[Coco] Workkng on fig Forth for 6809

[Johann Klasek]

On Sun, Feb 10, 2019 at 04:05:47AM +0000, Derek John Evans wrote:
> 
> Looks like a lot of work. Any reason why you're starting from a 6800 version?
> Colorforth was figforth. The archive contains an updated disk version plus source., but they took out the cas support.

Just wondering too ... however, it might be interesting how things are
done on a 6800 compared to a 6809.

I'm constantly using a FIG Forth variant, eForth embedded in a 6809 SBC
simulator environment. 
https://github.com/6809/sbc09/blob/master/examples/ef09.asm
It is direct threaded, the code field is executed, IP is in U, parameter
stack uses S and the return stack Y.
NEXT is inline, just a single command: PULU PC

Nice stuff to play around with ... or just to simply track the elegance
of Forth on the 6809. ;)

Johann K.