount un-programmed devices you have 
a BRICK. 

Dyan...