Hello,
> On 2025-12-31 02:32, Nigel Rowe wrote:
>> having got amforth running on an arduino nano, I wanted to
>> use *marker* ...
>> OK, so the problem is in does>, ...
I have used marker and definitions with does> extensively, and
they do work as advertised, at least up to version 6.9, on avr
controllers (mostly atmega644p).
From what you describe, I would rather suspect, that there is
something else wrong. Maybe your build has a subtle shortcoming,
or flashing/uploading is missing something, or eeprom content is
not correct, i.e. not correctly coresponding to ram. Or your
controller is configured strangely (fuse bits?). Or your
controller could be subtly broken. Also consider using another
board, like an uno, if possible.
I have wasted countless hours chasing ghosts like these.
Good luck!
Erich
[email protected] writes:
> Hello Nigel,
>
> I can't reproduce the error from the pastebin with my build of AmForth.
>
> |S| 1|anew empty.tests
> |W| 2|
> |S| 3|: const create , does> @i ;
> |S| 4|42 const ltuae
> |S| 5|ltuae
> |S| 6|.
> |O| 6|42
> |W| 7|
>
> Above works as expected
>
> |S| 8|anew empty.tests
> |W| 9|
> |S| 10|ltuae
> |E= ?? -13 5
> |S| 11|.
>
> Above works as expected (can't find ltuae)
>
> |E=0 ?? -4 1
> |W| 12|
> |S| 13|words
> |O| 13|empty.tests empty White Cyan Brown Blue Yellow Green Red Black
> text_reverse text_blink text_underline text_bold text_normal background
> foreground page at-xy ESC[ .;n .n ESC[ mandelbrot dorow docell doescape
> init_vars count_and_test? escapes? .char zi_sq zr_sq count zimag zreal
cimag
> creal s_escape rescale maxval minval maxiter empty.fun show show.short
> show.long (show)
>
> Above works as expected - words works (output truncated)
>
> So that leaves differences between our hardware/builds.
>
> For hardware a set of known working hex files could be
> flashed to your hardware. For the build, it is more complicated,
> as AmForth will build on multiple operating systems/assemblers.
>
> How are you building AmForth?
>
> One option would be to try building from below in your current way.
>
> https://sourceforge.net/p/amforth/code/2457/tree/releases/6.9/
>
> This removes the few changes I have made (see link) since
>
> https://sourceforge.net/p/amforth/mailman/message/59254494/
>
> Best wishes,
> Tristan
>
>
> On 2025-12-31 02:32, Nigel Rowe wrote:
>> Greetings,
>> having got amforth running on an arduino nano, I wanted to use *marker*
>> (I'm using italics for amforth words). Actually I want to use *anew*,
but
>> that requires *marker*.
>> So I #included marker.frt, then did *marker* -*empty*-. got the prompt
>> back, but when I then typed *words*, I got " ?? -13 5".
>> I tried a few other words, same result, numbers however, were accepted
>> without complaint.
>> I then did the "make install", #include mymarker.frt (a sucessivly
>> truncated version of marker), got the same result, rinse and repeat,
until
>> removing *does>* stopped crashing amforth.
>> OK, so the problem is in does>, so rather than playing with marker, I
>> created the most basic word that uses *does>*.
>> *: const create , does> @i ;* (straight out of the cookbook). Same
>> problem, it compiles ok, but when I do
>> *42 const ltuae *now I'm back to the same " ?? -13 x" problem (x
obviously
>> varies depending on the word I type).
>> The symptoms make me think executing does> fouls up *dp*, or *newest*,
or
>> maybe something used by *get-current*. But what do I know?
>> So I look at the source (does.asm), paper traced through XT_DODOES,
makes
>> sense, looks like it does what the comments indicate it should. So I
>> looked at DO_DODOES, and I have no idea, last time I did any assembler
was
>> in the 1980s on a Z80. So I'm lost.
>> Copy of last amshell session is here https://pastebin.com/L60vNSrY
>> Thanks for reading, hopefully someone can help.
>> Nigel
>
>
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--
May the Forth be with you ...
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