pcmhacking.net

RADustin wrote:

gmtech825 wrote:One issue I've found using ghidra for this is the tblu and tbls instructions don't dissassemble properly, especially when register A2 is involved. instead of referencing A2 for the tbl, It points to address 0x00000002. I'm currently trying to figure out how to fix this.

Anyone else seeing this issue?


EDIT: This seems to be happening for all address registers for tbl instructions

have you loaded up NSFWs cpu32 instructions?
viewtopic.php?f=42&t=6626&start=10#p104736

seems to work for bigger tables, but I still wish I could get nibble or bit mapped tables to disassemble. I'd like to learn more about the send/receive class2 data messages for gauges and bcm coms and what not.

yeah I did add the instructions. it only seems to be an issue whith the Address references. direct references to the tables seem to work

gmtech825 wrote: yeah I did add the instructions. it only seems to be an issue with the Address references. direct references to the tables seem to work

Do you have an example address location for others to look at?

Edit: I think I found an example at 0x16E0
I'm not sure if this has to do with the CPU32 Instructions that were fixed by NSFW or not.

yes exactly... 0x000016e0 should be tblun.w (A0),D0. take a look at the first four bytes of the file and you will see a ton of references to that location where functions should be referencing address registers.

is there a RAM ID file for OS ...603 anywhere public?

really struggling to define some around the idle air/area/counts logic. I've used PIDs as much as I can. A more extensive PID list would be nice as well. I have used the one offered within the pcmhammer logging github- seems pretty close.

also, could someone please break down the instructions for these mulu and divul? I know they are multiply and divide but the syntax is a little confusing compared to the elementary examples on the explanation websites.

Hi there: so far great thread.
so far your instructions have been great and the youtube link is super helpful.

Ran into a snag and had no idea where to post it, hopefully this is as good a spot to ask; I'm having problems getting ghidra to import a bin file on my laptop.

I tried again on my PC at imported a bin file just fine, same as the tutorial, and I used the same process to install ghidra, the cpu32 files, the java plugins, everything all the same but my one computer(both windows 10) doesn't seem to want to import the file.

Was hoping if I posted the failure log from my ghidra session here someone might have a suggestion what I've done incorrectly on my laptop.

I linked to your video in a thread about P04 PCM's, it was very informative and left me with a thirst for more, so I'm back here after a longish hiatus.

RADustin wrote:
Antus has posted this link before for learning 68k assembly, it is VERY useful at breaking things down in manageable bits of info so that a regular person can learn it. I like the tests that it has.
https://mrjester.hapisan.com/04_MC68/

that link is amazingly helpful, thanks for putting it here, and thanks to Antus for posting it wherever you found it!

Just going to repost the youtube link https://www.youtube.com/watch?v=iU_yiOW99pI

Thanks to ejs262 for posting the link to it here: viewtopic.php?f=42&t=3392&start=20#p119302 and to Turbo-V6 for creating the vid. Just note that you dont need to sign up to pcmhacking to download the NSFW ghidra patches.

Created a Part 2 going a little deeper into reverse engineering an Analog input.

Analog Sensor Input - Reverse Engineering LS1 ECU
https://youtu.be/PsrTgOyQSX8

bubba2533 wrote:Created a Part 2 going a little deeper into reverse engineering an Analog input.

appreciate it.

bubba2533 wrote:Created a Part 2 going a little deeper into reverse engineering an Analog input.

Analog Sensor Input - Reverse Engineering LS1 ECU
https://youtu.be/PsrTgOyQSX8

Bubba, have you played with the Ghidra plugin GptHIdra?
https://github.com/evyatar9/GptHidra