amforth-devel

[Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

[Christian H. <hin...@ou...>]

Hi to your support team.

I have AmForth working properly on an Arduino UNO.

I am now trying to use it with an Arduino MEGA using the Atmega2560 but I get no console response after programming the files  atmega256.hex  and atmega256.eep.hex from folder \amforth-6.9\appl\atmega2561 of downloaded file amforth-6.9.zip.

I still consider myself as a beginner hobbyist and  I do not yet have the ability to assemble my one code from source.

  *   Are these Hex file effectively compatible with the Arduino MEGA using the ATmega2560 ?
  *   What are the fuses that I should use with the Arduino MEGA.using the ATmega2560 ?

I am currently using the followings fuses:

Reading fuses...
>>>: avrdude -u -c usbasp -p m2560 -P usb -b 115200 -B 1.0 -U hfuse:r:-:h -U lfuse:r:-:h -U efuse:r:-:h
SUCCESS: Read high fuse
SUCCESS: Read low fuse
SUCCESS: Read extended fuse

My serial port COM7 is transmitting to the Arduino MEGA  because I can see the RX LED flashing. I don not see an response on the TX LED or the console.

  *   Am I using HEX files that are not compatible with the Arduino MEGA using an ATmega2560 MCU ?
  *   If not, what can I do to make these files work with the Arduino MEGA using the ATmega2560.

I would appreciate your help to resolve this problem.

Thanks.

Christian Hinse

Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

[Tristan W. <ho...@tj...>]

Hello Christian,

Below is a link to AmForth hex files I built for my Arduino MEGA using the
(then) most recent source (r2457). The console baud rate is 38400 and
build details are in the atmega2560.asm file.

https://tjnw.co.uk/amforth-bin/

Some background info is contained in this message thread.

https://sourceforge.net/p/amforth/mailman/message/37296323/

Hope this helps and let me know if you get it up and running. 

Kind regards,

Tristan 

On 16Apr22 07:08, Christian Hinse wrote:
> Hi to your support team.
> 
> I have AmForth working properly on an Arduino UNO.
> 
> I am now trying to use it with an Arduino MEGA using the Atmega2560 but I get no console response after programming the files  atmega256.hex  and atmega256.eep.hex from folder \amforth-6.9\appl\atmega2561 of downloaded file amforth-6.9.zip.
> 
> I still consider myself as a beginner hobbyist and  I do not yet have the ability to assemble my one code from source.
> 
>   *   Are these Hex file effectively compatible with the Arduino MEGA using the ATmega2560 ?
>   *   What are the fuses that I should use with the Arduino MEGA.using the ATmega2560 ?
> 
> I am currently using the followings fuses:
> 
> Reading fuses...
> >>>: avrdude -u -c usbasp -p m2560 -P usb -b 115200 -B 1.0 -U hfuse:r:-:h -U lfuse:r:-:h -U efuse:r:-:h
> SUCCESS: Read high fuse
> SUCCESS: Read low fuse
> SUCCESS: Read extended fuse
> 
> My serial port COM7 is transmitting to the Arduino MEGA  because I can see the RX LED flashing. I don not see an response on the TX LED or the console.
> 
>   *   Am I using HEX files that are not compatible with the Arduino MEGA using an ATmega2560 MCU ?
>   *   If not, what can I do to make these files work with the Arduino MEGA using the ATmega2560.
> 
> I would appreciate your help to resolve this problem.
> 
> Thanks.
> 
> Christian Hinse
> 
> 
> 
> 
> 
> _______________________________________________
> Amforth-devel mailing list for http://amforth.sf.net/
> Amf...@li...
> https://lists.sourceforge.net/lists/listinfo/amforth-devel
> 

Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

[Christian H. <hin...@ou...>]

Hi Tristan.

Your r2457AmForth  version is working fine on my Arduino MEGA with ATmega2560, except for a few garbled character after the reset. But that is probably normal. It occurs on the UNO as well.

> amforth 7.0 ATmega2560 16000 kHz
> words
int-trap int@ int! -int +int #int irq[]# postpone (marker) end-code code forth-wordlist wordlist set-current >body s>d bounds init-ram ee>ram #tib tib source-tib refill-tib 2swap cmove dnegate dabs j * icompare nfa>cfa name>string traverse-wordlist search-wordlist (defer) defer@ defer! Udefer! Udefer@ Rdefer! Rdefer@ Edefer! Edefer@ i-cell+ to unused noop ver ?stack rectype-null rectype-xt rec-find rec-num rectype-dnum rectype-num recognize forth-recognizer interpret depth rp0 sp0 warm cold pause quit .input .error .ready .ok find-xt parse-name /string source parse >number number char refill accept cscan cskip throw catch handler ' type spaces space cr icount itype s, digit? ud/mod ud.r ud. . d. .r d.r sign #> #s # <# hold hld tolower toupper within max min abs mod / negate u/mod /mod turnkey bl hex decimal bin allot here ehere dp key? key emit? emit pad >in tuck 2drop 2dup cell+ cells base state f_cpu environment fill s" ." pick words show-wordlist u.r u. dinvert d- d+ d2/ d2* nr> n>r -1 2 1 = 2literal @i (i!) !i @e !e 2r> 2>r up! up@ >< cmove> unloop i sp! sp@ rp! rp@ +! rshift lshift ?negate 1- 1+ xor or and 2* 2/ invert um* um/mod m* + - log2 > < u> u< 0 true d0< d0> 0> 0< 0= <> r@ >r r> nip rot drop over swap ?dup dup !u @u c@ c! ! @ (value) execute exit applturnkey nfa>lfa compare cfg-recs cfg-order get-current map-stack set-stack get-stack ?abort abort abort" [char] immediate recurse user constant variable [ ] ; :noname : does> reveal wlscope header create lp lp0 >l l> endloop ?do leave +loop loop do again until repeat while begin then else if ahead sliteral literal ['] , compile ( \ (create-in) (create) latest newest 1ms name>flags umin umax ud* m+ sleep !wdc wdr c!@spi bm-toggle bm-clear bm-set b> >b b!- b!+ nb! b! b@- b@+ nb@ b@ a> >a a!- a!+ na! a! a@- a@+ na@ a@ +usart ubrr tx?-poll tx-poll rx?-buf rx-buf isr-rx >rx-buf  ok
>

Some question:

  *   How much of 256KB flash is effectively usable with AmForth on the 2560?
  *   Will this work as well on a Chinese  ATmega2560ProMini (with FTDI USB chip for terminal input) ?
  *   If so, may I share your links with a friend who has an  ATmega2560ProMini?

Thanks a lot for your help.

Christian Hinse
________________________________
From: Tristan Williams <ho...@tj...>
Sent: 16 April 2022 06:05
To: amf...@li... <amf...@li...>
Subject: Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

Hello Christian,

Below is a link to AmForth hex files I built for my Arduino MEGA using the
(then) most recent source (r2457). The console baud rate is 38400 and
build details are in the atmega2560.asm file.

https://tjnw.co.uk/amforth-bin/

Some background info is contained in this message thread.

https://sourceforge.net/p/amforth/mailman/message/37296323/

Hope this helps and let me know if you get it up and running.

Kind regards,

Tristan

On 16Apr22 07:08, Christian Hinse wrote:
> Hi to your support team.
>
> I have AmForth working properly on an Arduino UNO.
>
> I am now trying to use it with an Arduino MEGA using the Atmega2560 but I get no console response after programming the files  atmega256.hex  and atmega256.eep.hex from folder \amforth-6.9\appl\atmega2561 of downloaded file amforth-6.9.zip.
>
> I still consider myself as a beginner hobbyist and  I do not yet have the ability to assemble my one code from source.
>
>   *   Are these Hex file effectively compatible with the Arduino MEGA using the ATmega2560 ?
>   *   What are the fuses that I should use with the Arduino MEGA.using the ATmega2560 ?
>
> I am currently using the followings fuses:
>
> Reading fuses...
> >>>: avrdude -u -c usbasp -p m2560 -P usb -b 115200 -B 1.0 -U hfuse:r:-:h -U lfuse:r:-:h -U efuse:r:-:h
> SUCCESS: Read high fuse
> SUCCESS: Read low fuse
> SUCCESS: Read extended fuse
>
> My serial port COM7 is transmitting to the Arduino MEGA  because I can see the RX LED flashing. I don not see an response on the TX LED or the console.
>
>   *   Am I using HEX files that are not compatible with the Arduino MEGA using an ATmega2560 MCU ?
>   *   If not, what can I do to make these files work with the Arduino MEGA using the ATmega2560.
>
> I would appreciate your help to resolve this problem.
>
> Thanks.
>
> Christian Hinse
>
>
>
>
>
> _______________________________________________
> Amforth-devel mailing list for http://amforth.sf.net/
> Amf...@li...
> https://lists.sourceforge.net/lists/listinfo/amforth-devel
>


_______________________________________________
Amforth-devel mailing list for http://amforth.sf.net/
Amf...@li...
https://lists.sourceforge.net/lists/listinfo/amforth-devel

Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

[Tristan W. <ho...@tj...>]

Hi Christian,

Glad it worked.

> How much of 256KB flash is effectively usable with AmForth on the 2560? ?

Good question. I don't know. The file avr8/words/store-i_big.asm may give some
clues. 

> Will this work as well on a Chinese  ATmega2560ProMini (with FTDI USB chip for terminal input) ?

Again, I don't know. However, if the board has an ATmega2560 mcu
running at 16 MHz then there is good chance. I think only by flashing
the board and testing it will you have a better idea. 

> If so, may I share your links with a friend who has an  ATmega2560ProMini?

Yes.

Kind regards,

Tristan

On 16Apr22 16:34, Christian Hinse wrote:
> Hi Tristan.
> 
> Your r2457AmForth  version is working fine on my Arduino MEGA with ATmega2560, except for a few garbled character after the reset. But that is probably normal. It occurs on the UNO as well.
> 
> > amforth 7.0 ATmega2560 16000 kHz
> > words
> int-trap int@ int! -int +int #int irq[]# postpone (marker) end-code code forth-wordlist wordlist set-current >body s>d bounds init-ram ee>ram #tib tib source-tib refill-tib 2swap cmove dnegate dabs j * icompare nfa>cfa name>string traverse-wordlist search-wordlist (defer) defer@ defer! Udefer! Udefer@ Rdefer! Rdefer@ Edefer! Edefer@ i-cell+ to unused noop ver ?stack rectype-null rectype-xt rec-find rec-num rectype-dnum rectype-num recognize forth-recognizer interpret depth rp0 sp0 warm cold pause quit .input .error .ready .ok find-xt parse-name /string source parse >number number char refill accept cscan cskip throw catch handler ' type spaces space cr icount itype s, digit? ud/mod ud.r ud. . d. .r d.r sign #> #s # <# hold hld tolower toupper within max min abs mod / negate u/mod /mod turnkey bl hex decimal bin allot here ehere dp key? key emit? emit pad >in tuck 2drop 2dup cell+ cells base state f_cpu environment fill s" ." pick words show-wordlist u.r u. dinvert d- d+ d2/ d2* nr> n>r -1 2 1 = 2literal @i (i!) !i @e !e 2r> 2>r up! up@ >< cmove> unloop i sp! sp@ rp! rp@ +! rshift lshift ?negate 1- 1+ xor or and 2* 2/ invert um* um/mod m* + - log2 > < u> u< 0 true d0< d0> 0> 0< 0= <> r@ >r r> nip rot drop over swap ?dup dup !u @u c@ c! ! @ (value) execute exit applturnkey nfa>lfa compare cfg-recs cfg-order get-current map-stack set-stack get-stack ?abort abort abort" [char] immediate recurse user constant variable [ ] ; :noname : does> reveal wlscope header create lp lp0 >l l> endloop ?do leave +loop loop do again until repeat while begin then else if ahead sliteral literal ['] , compile ( \ (create-in) (create) latest newest 1ms name>flags umin umax ud* m+ sleep !wdc wdr c!@spi bm-toggle bm-clear bm-set b> >b b!- b!+ nb! b! b@- b@+ nb@ b@ a> >a a!- a!+ na! a! a@- a@+ na@ a@ +usart ubrr tx?-poll tx-poll rx?-buf rx-buf isr-rx >rx-buf  ok
> >
> 
> Some question:
> 
>   *   How much of 256KB flash is effectively usable with AmForth on the 2560?
>   *   Will this work as well on a Chinese  ATmega2560ProMini (with FTDI USB chip for terminal input) ?
>   *   If so, may I share your links with a friend who has an  ATmega2560ProMini?
> 
> Thanks a lot for your help.
> 
> Christian Hinse
> ________________________________
> From: Tristan Williams <ho...@tj...>
> Sent: 16 April 2022 06:05
> To: amf...@li... <amf...@li...>
> Subject: Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console
> 
> Hello Christian,
> 
> Below is a link to AmForth hex files I built for my Arduino MEGA using the
> (then) most recent source (r2457). The console baud rate is 38400 and
> build details are in the atmega2560.asm file.
> 
> https://tjnw.co.uk/amforth-bin/
> 
> Some background info is contained in this message thread.
> 
> https://sourceforge.net/p/amforth/mailman/message/37296323/
> 
> Hope this helps and let me know if you get it up and running.
> 
> Kind regards,
> 
> Tristan
> 
> On 16Apr22 07:08, Christian Hinse wrote:
> > Hi to your support team.
> >
> > I have AmForth working properly on an Arduino UNO.
> >
> > I am now trying to use it with an Arduino MEGA using the Atmega2560 but I get no console response after programming the files  atmega256.hex  and atmega256.eep.hex from folder \amforth-6.9\appl\atmega2561 of downloaded file amforth-6.9.zip.
> >
> > I still consider myself as a beginner hobbyist and  I do not yet have the ability to assemble my one code from source.
> >
> >   *   Are these Hex file effectively compatible with the Arduino MEGA using the ATmega2560 ?
> >   *   What are the fuses that I should use with the Arduino MEGA.using the ATmega2560 ?
> >
> > I am currently using the followings fuses:
> >
> > Reading fuses...
> > >>>: avrdude -u -c usbasp -p m2560 -P usb -b 115200 -B 1.0 -U hfuse:r:-:h -U lfuse:r:-:h -U efuse:r:-:h
> > SUCCESS: Read high fuse
> > SUCCESS: Read low fuse
> > SUCCESS: Read extended fuse
> >
> > My serial port COM7 is transmitting to the Arduino MEGA  because I can see the RX LED flashing. I don not see an response on the TX LED or the console.
> >
> >   *   Am I using HEX files that are not compatible with the Arduino MEGA using an ATmega2560 MCU ?
> >   *   If not, what can I do to make these files work with the Arduino MEGA using the ATmega2560.
> >
> > I would appreciate your help to resolve this problem.
> >
> > Thanks.
> >
> > Christian Hinse
> >
> >
> >
> >
> >
> > _______________________________________________
> > Amforth-devel mailing list for http://amforth.sf.net/
> > Amf...@li...
> > https://lists.sourceforge.net/lists/listinfo/amforth-devel
> >
> 
> 
> _______________________________________________
> Amforth-devel mailing list for http://amforth.sf.net/
> Amf...@li...
> https://lists.sourceforge.net/lists/listinfo/amforth-devel
> 
> _______________________________________________
> Amforth-devel mailing list for http://amforth.sf.net/
> Amf...@li...
> https://lists.sourceforge.net/lists/listinfo/amforth-devel
> 

Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

[George H. <jac...@gm...>]

Hello,
I  believe only 50% of the Arduino Mega flash is available to Forth for
dictionary use.

This is simply a hardware barrier that exists. The additional 126kb
theoretically can be put to use in other ways, but I've not seem actually
solutions.
On Sun, Apr 17, 2022, 2:48 PM Tristan Williams <ho...@tj...> wrote:

> Hi Christian,
>
> Glad it worked.
>
> > How much of 256KB flash is effectively usable with AmForth on the 2560? ?
>
> Good question. I don't know. The file avr8/words/store-i_big.asm may give
> some
> clues.
>
> > Will this work as well on a Chinese  ATmega2560ProMini (with FTDI USB
> chip for terminal input) ?
>
> Again, I don't know. However, if the board has an ATmega2560 mcu
> running at 16 MHz then there is good chance. I think only by flashing
> the board and testing it will you have a better idea.
>
> > If so, may I share your links with a friend who has an
> ATmega2560ProMini?
>
> Yes.
>
> Kind regards,
>
> Tristan
>
> On 16Apr22 16:34, Christian Hinse wrote:
> > Hi Tristan.
> >
> > Your r2457AmForth  version is working fine on my Arduino MEGA with
> ATmega2560, except for a few garbled character after the reset. But that is
> probably normal. It occurs on the UNO as well.
> >
> > > amforth 7.0 ATmega2560 16000 kHz
> > > words
> > int-trap int@ int! -int +int #int irq[]# postpone (marker) end-code
> code forth-wordlist wordlist set-current >body s>d bounds init-ram ee>ram
> #tib tib source-tib refill-tib 2swap cmove dnegate dabs j * icompare
> nfa>cfa name>string traverse-wordlist search-wordlist (defer) defer@
> defer! Udefer! Udefer@ Rdefer! Rdefer@ Edefer! Edefer@ i-cell+ to unused
> noop ver ?stack rectype-null rectype-xt rec-find rec-num rectype-dnum
> rectype-num recognize forth-recognizer interpret depth rp0 sp0 warm cold
> pause quit .input .error .ready .ok find-xt parse-name /string source parse
> >number number char refill accept cscan cskip throw catch handler ' type
> spaces space cr icount itype s, digit? ud/mod ud.r ud. . d. .r d.r sign #>
> #s # <# hold hld tolower toupper within max min abs mod / negate u/mod /mod
> turnkey bl hex decimal bin allot here ehere dp key? key emit? emit pad >in
> tuck 2drop 2dup cell+ cells base state f_cpu environment fill s" ." pick
> words show-wordlist u.r u. dinvert d- d+ d2/ d2* nr> n>r -1 2 1 = 2literal
> @i (i!) !i @e !e 2r> 2>r up! up@ >< cmove> unloop i sp! sp@ rp! rp@ +!
> rshift lshift ?negate 1- 1+ xor or and 2* 2/ invert um* um/mod m* + - log2
> > < u> u< 0 true d0< d0> 0> 0< 0= <> r@ >r r> nip rot drop over swap ?dup
> dup !u @u c@ c! ! @ (value) execute exit applturnkey nfa>lfa compare
> cfg-recs cfg-order get-current map-stack set-stack get-stack ?abort abort
> abort" [char] immediate recurse user constant variable [ ] ; :noname :
> does> reveal wlscope header create lp lp0 >l l> endloop ?do leave +loop
> loop do again until repeat while begin then else if ahead sliteral literal
> ['] , compile ( \ (create-in) (create) latest newest 1ms name>flags umin
> umax ud* m+ sleep !wdc wdr c!@spi bm-toggle bm-clear bm-set b> >b b!- b!+
> nb! b! b@- b@+ nb@ b@ a> >a a!- a!+ na! a! a@- a@+ na@ a@ +usart ubrr
> tx?-poll tx-poll rx?-buf rx-buf isr-rx >rx-buf  ok
> > >
> >
> > Some question:
> >
> >   *   How much of 256KB flash is effectively usable with AmForth on the
> 2560?
> >   *   Will this work as well on a Chinese  ATmega2560ProMini (with FTDI
> USB chip for terminal input) ?
> >   *   If so, may I share your links with a friend who has an
> ATmega2560ProMini?
> >
> > Thanks a lot for your help.
> >
> > Christian Hinse
> > ________________________________
> > From: Tristan Williams <ho...@tj...>
> > Sent: 16 April 2022 06:05
> > To: amf...@li... <
> amf...@li...>
> > Subject: Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No
> reponse at console
> >
> > Hello Christian,
> >
> > Below is a link to AmForth hex files I built for my Arduino MEGA using
> the
> > (then) most recent source (r2457). The console baud rate is 38400 and
> > build details are in the atmega2560.asm file.
> >
> > https://tjnw.co.uk/amforth-bin/
> >
> > Some background info is contained in this message thread.
> >
> > https://sourceforge.net/p/amforth/mailman/message/37296323/
> >
> > Hope this helps and let me know if you get it up and running.
> >
> > Kind regards,
> >
> > Tristan
> >
> > On 16Apr22 07:08, Christian Hinse wrote:
> > > Hi to your support team.
> > >
> > > I have AmForth working properly on an Arduino UNO.
> > >
> > > I am now trying to use it with an Arduino MEGA using the Atmega2560
> but I get no console response after programming the files  atmega256.hex
> and atmega256.eep.hex from folder \amforth-6.9\appl\atmega2561 of
> downloaded file amforth-6.9.zip.
> > >
> > > I still consider myself as a beginner hobbyist and  I do not yet have
> the ability to assemble my one code from source.
> > >
> > >   *   Are these Hex file effectively compatible with the Arduino MEGA
> using the ATmega2560 ?
> > >   *   What are the fuses that I should use with the Arduino MEGA.using
> the ATmega2560 ?
> > >
> > > I am currently using the followings fuses:
> > >
> > > Reading fuses...
> > > >>>: avrdude -u -c usbasp -p m2560 -P usb -b 115200 -B 1.0 -U
> hfuse:r:-:h -U lfuse:r:-:h -U efuse:r:-:h
> > > SUCCESS: Read high fuse
> > > SUCCESS: Read low fuse
> > > SUCCESS: Read extended fuse
> > >
> > > My serial port COM7 is transmitting to the Arduino MEGA  because I can
> see the RX LED flashing. I don not see an response on the TX LED or the
> console.
> > >
> > >   *   Am I using HEX files that are not compatible with the Arduino
> MEGA using an ATmega2560 MCU ?
> > >   *   If not, what can I do to make these files work with the Arduino
> MEGA using the ATmega2560.
> > >
> > > I would appreciate your help to resolve this problem.
> > >
> > > Thanks.
> > >
> > > Christian Hinse
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Amforth-devel mailing list for http://amforth.sf.net/
> > > Amf...@li...
> > > https://lists.sourceforge.net/lists/listinfo/amforth-devel
> > >
> >
> >
> > _______________________________________________
> > Amforth-devel mailing list for http://amforth.sf.net/
> > Amf...@li...
> > https://lists.sourceforge.net/lists/listinfo/amforth-devel
> >
> > _______________________________________________
> > Amforth-devel mailing list for http://amforth.sf.net/
> > Amf...@li...
> > https://lists.sourceforge.net/lists/listinfo/amforth-devel
> >
>
>
> _______________________________________________
> Amforth-devel mailing list for http://amforth.sf.net/
> Amf...@li...
> https://lists.sourceforge.net/lists/listinfo/amforth-devel
>

Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

[Martin N. <amf...@mg...>]

On Sun, 17 Apr 2022 07:47:15 +0100
Tristan Williams <ho...@tj...> wrote:

> Hi Christian,
> 
> Glad it worked.
> 
> > How much of 256KB flash is effectively usable with AmForth on the
> > 2560? ?  
> 

64k only (which is heaps) - W and IP are 16-bits only. The upper 64k is
still available, a little bit is used for the flashing code. I use
some of this space for user messages.

> Good question. I don't know. The file avr8/words/store-i_big.asm may
> give some clues. 
> 
> > Will this work as well on a Chinese  ATmega2560ProMini (with FTDI
> > USB chip for terminal input) ?  
> 
> Again, I don't know. However, if the board has an ATmega2560 mcu
> running at 16 MHz then there is good chance. I think only by flashing
> the board and testing it will you have a better idea. 
> 

The clones work fine. Out of the box you might have to blow the fuses
first - before flashing the memory.

-- 
Regards,

Martin Nicholas.

E-mail: rep...@mg... (Address will be valid throughout 2022).

Re: [Amforth] AmForth 6.9 on Arduino MEGA using ATmega2560- No reponse at console

[George H. <jac...@gm...>]

The big advantage with the Arduino Mega is lots of 8 bit ports available
for parrallel i/o.  The Arduino Uno pretty much forces all i/o to be
serialized one way or another.

On Sun, Apr 17, 2022 at 3:33 PM Martin Nicholas via Amforth-devel <
amf...@li...> wrote:

> On Sun, 17 Apr 2022 07:47:15 +0100
> Tristan Williams <ho...@tj...> wrote:
>
> > Hi Christian,
> >
> > Glad it worked.
> >
> > > How much of 256KB flash is effectively usable with AmForth on the
> > > 2560? ?
> >
>
> 64k only (which is heaps) - W and IP are 16-bits only. The upper 64k is
> still available, a little bit is used for the flashing code. I use
> some of this space for user messages.
>
> > Good question. I don't know. The file avr8/words/store-i_big.asm may
> > give some clues.
> >
> > > Will this work as well on a Chinese  ATmega2560ProMini (with FTDI
> > > USB chip for terminal input) ?
> >
> > Again, I don't know. However, if the board has an ATmega2560 mcu
> > running at 16 MHz then there is good chance. I think only by flashing
> > the board and testing it will you have a better idea.
> >
>
> The clones work fine. Out of the box you might have to blow the fuses
> first - before flashing the memory.
>
> --
> Regards,
>
> Martin Nicholas.
>
> E-mail: rep...@mg... (Address will be valid throughout 2022).
>
>
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