Re: [Amforth] AVRDUDE (AVR109 protocol) matching Bootloader

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

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Hi Enoch,

> May I suggest making AmForth a BOOFA bootloader friendly by adding 
> the following to core/amforth.asm:
> 
> .org NRWW_START_ADDR + #ifdef BOOFA			;The BOOFA bootloader + .org 
> pc+512			; is 512 words max! + #endif .include 
> "amforth-interpreter.asm"

Looks like a hack to me.

First that comes to me is that the bootloader cannot
change the content of the NRWW area. I think this will be
troublesome if you want to change code there as well.
For that it would be better to use the amforth-low instead
of the amforth.asm. This requires some glue code for the
!i word. And here lies what I call the "hack": both
boofa and amforth have code to write to the flash.
But they do not cooperate here and do not share code.
I think that this can be made in a better way, e.g.
some forth code that implements the boot loader protocol.

In a few earlier releases I had a customizable start address
of the NRWW code part, seems that dropping this was
not a smart idea ;)

Matthias

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