Re: [Amforth-devel] Difficulty with Hello World exercise

[pito <pi...@vo...>]

>From reset to the first characters ~3-4sec (old 1.7GHz notebook). P.

----- PŮVODNÍ ZPRÁVA -----
Od: "D Nyberg" <dny...@at...>
Komu: amf...@li...
Předmět: Re: [Amforth-devel] Difficulty with Hello World exercise
Datum: 22.3.2011 - 9:29:56

> On 3/21/2011 2:19:15 AM, pito (pi...@vo...)
> wrote:
> > from my previous post...
> >
> > ....By chance I found the crash is caused
> > by the debugger - when the asm source wants to
> > continue into a
> > > "debugger" (for the code outside the
> > "amforth.asm") the debuger is
> > > called, but not set properly (my understanding)
> > and crashes.
> > > Now, how it works:
> > 1. compile amforth in AVR Studio as usuall
> > 2. then close all projects
> > 3. open file - e.g. amforth42_1284p.hex (MUST BE
> > .HEX)
> > > 4. Studio offers a new project name e.g.
> > amforth42_1284p_hex.aps -
> > > do save
> > 5. select device and debug platf
> 
> Okay, so I've been working with a clean
> (unmodified) amforth build in 
> the simulator, using this trick of loading the
> .hex file into a new 
> project. Determining what's going on in a forth
> system is hard enough as 
> is, when we have labels, but okay, I'll give it a
> go.
> 
> When I tell it to run, it ends up in the weeds,
> executing illegal 
> instruction ffff. As usual, it's hard to tell how
> it got there and as 
> far as I know, there's no way to get studio4 to
> show a log or traceback. 
> So I've been running it in autostep. Good news is
> it's not executing any 
> illegal instructions, bad news is it's been
> running a long time, and I 
> don't see any characters appearing at the
> simulated terminal (using hapsim).
> 
> So my question is, does anyone know how many
> instructions or cycles it 
> takes for a correctly operating amforth to send
> its first characters out 
> the uart, so I can tell if it's taken too long,or
> just has not yet 
> gotten that far?
> 
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