Say Karl are you the former N&V columnist? I used to do a little for them
although I've been associated more with DDJ over the years (and still am
http://www.ddj.com/embedded).
Enjoyed your first document on this and looking forward to seeing the 2nd one.
Al Williams
On Tuesday, O
Thanks -- although I own a sourceforge project and use SVN, I'm not sure about
the ettiquite or feasability of accesssing SVN directly. I doubt it will
change again, anyway.
On Sunday, September 26, 2010 06:29:41 am Matthias Trute wrote:
> hi Al
>
> Thank you for the update
>
> > http://dl.dr
> And it works for all cases where the hardware does not need to be reset
> to some "interrupt-handled" state. e.g. some interrupts need to be
> cleared somehow (mostly by reading one or more bytes from pre-defined
> IO registers). If that is _not_ done within the ISR, the interrupt will
> re-fire
http://dl.dropbox.com/u/360343/am4up.c
A small change so that if the last character sent is not a end of line, the
uploader sends an end of line.
See my last e-mail for how to install.
--
Start uncovering the many advan
So I've been working with input capture interrupts today. I see that the UART
interrupts don't use the "Forth" system -- they just reprogram the vector and
use assembly.
Howeer, if you use int! to set a "Forth" interrupt vector, the default isr
sets the "T" flag when an interrupt trips. It also
Observing the behavior of Marker -- it removes words from the dictionary but
does not free up flash. Is that correct:
dp .
unused .
marker -testing
: square dup * ;
dp .
unused .
-testing
dp .
unused .
Looking at the source, I can see why. What would be the ramifications of
setting dp back as
PGA.
http://www.drdobbs.com/architecture-and-design/222000477
The CPU:
http://www.drdobbs.com/embedded-systems/221800122
and the Assembler:
http://www.drdobbs.com/embedded-
systems/222600279?queryText=Assembler+universal
On Saturday, September 18, 2010 02:37:48 am Marcin Cieslak wrote:
> >> Al Willia
Hand compile of marker from the ANS library. Note that this requires the head
version of 4.1 as discussed earlier.
http://dl.dropbox.com/u/360343/marker.asm
--
Start uncovering the many advantages of virtual appliances
a
Thanks to some help from people on the list, I have what seems to be a pretty
interesting "rescue" mode that can recover from corrupt EEPROM as long as the
basic flash portion and the bootloader flash are intact.
My development boards all have a MAX232 or a USB dongle attached so I assume
that
I don't know how to turn word wrap on in the minirc.amforth file which is why
you need the -w flag (or ^AW when running). Anyone know how to turn that on in
the config file?
On Friday, September 17, 2010 14:09:46 pm Erich Waelde wrote:
> Hi Al,
>
> On 09/17/2010 08:11 PM, Al
Ah the Python scripts are way more portable though. If you wish to include the
uploader in the distribution tools, feel free.
On Friday, September 17, 2010 13:43:43 pm Matthias Trute wrote:
> Hi Al,
>
> > I remembered that I wrote a simple upload program for the RCA 1802 a few
> > years back th
serial I/O.
Very handy to be able to just be working at the terminal and upload a word.
http://dl.dropbox.com/u/360343/am4up.c
Here's the instructions from the comments inside the file:
// Filter to upload files to amforth from minicom
// Al Williams http://www.hotsolder.com
// Originally fo
Yes, grabbing the head and building for ATMEGA32 marker now works!
Great!
On Thursday, September 16, 2010 16:46:44 pm Marcin Cieslak wrote:
> Al Williams wrote:
> > Not sure why, but I tried running the 8MHz internal RC again and now its
> > fine. Granted, before I was on the
Not sure why, but I tried running the 8MHz internal RC again and now its fine.
Granted, before I was on the 4.1 and now I'm on 3.8 -- doubt that's the
difference though. Probably operator error!
--
Start uncovering the m
>
> Ok, but it is already mentioned ;=)
>
Whoops I see that.
> Your complaints are welcome, but what could I do? Others complain that
> the scripts do not work at all due to . I use the scripts on
> my systems and they work good enough. Maybe I intuitivly circumvent all
> the bugs and deficits
> here , heap , edp , edp 8 do i e@ , 2 +loop ;
>
>: popee ( adr n -- )
>
> 0 do dup i + i@ i 2* 2 + e! loop drop ;
>
>: marker ( -- )
>
> edp >r here >r
> pushee create r> , r> ,
> does> >r r@ i@ r> 1+
ing with a hybrid 3.8 -- I did take some of the
device and driver stuff out of 4.1 and got it working with 3.8.
On Wednesday, September 15, 2010 16:59:25 pm Kalus Michael wrote:
> Hi.
>
>
> Am 15.09.2010 um 21:24 schrieb Al Williams:
> ..
>
> > Any ideas on getting marke
Right, I understand the i@ word constitutes a bootloader of sorts. But I was
trying to get a way a student with no strange equipment could go back to a
default state. I guess another way would be to drop a marker at the end of the
default dictionary and have a config option that basically says "
let you reflash a pristine system. Sort of a rescue mode.
Maybe something I'll try when I ever get enough free time.
Thanks again for all the replies.
Al W.
On Wednesday, September 15, 2010 17:15:33 pm Marcin Cieslak wrote:
> Al Williams wrote:
> > I saw amforth and popped it o
Excellent! Reverting to 3.8 did the trick. Thanks for the quick response.
>
> > The other issue I had was trying to use the 16's internal RC clock. It
> > would work until you wrote to flash (colon definition) and then it would
> > also die with no recourse but to reflash. With a 10MHz resonator
I saw amforth and popped it on an ATMega 8. Works but very little code space.
So I dug up an ATmega 16 (you can mark it as working on the matrix -- it
does).
However, I want to be able to use Marker. I have uploaded the definiton several
different ways including the python shell (which appears
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