This could have interesting encoding. Drive it as  FSM. It can be coded as
one byte per encoded character(with shorter decoding than the last Morse code
generator). MSBit as a dit/dah encoding leaving 7 bits for addressing next
character with a few left over for "interchar" and  other utility functions.

dit/dah   |     Next state
   7               6 - - 0

#define dit 0
#define dah 0x80

E:   dit+&interchar
N:   dah+&E
G:   dah+&N
P:   dit+&G
T:   dah+&interchar
A:   dah+&T


Organize as an upper case ascii representation this could be a very tight morse serial driver.


w..
--
Walter Banks
Byte Craft Limited
1 519 888 6911
http://www.bytecraft.com
walter@bytecraft.com





Barry Gershenfeld wrote:

> As your morse code programs are getting smaller and smaller, they are in
> danger of disappearing!  This code trades efficiency for novelty.  I saw
> this idea at a ham club talk (in the '70's) and have been doing it this way
> ever since.  Since you guys use assembler more than anything else, I'll
> post it that way.  I do the same thing in other languages.
>
> ; Morse code, tree structured.
> ; Example fragment assumes the basic elements have been previously defined:
>
> E:
>      call    dit
>      goto    interchar
>
> N:
>      call    dah
>      goto    E
>
> G:
>      call    dah
>      goto    N
>
> P:
>      call    dit
>      goto    G
>
> T:
>      call    dah
>      goto    interchar
>
> A:
>      call    dit
>      goto    T
>
> #pragma etc
> ; the 'etc' directive writes the rest of the program for you!
>
> ; Barry
>
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