I wish I could help but the Bosch IC numbers seem to be super secret. You could try contacting Nyet as I think I recall him finding some Bosch IC data sheets a while back.
I really appreciate your help. As a tip I have been testing two versions of Motronic engine management, M383 and M592. At this time I am at hardware step. I found that both boards are the same (at least the same part number) and also main processor, flash, eeprom and other ICs are the same too and of course others are different. Also I have test running M383 data in a M592 ECU with it specific eeprom data and it works good, again at least on bench. ECU connectors pinout data comparison based in Autodata and other sources, show me that are identical, maybe 1 or 2 particular differences but at different pins from one to another.
Finally it main differences are in software, then my questions here points specially to some ICs (that I think that could be drivers) that changes from one versionto another, let me think that those could an upgrade/replacement from one to each other, like 30381 <-> 30382 (very similar in part number, location and function - I think - ) and the other case, 30424 <-> 30389 (that goes in the same places, but I can not find it relationship).
