$EEB and BLMs
Thread Starter
Intermediate
Joined: Feb 2007
Posts: 49
Likes: 0
From: Near Daytona Florida
.ads file and BLMs
Apart from my other post about the reflash problem, I have a question concerning the $EEB (should be .ads) definition files. I have not been able to find the Flash (should be RAM) Memory addresses for the actual BLM Table(s)! I do know where the BLM Boundarys are stored, but that doesn't help. I need the $EEB (should be .ads) file definitions for these table(s), if anyone has them, it would be greatly appreciated! Thanks, Mark
Edit: 94 LT1, MN6
Edit: Mind glitch, I misstated the question. (Parenthetical terms are correct). Please ignore this post and read post #3, by myself.
Edit: 94 LT1, MN6
Edit: Mind glitch, I misstated the question. (Parenthetical terms are correct). Please ignore this post and read post #3, by myself.
Last edited by Zabman; Jun 26, 2007 at 04:25 PM.
Burning Brakes
Joined: May 1999
Posts: 760
Likes: 1
From: Greenwich, CT
Not sure about the $EE files, but with the $8D mask, IIRC:
If you have the TC definition file, you could use the TC 'TDF Editor' to
pick out the existing table locations - but it's been quite a while
since I've had to use that feature, and my memory is fading fast.
The TDF Editor program was available on TC's site, and used to have
a free trial period. That would be one place to check, anyway.
That said, BLM is a calculated value for a fuel PID loop - as such it
it is not found in a look-up table, at least in my experience. You
would find tables for VE and engine load (air flow), but not for
calculated fuel trims per se.
See the discussion here for part of the GM PID fuel strategy, using
VE to calculate fuel load:
http://forums.corvetteforum.com/showthread.php?t=689344
BLM and INT are fuel trims (proportional gains) derived from the
O2 sensor error-corection routine (lambda control) and applied to
the fuel calc. As such they are calculated, rather than tabular values.
There's a paper here that goes into some detail on the use of fuel
trims, albeit for a different engine:
http://sunflower.com/~leroy/P4/
For anything more recent you need to work out your own code hack
I'm afraid.
If you have the TC definition file, you could use the TC 'TDF Editor' to
pick out the existing table locations - but it's been quite a while
since I've had to use that feature, and my memory is fading fast.
The TDF Editor program was available on TC's site, and used to have
a free trial period. That would be one place to check, anyway.
That said, BLM is a calculated value for a fuel PID loop - as such it
it is not found in a look-up table, at least in my experience. You
would find tables for VE and engine load (air flow), but not for
calculated fuel trims per se.
See the discussion here for part of the GM PID fuel strategy, using
VE to calculate fuel load:
http://forums.corvetteforum.com/showthread.php?t=689344
BLM and INT are fuel trims (proportional gains) derived from the
O2 sensor error-corection routine (lambda control) and applied to
the fuel calc. As such they are calculated, rather than tabular values.
There's a paper here that goes into some detail on the use of fuel
trims, albeit for a different engine:
http://sunflower.com/~leroy/P4/
For anything more recent you need to work out your own code hack
I'm afraid.
Thread Starter
Intermediate
Joined: Feb 2007
Posts: 49
Likes: 0
From: Near Daytona Florida
Thanks DoctorJ, I know all that. I was so intent on my other problem with $EEB, I mispoke. What I should have asked is: where are the BLM Values stored in RAM, and accessed by ALDL data scanning and defined in the ALDL Data Stream Definitions, (.ads) . (Just to clarify the common useage, by programmers, of "Table": The BLM values, calculated or not, must be stored somewhere, so that they can be recalled/used for other calculations. If the values are in contiguous memory locations, and are addressed by address offsets, then the area that they are stored in is usually termed a "Table".) Mark
Edit: Fixed problems in post #1 in parentheses.
Edit: Fixed problems in post #1 in parentheses.
Last edited by Zabman; Jun 26, 2007 at 04:27 PM.
Burning Brakes
Joined: May 1999
Posts: 760
Likes: 1
From: Greenwich, CT
Ah, I knew that, but I thought I'd answer the question as it was written. 
Re the RAM addresses of stored data in $EE - I dunno.
You might try the question on the TC discussion forum.
There is an EE .ads file shown on Moates' site, but it only seems to bave the
current L/R BLM numbers, not the full array of stored values for each cell - but
that's probably old information. Possibly the author of that ads got the full
ALDL definition from the EE code.
Have fun.
Re the RAM addresses of stored data in $EE - I dunno.
You might try the question on the TC discussion forum.
There is an EE .ads file shown on Moates' site, but it only seems to bave the
current L/R BLM numbers, not the full array of stored values for each cell - but
that's probably old information. Possibly the author of that ads got the full
ALDL definition from the EE code.
Have fun.
Thread Starter
Intermediate
Joined: Feb 2007
Posts: 49
Likes: 0
From: Near Daytona Florida
I finally understand my BLM question(s)! The BLM Table (Cell Map) is not in any of the ALDL data streams, like I had assumed. The BLM Table (Cell Map) is generated by post processing the values of "Current BLM Cell", "Left BLM Value"and "Right BLM Value" as a function of MAP and/or RPM, which are in the ALDL data stream. Mark
