Re: [Amforth-devel] Words redefiniton and references

[Matthias T. <mt...@we...>]

Hi Pito,

> So from all the previous posts - in order to redefine sinus I have to
> upload a new word:

just start as follows

\ Rdefer uses the RAM, so it needs to be initialized
\ every time the controller starts

Rdefer sinus

\ define a word that uses sinus. note that there is still
\ no code for calculating sinus !
: height ... sinus ... ;

\ now comes the first version of the sinus code
: sinus1 ...... ;
' sinus1 is sinus

calling height will indirectly call sinus1 as sinus

\ define another sinus, probably better
: sinus2 ..... ;
\ and make it active
' sinus2 is sinus

calling height _now_ will execute sinus2, sinus1 is no longer
used. heigth itself is not changed at all.


wrt to the initialization: you will have to extend turnkey
to include the proper ' sinus_x is sinus otherwise
heigth uses some uninitializes pointer that will cause a crash.

if you use Edefer instead of Rdefer the settings will be stored
in the EEPROM. all other code above can remain (esp. the is )

HTH
Matthias