D1 Urban for 7603 ? - ie: hold manual first

[blistovmhz]

Has anyone figured out a way to get D1/Urban, aka "hold manual first" working with 7603 ? I haven't found any XDF's referencing it, but it must have been available stock (I believe).
I had it all working with HPtuners, but those guys just pissed me off far too many times and I've given up on them.

Assuming no one's ever got this working, can someone point me in the general direction in terms of how to determine if 7306 is even capable of D1 urban, and if so, a rough idea of how one would go about determining the correct table defs?

[B52Bombardier1]

Hello,

Unless somebody wrote that desired capability into an XDF for the 7603 operating system, we will never know. It doesn't sound like a feature that anybody asks for very often. Basically, the XDF definitions file exposes the different capabilities that any particular OS BIN has within it . . . to then be able to change something about that feature capability.

Maybe I don't understand what "hold manual first" is. Is it meant to maintain first gear for some length of time? If yes, why not simply drop the shift lever into D1 and mash the go pedal?

Rick

[blistovmhz]

Hello,

Unless somebody wrote that desired capability into an XDF for the 7603 operating system, we will never know. It doesn't sound like a feature that anybody asks for very often. Basically, the XDF definitions file exposes the different capabilities that any particular OS BIN has within it . . . to then be able to change something about that feature capability.

Maybe I don't understand what "hold manual first" is. Is it meant to maintain first gear for some length of time? If yes, why not simply drop the shift lever into D1 and mash the go pedal?

Rick

It's exactly that, except that it will hold 1st forever (if you program it to do so), regardless of throttle. Under the normal transmission shift pattern, D1 only holds if you're at WOT according to the 7603 xDF, and even then it can be overridden by your RPM modifier. This is very dangerous when you're doing donuts, or offroad, and you can't predict when you'll upshift to 2nd, thus losing wheel speed, catching traction, and doing a barrel roll. Same goes for steep climbs. D1, you're on your ascent, then you switch to 2nd, which causes a momentarily loss of torque, and then re-application, causing the front to lift and you flip over.

Trying to find someone who can point me the right direction with regards to just adding it to the XDF. Even just a general guideline on how to get started.

[B52Bombardier1]

Your answer in how to add it to the XDF will be buried in a good book called "The IDA Pro Book - The Unofficial Guide to the World's Most Popular Disassembler" by Chris Eagle. I'm sure there's a similar book out there for the NSA disassembler program called "Ghidra".

But neither of these disassembler methods are for mere hack PCM programmers such as myself. You gotta' be seriously into code write programming and I'm not.

Rick

[blistovmhz]

I am though :D. I've already found the correct tables in my stock BIN just by doing a simple hex search for known value sequences. The issue is that I don't know where those addresses might be in the 7603 bin, and the XDF for it is goddamned password protected for some reason. I dunno if these XDF's are encrypted (looks like they are, which sorta defeats the spirit of being open-source).
Now looking at my stock bin, given I have known values and known value sequences I can look to, it'd be relatively easy, just very time consuming to write a complete XDF for it.

I just need to get in touch with someone who's done a few, to get a bit of a primer on some specifics, and figure out why the 7603 xDF is locked.

[B52Bombardier1]

Hello,

I don't like dragging people away from one site to another but the more rabid PCM hack geeks are on a different site. I urge you to take a look at something on the link below called "Universal Patcher". It seems to have an ability to tease out things in an XDF that don't require IDA Pro or Ghidra but I don't think it'll be much help at breaking password protected XDF files.

https://pcmhacking.net/forums/viewto...6642&hilit=XDF

Rick