MS43 - Finding maps in IDA Pro?

hobbit382 · **Joined:** Thu Dec 04, 2014 10:37 pm **Posts:** 139

Dschultz... Wow. It will probably take me a week just to understand what you said. I have a lot of learning to do

Cloudforce · **Joined:** Wed Aug 27, 2014 11:57 am **Posts:** 259

hobbit382 wrote:

Dschultz... Wow. It will probably take me a week just to understand what you said. I have a lot of learning to do

We should do somekind of online chat :wink:

the learning curve is pretty steep but once you´ve done it correctly its almost straight forward, at least this chapter :lol:

Cloudforce · **Joined:** Wed Aug 27, 2014 11:57 am **Posts:** 259

Any recommendations on how to make program/code out of region around 0xB95*? Its pretty much messed up at my disassembly

dschultz · **Posted:** Tue May 12, 2015 2:29 am

The easiest way is move the area and press 'c'. It works best if you can find the beginning of a subroutine, so right after a return opcode.

Cloudforce · **Joined:** Wed Aug 27, 2014 11:57 am **Posts:** 259

Started from scratch and looking good now

One thing i just don´t quite get is how to determine what actual bit does correspond to what output stage?!

Lets use ExhaustFlap for example. The calculation is done at sub_A9114 (MS430056) and all maps and constants are known. Its checking for several things like time after engine start, min vehicle speed, if the car uses manuel or auto gearbox etc.

Finally after all the comparisons, some bits are set or cleared, depending the comparisons. But how do i find out which actual bit is used for the exhaust flap?

If its actually working like that.

mrf582 · **Posted:** Mon Jun 15, 2015 2:43 pm

Cloudforce wrote:

Finally after all the comparisons, some bits are set or cleared, depending the comparisons. But how do i find out which actual bit is used for the exhaust flap?

If its actually working like that.

That's the 'Interactive' part of IDA. You need to analyze the data, take notes, look for patterns, and basically try to be d_munter who spends hours looking at disassembly and then dreams about it at night and figures it out the next morning, lol.

Johnny_B · **Joined:** Thu May 28, 2015 5:27 pm **Posts:** 87

dschultz wrote:

Attachment:

MS43.png

In reference to this memory map (my best guess) I created a custom c166.cfg file to replace the one that comes with IDA tailored for the MS43.
Save it in the "C:\Program Files (x86)\IDA 6.7\cfg\" folder.

can you give the password ?

dschultz · **Posted:** Wed Jun 17, 2015 7:59 pm

I believe I did already.

Johnny_B · **Joined:** Thu May 28, 2015 5:27 pm **Posts:** 87

d_munter · **Posted:** Wed Jul 08, 2015 7:49 am

so, any questions?

Cloudforce · **Joined:** Wed Aug 27, 2014 11:57 am **Posts:** 259

Progress is slow but steady, so right now there are no questions from my side.

I´m just not experienced enough to do funny things like Anti-lag or no-lift shifting. Two things that would raise much attention by the upcoming turbo-users.

If you´re having an idea on how to disassemble this thing here, that would be much appreciated:

Attachment:

dsc03079kopieq0u01.jpg

alizczewy · **Posted:** Tue Jan 05, 2016 12:58 am

Hi Guys,
Great Topic!
I'd like thank for your contributions, especially for schultz.
I did few Turbo Project on MS43 in wols, but unfortunately in wols We can't do everything (ex. LC, Flat Shift or other usefull functions). So I dream that in future I will understand IDA and I'll realize my ideas. At this moment IDA is so difficult for me like wols 7 years ago, when I started.

Last night I was trying to understand what you wrote in this topic. I downloaded pliki from dschult and swap one of them in IDA's folder. Finally I've opened .bin in IDA, and everything looks fine, but one problem stopped my progress.
When I press Alt+G, I can see ,,Segment Register Value" window, but there is no 1D value there. You can see it on pic. And What I can do with that?

Attachment:

ida problem.png

cheers

dschultz · **Posted:** Tue Jan 05, 2016 2:38 pm

alizczewy wrote:

When I press Alt+G, I can see ,,Segment Register Value" window, but there is no 1D value there. You can see it on pic. And What I can do with that?

Enter 1D in the Value field (it will be there the next time you use the dialog box).

parisdog · **Joined:** Tue Aug 09, 2016 11:19 am **Posts:** 19

please can i have the password for c166.cfg?

edit
found it!

parisdog · **Joined:** Tue Aug 09, 2016 11:19 am **Posts:** 19

every time i'm trying to run script for segments i get an error.
''variable 'INF_SHOWPREF' is undefined''
any help?

RomRaider

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MS43 - Finding maps in IDA Pro?

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