.. |R| unicode:: U+00AE
       :ltrim:

Prebuilt hex files
==================

Building AmForth from its source allows you to tailor AmForth to the
project or task you have in mind. This has a learning curve, but is
the best way. Nevertheless, there are times when prebuilt hex files
are useful. Some prebuilt hex files will be included in the
distribution from release 7.0 onwards. They can be found in the
directories below **appl/prebuilt**

.. warning::
   Flashing the hex files will overwrite any existing bootloader
   on your development board. 

The developement boards need to be flashed with the prebuilt hex
files, and potentially fuses modified. A hardware programmer is required.  

   
Arduino |R| UNO
-----------------

In addition, any ATmega328P based board with a 16MHz clock is also
likely to work. Connecting via serial 38400-8N1 (usually via the
onboard USB port's USB-TTL serial IC) should result in an operator
prompt.

For the compact build flash **uno.hex** and **uno.eep.hex**. You may
need to modify the fuses. These values L:0xFF H:0xD9 E:0x05 have proved
successful. See the reference card for words included.

For the large build flash **uno.large.hex** and
**uno.large.eep.hex**. You may need to modify the fuses. These values
L:0xFF H:0xD9 E:0x05 have proved successful. This has all the words of
the compact build together with many words from **/lib** including
**anew** **marker** and words for **I2C**. See the relevant sections
of the Cookbook for details.


Arduino |R| Mega 2560
---------------------

In addition, any ATmega2560 based board with a 16MHz clock is also
likely to work. Connecting via serial 38400-8N1 (usually via the
onboard USB port's USB-TTL serial IC) should result in an operator
prompt.

For the compact build flash **mega.hex** and **mega.eep.hex**. You may
need to modify the fuses. The values L:0xFF H:0xD9 E:0xF7 have proved
successful. See the reference card for words included.

For the large build flash **mega.large.hex** and
**mega.large.eep.hex**. You may need to modify the fuses. The values
L:0xFF H:0xD9 E:0xF7 have proved successful. This has all the words of
the compact build together with many words from **/lib** including
**anew** **marker** and words for **I2C**. See the relevant sections
of the Cookbook for details.