festy, I should go back and check, but how are you doing this without the Motronic ECU?
With great difficulty
I found a schematic diagram of the ML4.1, so can trace some of the peripheral connections back to the CPU, then hunt for references to that hardware port to narrow down the different functions.
Did you find a complete, umm, readout on the Internet?
Yes, I've got hold of a couple of eprom dumps from various 75s/164s - the one I'm concentrating on is version 1267356191 (ECU 0261200108), mask 021F.
How deep into the program are you on a percentage basis? Or is it an almost never ending series of 'rooms'...or should I say, an enigma within an enigma within...?
I'm picking away at bits of 'obvious' code (easy wins) and hunting for the 'interesting' functions - sort of prioritising the battle.
There's so much in these, that I doubt I'll ever completely work it all out.
For instance, the different fuel/lambda settings effectively quadruple the program, something as simple as determining the spark advance has maybe a hundred branches in the code, I'm slowly working through what each of these concerns and haven't even got to the tables each consults yet
Do you know of someone who has a running TS installed who might be willing to be a beta tester (or would it be alpha tester)? Others might not agree, but it would be great (for me) if someone has rebuilt theirs using 10.5:1 pistons, had everything balanced, and the flywheel lightened a bit. I realize the latter does nothing but make the engine rev more easily.
Having a TS to test with would certainly make this easier, but unfortunately I don't have that option.
The engine mods are meaningless for the ECU mapping, changing cams/compression/injectors etc won't make any difference to what the ECU code does. Obviously if I was to try and edit the tables to suit a modified engine then having one on hand would be best, but I'm aiming more towards a simple DIY tuning interface rather than making chips for people.
Jim K once again I want to thank you for commenting that there are no aftermarket electronic systems that covers as many aspects of the running of the engine than the stock one's do. Okay, poor terminology on my part. It gives me a better feeling that sticking with the Motronic system is the wise thing to do - short of someone who has modified their TS beyond what the stock unit could handle.
The ML4.1 will never be suitable for a MAP based system, and the rev limit can't be pushed too much higher due to the slow CPU (it has to count a lot of teeth per RPM!) - so although it does a lot more than an aftermarket, it's not cutting edge technology and has it's limitations. For a race engine, I wouldn't use one of these - and honestly, if I owned a TS I would ditch the ECU and use a MAP based system like is on my alfetta.
You think the Bosch covers a lot, it's got nothing on the delco
And again, this technical part is so beyond me - and I suspect a few others - but think it is nifty that there are several here who do have a working knowledge of the 'inner workings' of the Motronic ECU.
What I'm hoping to end up with is a way for the average TS owner to make tuning adjustments themselves. With a very modest hardware cost (under $100) and the software, you'd be able to browse through the list of settings and maps, and adjust to suit - without having to know anything about the inner workings.
The rev limit pic I posted this morning is an example - anyone with a $30 eprom burner and a spare flash chip could do it themselves right now.