Re: [Amforth] newby question mega 2560

[Matthias T. <mt...@we...>]

Hi Andrew,

> The list of arduino boards 'supported'

a general remark: supported means: the code
can be assembled and the controller
produces a command prompt (at least sometimes and
for at least one release). If anything goes
wrong, sorry.

> include the Mega with the
> ATMega 1280 part.  My question is waht are the differences between
> the 1280 and 2560  ?

The major difference is that the 256x devices use a 3byte
addressing schema for the flash. In contrast amforth uses
a 2byte address (remember: 16bit forth).

Some time ago I adapted amforth to run on such a big
iron, but could not test it for a while. It should work
however.., You will have no advantage over a 128x
device: half of the flash memory cannot be used
currently and there is a small speed penalty due to
higher overhead in the low level routines.

In any case I'm very interested if you could test it
and report any success/failure.

Matthias