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Old Fri, Nov-08-2019, 05:59:26 PM   #5191
VincentM3E36
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Default Re: Comprehensive MSS54/MSS54HP DME Information

Hi,

I'm trying to understand how is built an .0DA (or 0PA) file but I don't know yet what it is (a) and (b) (see my picture). Someone knows what does it mean ?

I notice that there is a (b) section at the beginning of slave and master data in the file but I don't know how it is built...
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File Type: png 0DA.png (22.0 KB, 41 views)
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Old Sat, Nov-09-2019, 02:07:01 PM   #5192
VincentM3E36
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Default Re: Comprehensive MSS54/MSS54HP DME Information

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Originally Posted by VincentM3E36 View Post
Hi,

I'm trying to understand how is built an .0DA (or 0PA) file but I don't know yet what it is (a) and (b) (see my picture). Someone knows what does it mean ?

I notice that there is a (b) section at the beginning of slave and master data in the file but I don't know how it is built...
(a) is single checksum character but I don't know yet what it is (b) section. I think it is related to the starting address of the data area below.

Last edited by VincentM3E36; Sat, Nov-09-2019 at 02:48:35 PM.
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Old Sun, Nov-10-2019, 05:12:40 PM   #5193
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Default Re: Comprehensive MSS54/MSS54HP DME Information

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Originally Posted by VincentM3E36 View Post
(a) is single checksum character but I don't know yet what it is (b) section. I think it is related to the starting address of the data area below.
For those who want to understand how it is built : https://en.wikipedia.org/wiki/Intel_HEX

The strange thing is why the start address of the slave data area is 0xA00000 in the .0DA file whereas it is 0x48000 in the full binary ?

Last edited by VincentM3E36; Sun, Nov-10-2019 at 06:55:28 PM.
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Old Sat, Nov-30-2019, 12:57:08 PM   #5194
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Default Re: Comprehensive MSS54/MSS54HP DME Information

Recently bought a CANdisplay to view sensorvalues from the mss54 without doubling the sensors. I have plans to run an ESSkit at some point and would like to add boost gauge to the display. Question is, can I just pin in the map-sensor and have the value distributed over CANbus to the display, or does the dme have to be rebuilt to cslspec to have that value be distributed?
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Old Thu, Jan-16-2020, 02:17:46 AM   #5195
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Default Re: Comprehensive MSS54/MSS54HP DME Information

I'm upgrading to an HP DME on my bone stock 2002 which currently runs a non-HP. This is in preparation for doing a csl airbox conversion in a few months, but in the meantime, I will run the HP DME with a stock 6MT tune. I have a few questions about the differences between the latest available US 6MT tunes for HP DMEs listed in the OP.

For context, for my non-HP DME the latest US 6MT tunes were released on Mar 13, 2009:

-Release 7.842.973, Stand: J469
-Release 7.842.971, Stand: J429

I asked about the difference between these in the past and Terra informed me that the difference is that the J429 tune is for older vehicles with an older fuel tank evap/leak detection system, and the J469 tune is for cars with a newer system (which I think was 2002 cars onwards).

There appear to be three "appropriate looking" candidate tunes for a US spec 6MT on an HP DME:

-Release 7.842.981 (Apr 23, 2009, Stand: JD39)
-Release 7.842.979 (Mar 13, 2009, Stand: J469)
-Release 7.842.977 (Mar 13, 2009, Stand: J429)

Part of me just wants to assume that the Apr 23 tune is the "correct" latest tune since it has the latest release date. But, the face that there are two tunes from Mar 13 with the same Stand numbers as the non-HP tunes, which for the non-HP indicated they were appropriate for cars with diff build dates, I would assume the same is true for these Mar 13 2009 HP tunes as well. Is this correct?

What's the difference between the Apr 23, 2009 tune and the earlier Mar 13 tunes? Is the single Apr 23 2009 tune appropriate for any 6MT US spec car regardless of the fuel tank leak thing (which I assume the two Mar 13 tunes differentiate between)? Is the Apr 23 2009 tune (JD39) perhaps for the later (2004ish+?) HP DME cars which had that extra solenoid valve in the intake system whereas earlier HP DME cars didn't?

Basically, I'm just wondering what's the best tune I should be using for my car, and whether or not I have to worry about this "Stand" number difference like I did with my non-HP DME.

Thanks!!

Last edited by ATB88; Thu, Jan-16-2020 at 02:21:52 AM.
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Old Thu, Jan-16-2020, 02:28:28 AM   #5196
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Default Re: Comprehensive MSS54/MSS54HP DME Information

JD39 is SMG despite what the label says. J469 is most likely what's correct for your car.
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Old Thu, Jan-16-2020, 03:29:04 AM   #5197
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Default Re: Comprehensive MSS54/MSS54HP DME Information

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JD39 is SMG despite what the label says. J469 is most likely what's correct for your car.
Thanks again, Terra! Out of curiosity, how do you get this information? Is there a repository of information that exists out there describing differences between some of these tunes, or is this all based on experience of having worked through disassembled code on some of these yourself?
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Old Thu, Jan-16-2020, 04:34:55 AM   #5198
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Default Re: Comprehensive MSS54/MSS54HP DME Information

Take a look in this folder for partial tunes and the model models it belongs to:
Partial Bins

I went a little further and tried to label the individual files as seen here when diving into those folders and potentially fix any misinformation:
Partial named tunes

But yes, to answer the above question, a lot came about from disassembling the code by those adept at coding (not me, I just fix computers and provide therapy to those that lost data), then comparing between files to figure out where parts of a tune are, and much more by looking at that data compared to what is called an A2L file (like a map of a world but from Siemens) for a piece of software no one has seemed to find.

In the end, with that A2L was a map to this tuned file "world". However that "map" the guys had to work with at first was for a "world" that did not exist out in the wild in the E46 M3s, and as you can see from the Partial BIN folders above, there are many "worlds". Over time, they could compare how blocks of data moved, sort of like how the continents moved, and from that we have the "maps" IE XDF Tunerpro files, that map out where bits of information are.

Much respect to the people that made this "open source" and their shared time of thousands of hours to figure this out. It is not complete, but it's complete enough to tune for just about any build, though not easy, and many ways to get to the same outcome.

Last edited by R3Z3N; Thu, Jan-16-2020 at 04:44:21 AM.
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Old Thu, Jan-16-2020, 04:51:10 AM   #5199
ATB88
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Default Re: Comprehensive MSS54/MSS54HP DME Information

Quote:
Originally Posted by R3Z3N View Post
Take a look in this folder for partial tunes and the model models it belongs to:
Partial Bins

I went a little further and tried to label the individual files as seen here when diving into those folders and potentially fix any misinformation:
Partial named tunes

But yes, to answer the above question, a lot came about from disassembling the code by those adept at coding (not me, I just fix computers and provide therapy to those that lost data), then comparing between files to figure out where parts of a tune are, and much more by looking at that data compared to what is called an A2L file (like a map of a world but from Siemens) for a piece of software no one has seemed to find.

In the end, with that A2L was a map to this tuned file "world". However that "map" the guys had to work with at first was for a "world" that did not exist out in the wild in the E46 M3s, and as you can see from the Partial BIN folders above, there are many "worlds". Over time, they could compare how blocks of data moved, sort of like how the continents moved, and from that we have the "maps" IE XDF Tunerpro files, that map out where bits of information are.

Much respect to the people that made this "open source" and their shared time of thousands of hours to figure this out. It is not complete, but it's complete enough to tune for just about any build, though not easy, and many ways to get to the same outcome.
Oh thanks, that's very helpful to see!! And w00f, yeah, as a former computer engineer I can still really only imagine how much collective effort went into this, and I feel very grateful for it :]
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Discussing Comprehensive MSS54/MSS54HP DME Information in the Coding and Tuning Forum - Discuss all avenues of coding and tuning here! at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)