Amforth on Arduino UNO I'm having trouble with flashing amforth on my Arduino UNO.
I'm using an Arduino as ISP to write amforth.

Here's what I do:


Upload the code on the Arduino programmer and set Baudrate to 19200
Wire the Arduinos this way -> Wiring
Run avrdude -P /dev/ttyUSB* -c avrisp -b 19200 -p m328p -e -U flash:w:uno.hex:i -U eeprom:w:uno.eep.hex:i -U efuse:w:0x05:m -U hfuse:w:0xD9:m -U lfuse:w:0xFF:m


Sometimes it fails to set efuse,  but if I give the command just for it, even if it says "efuse changed, it was 5, not is 0xfd, do you want to change it back?" and I say no, I get the message with the correct fuses.

I log onto the amforth Arduino with the python shell, but my stack is constantly ??? -13 and different numbers. I found out -13 is error code for not found, but... not found what?

What does it mean? What am I missing?

I have to say that I'm new at this things, I recently studied Forth and discovered that I can use it on my Arduino, and I wanted to try.

By the way, the Arduino is not original.
 The chip is ATmega 328p

EDIT:
I downloaded amforth from here
Initially I followed [first guide] (different wiring but I've read around it's the same) and then "clarified my doubts" with another one from sparkfun.
(no link used because maximum for me is 2 links per post at the moment, I'll write it in the comments)


I tried with versions 6.1 and 6.0, then I decided to try with 5.9 (the one from the first guide) and now I'm running that (at least it allows me to pop elements from the stack).
I programmed by Uno using your first guide and it seems to work OK.

amforth 6.1 ATmega
8P Forthduino


For example, using the serial monitor, I entered:

6 7 * .


It printed:

42  ok
&gt; 


Then  entered the ASCII table example:

\ print a ascii table
: .ascii
base @
$7f $20 do
    i emit
    decimal  ." , dec: " i .
    hex      ." , hex: " i .
    8 base ! ." , oct: " i .
    2 base ! ." , bin: " i .
    cr
loop
base !
;


Then when I invoked it with ".ascii" it printed the table:

&gt; .ascii
 , dec: 32 , hex: 20 , oct: 40 , bin: 100000 
!, dec: 33 , hex: 21 , oct: 41 , bin: 100001 
", dec: 34 , hex: 22 , oct: 42 , bin: 100010 
#, dec: 35 , hex: 23 , oct: 43 , bin: 100011 
$, dec: 36 , hex: 24 , oct: 44 , bin: 100100 
%, dec: 37 , hex: 25 , oct: 45 , bin: 100101 
&amp;, dec: 38 , hex: 26 , oct: 46 , bin: 100110 
', dec: 39 , hex: 27 , oct: 47 , bin: 100111 
(, dec: 40 , hex: 28 , oct: 50 , bin: 101000 
), dec: 41 , hex: 29 , oct: 51 , bin: 101001 
*, dec: 42 , hex: 2A , oct: 52 , bin: 101010 
+, dec: 43 , hex: 2B , oct: 53 , bin: 101011 
,, dec: 44 , hex: 2C , oct: 54 , bin: 101100 
-, dec: 45 , hex: 2D , oct: 55 , bin: 101101 
., dec: 46 , hex: 2E , oct: 56 , bin: 101110 
/, dec: 47 , hex: 2F , oct: 57 , bin: 101111 
0, dec: 48 , hex: 30 , oct: 60 , bin: 110000 
1, dec: 49 , hex: 31 , oct: 61 , bin: 110001 
2, dec: 50 , hex: 32 , oct: 62 , bin: 110010 
3, dec: 51 , hex: 33 , oct: 63 , bin: 110011 
4, dec: 52 , hex: 34 , oct: 64 , bin: 110100 
5, dec: 53 , hex: 35 , oct: 65 , bin: 110101 
6, dec: 54 , hex: 36 , oct: 66 , bin: 110110 
7, dec: 55 , hex: 37 , oct: 67 , bin: 110111 
8, dec: 56 , hex: 38 , oct: 70 , bin: 111000 
9, dec: 57 , hex: 39 , oct: 71 , bin: 111001 
:, dec: 58 , hex: 3A , oct: 72 , bin: 111010 
;, dec: 59 , hex: 3B , oct: 73 , bin: 111011 
&lt;, dec: 60 , hex: 3C , oct: 74 , bin: 111100 
=, dec: 61 , hex: 3D , oct: 75 , bin: 111101 
&gt;, dec: 62 , hex: 3E , oct: 76 , bin: 111110 
?, dec: 63 , hex: 3F , oct: 77 , bin: 111111 
@, dec: 64 , hex: 40 , oct: 100 , bin: 1000000 
A, dec: 65 , hex: 41 , oct: 101 , bin: 1000001 
B, dec: 66 , hex: 42 , oct: 102 , bin: 1000010 
C, dec: 67 , hex: 43 , oct: 103 , bin: 1000011 
D, dec: 68 , hex: 44 , oct: 104 , bin: 1000100 
E, dec: 69 , hex: 45 , oct: 105 , bin: 1000101 
F, dec: 70 , hex: 46 , oct: 106 , bin: 1000110 
G, dec: 71 , hex: 47 , oct: 107 , bin: 1000111 
H, dec: 72 , hex: 48 , oct: 110 , bin: 1001000 
I, dec: 73 , hex: 49 , oct: 111 , bin: 1001001 
J, dec: 74 , hex: 4A , oct: 112 , bin: 1001010 
K, dec: 75 , hex: 4B , oct: 113 , bin: 1001011 
L, dec: 76 , hex: 4C , oct: 114 , bin: 1001100 
M, dec: 77 , hex: 4D , oct: 115 , bin: 1001101 
N, dec: 78 , hex: 4E , oct: 116 , bin: 1001110 
O, dec: 79 , hex: 4F , oct: 117 , bin: 1001111 
P, dec: 80 , hex: 50 , oct: 120 , bin: 1010000 
Q, dec: 81 , hex: 51 , oct: 121 , bin: 1010001 
R, dec: 82 , hex: 52 , oct: 122 , bin: 1010010 
S, dec: 83 , hex: 53 , oct: 123 , bin: 1010011 
T, dec: 84 , hex: 54 , oct: 124 , bin: 1010100 
U, dec: 85 , hex: 55 , oct: 125 , bin: 1010101 
V, dec: 86 , hex: 56 , oct: 126 , bin: 1010110 
W, dec: 87 , hex: 57 , oct: 127 , bin: 1010111 
X, dec: 88 , hex: 58 , oct: 130 , bin: 1011000 
Y, dec: 89 , hex: 59 , oct: 131 , bin: 1011001 
Z, dec: 90 , hex: 5A , oct: 132 , bin: 1011010 
[, dec: 91 , hex: 5B , oct: 133 , bin: 1011011 
\, dec: 92 , hex: 5C , oct: 134 , bin: 1011100 
], dec: 93 , hex: 5D , oct: 135 , bin: 1011101 
^, dec: 94 , hex: 5E , oct: 136 , bin: 1011110 
_, dec: 95 , hex: 5F , oct: 137 , bin: 1011111 
`, dec: 96 , hex: 60 , oct: 140 , bin: 1100000 
a, dec: 97 , hex: 61 , oct: 141 , bin: 1100001 
b, dec: 98 , hex: 62 , oct: 142 , bin: 1100010 
c, dec: 99 , hex: 63 , oct: 143 , bin: 1100011 
d, dec: 100 , hex: 64 , oct: 144 , bin: 1100100 
e, dec: 101 , hex: 65 , oct: 145 , bin: 1100101 
f, dec: 102 , hex: 66 , oct: 146 , bin: 1100110 
g, dec: 103 , hex: 67 , oct: 147 , bin: 1100111 
h, dec: 104 , hex: 68 , oct: 150 , bin: 1101000 
i, dec: 105 , hex: 69 , oct: 151 , bin: 1101001 
j, dec: 106 , hex: 6A , oct: 152 , bin: 1101010 
k, dec: 107 , hex: 6B , oct: 153 , bin: 1101011 
l, dec: 108 , hex: 6C , oct: 154 , bin: 1101100 
m, dec: 109 , hex: 6D , oct: 155 , bin: 1101101 
n, dec: 110 , hex: 6E , oct: 156 , bin: 1101110 
o, dec: 111 , hex: 6F , oct: 157 , bin: 1101111 
p, dec: 112 , hex: 70 , oct: 160 , bin: 1110000 
q, dec: 113 , hex: 71 , oct: 161 , bin: 1110001 
r, dec: 114 , hex: 72 , oct: 162 , bin: 1110010 
s, dec: 115 , hex: 73 , oct: 163 , bin: 1110011 
t, dec: 116 , hex: 74 , oct: 164 , bin: 1110100 
u, dec: 117 , hex: 75 , oct: 165 , bin: 1110101 
v, dec: 118 , hex: 76 , oct: 166 , bin: 1110110 
w, dec: 119 , hex: 77 , oct: 167 , bin: 1110111 
x, dec: 120 , hex: 78 , oct: 170 , bin: 1111000 
y, dec: 121 , hex: 79 , oct: 171 , bin: 1111001 
z, dec: 122 , hex: 7A , oct: 172 , bin: 1111010 
{, dec: 123 , hex: 7B , oct: 173 , bin: 1111011 
|, dec: 124 , hex: 7C , oct: 174 , bin: 1111100 
}, dec: 125 , hex: 7D , oct: 175 , bin: 1111101 
~, dec: 126 , hex: 7E , oct: 176 , bin: 1111110 
 ok
&gt; 




I suspect your issue is you are not using it the way it is supposed to be used. Can you show the exact commands you type which cause the error?



(Edited to add)

After fairly extensive investigation of the source, I think that .s is not necessarily implemented for the Uno .hex file.

I found one suggested implementation here:

: .s  ( -- )\ stack picture listing order
depth
begin dup while dup pick . 1- repeat
drop
;


Running that it seems to work OK:

&gt; 1 2 3 4 .s
1 2 3 4  ok


The .s word is implemented in the file dot-s.asm where you can see exactly how they did it (it's not the same as the Forth version above).