ECM code adjustemnet (was EPROM Emulator)

[Roger Heflin]

On Mon, 15 Feb 1999, Mike Pitts wrote:

> <<So maybe the micro code is allready there to do such a thing. and a custom
> memcal re-write is not even needed.>>
> 
> If you find one let us know.  I couldn't find one so I 
> customized the '$04' command.
> 
> <<But I bet by #$%% that is was based on what the origional engineer 
> used when the code was origionally written.>>
> 
> Be careful what you bet.  You may lose it. 8-)
> 
> I like the idea of SRAM and a one wire mod.  If someone figures 
> out how to do this, please let us know.  Like I said, I already 
> have an ALDL memory write command.
> 
> -Mike
> 
When you rewrite code, are you just kind of patching it in, ie jsr
somewhere and do the additional stuff, and then return back?  Or are
you doing more exotic stuff?   I am looking at putting in some code to
do some tricks.  My first code change is going to be a simple one,
changing a BMI to BEQ (the code is rigged to branch if the BLM(R,L) is
greater than 128, if less than 128 is uses 128 has the value, so I am
going to change things to always use 128), so it always stays safe and
runs the richest that seems reasonable.

I also want ot add some other code.  Any idea if I can expect a gain
from making a WOT fuel table for each gear?  I have figured out that
my car computer does know what gear the A4 tranny is in, and I believe
on a manual it would know gears 1-4, this code looks like the CAGS
shift adjustment on the f-bodies.  So, would adjusting the WOT fuel
for each gear help any?  I do know the O2's run pretty high in 1st,
and 2nd.

				Roger