Tricky (was ECM CODE ADJ)

[Dave Z]

> 
> 
> On Mon, 15 Feb 1999, Mike Pitts wrote:
> 
> > 
> > Yes, also you will find that adding JSR's will usually require you 
> > to move some of the original code into the JSR'd code space. When 
> > you undertake this task, you'll see what I mean.  FWIW: I wrote a 
> > little patch program that patches a binary image using Moto-S records.  
> > I can upload the source if anyone wants it.
> > 
 
I wonder if anyone could use this technique: I'm not the greatest 
engine CAL tuner, but I made a mod to my chip thats rather convenient. 
Using a JSR from just after the checksum routine, I go check the 
position of the TPS.. if the TPS is above 10%, I set a bit in a free 
ram spot. if TPS is above 50%, I set a different bit at that 
location, same for 90%. When the code has to point to the spark or 
boost tables, I JSR and include code that sets the pointer to 1 of 4 
complete sets of spark and boost tables. wow neet, a $500 thumbwheel 
chip with no thumbwheel! I thought it cleaver because at the time, I 
had no idea that thumbwheel chips existed and that others were 
already doing this.  Just an idea I thought I'd share. really ticks 
off the VALET geting a 100 hp sportscar to drive ;-) 100 for you, 260 
for me! 
Dave Z - 87 GN 12.74 @ 105 w/1.84 60'
               13.02 @ 103 on 94 octane