Re: [Flashforth-devel] compiling for 18F2xK22

[Mikael N. <mik...@pp...>]

The rewrite you have to do is really small.

1. Change CON to CONSTANT
The 5.0 CONSTANT is identical to the 3.8 CON
The speed is the same.

2. Change 3.8 LEAVE to 5.0 ENDIT
The 5.0 LEAVE is for DO LOOP

3. Change 3.8  ' WORD IS INT to 5.0  ' WORD 0 INT!

That is all. Should not take more than 5 minutes.


The 5.0 VARIABLE is faster. It generates the same code as CONSTANT
and compiles the VARIABLE address as a inline literal.

BR Mike


On 03/21/2014 03:06 AM, craig bair wrote:
> Actually, I didn't start using CON rather than CONSTANT until reading somebody's doc/commentary that con compiled code in while constant passed the value to a call...  I'ld use it for urgent code when I needed speed more than space.  Never got time to run down the actual implamentation, though.  I haven't thoroughly dismembered a forth package since re-writing the 6502 forth core to run from the language card on an Apple ][ and extend the dictionary up from the top of the text screen memory (yeah, it's been a while...).  I'll see if there are enough changes to warrant writing something to convert the old text files for the new version, but it'll be a least a month till I've got time to turn around to sneeze...  Love it on the Pic18 XLP cores, though!  "Very tasty that, Mr. Pepperman."
>
>
> Hack away,
> craig bair
>
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