AVR-Chat

> 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.