pcmhacking.net

Antus, Thank you for your time.

I have read someplace that there is intentionally enough capacitance (if that's the right word) built into these units to be able to gracefully shutdown on total power loss, that includes writing fault codes.

Yeah there it'll run for short moment with a complete power down, but you still need to ignition off with b+ live to update the flash. When I first wrote the vin change in ls1 flash free I was power cycling the bench PSU and the change was not persisting until I disconnected the key wire and left b+ live to allow it to shutdown cleanly.

A user from LS1Tech stepped up to create a repo. It's private so far, but I had a look inside and I like where it's going.

https://ls1tech.com/forums/pcm-diagnost ... itory.html

all p01 files work on all po1 pcms, only variation on p59 is intel or amd chip. amd pcm can only take amd file intel can only take intel.

after 03 the the iac drive only came on van and v6 p59s. www.lt1swap.com has a full list of the iac drive compatible pcms

Vampyre wrote:only variation on p59 is intel or amd chip. amd pcm can only take amd file intel can only take intel.

Sorry, that is incorrect ...

Operating systems from units with the Intel flash chip cannot be used on units with the Amd flash chip.
However, Operating systems from the Amd chipped units do in fact have Intel flash code and can be used on the Intel chipped units.

From a Flash point of view ...

Vampyre wrote:after 03 the the iac drive only came on van and v6 p59s. http://www.lt1swap.com has a full list of the iac drive compatible pcms

This is also incorrect, the 2004 Corvette & GTO use Hardware #12583659, it has IAC.

-Enjoy

Gampy wrote:

Vampyre wrote:only variation on p59 is intel or amd chip. amd pcm can only take amd file intel can only take intel.

Sorry, that is incorrect ...

Operating systems from units with the Intel flash chip cannot be used on units with the Amd flash chip.
However, Operating systems from the Amd chipped units do in fact have Intel flash code and can be used on the Intel chipped units.

From a Flash point of view ...

Vampyre wrote:after 03 the the iac drive only came on van and v6 p59s. http://www.lt1swap.com has a full list of the iac drive compatible pcms

This is also incorrect, the 2004 Corvette & GTO use Hardware #12583659, it has IAC.

-Enjoy

Weird, so they had the hardware on board for the IAC, even though all C5s and GTOs were DBW? Interesting, I did not know that.

The 2004 GTO was DBC, 05-06 GTO changed over to the E40 ECM. The reason for the IAC hardware PCM on the C5 was due to the analog AC circuitry. From my research only the PCM's with IAC drivers also got the circuitry for the analog AC request input.

So from the consensus above it appears the '9405 and equivalent OS's are intended for only the Intel chips while the rest are interchangeable to all P59's.

The repo is open!

https://github.com/BoredTruckOwner/LS_B ... Repository

If you have things to add, please send a pull request.

A lot to remember on these Blue/Green P59's, thanks for the link to the repository. I think I have it all noted now

Does PcmHammer012 check for Intel/AMD before cloning? I probably should ask this in the 012 thread, maybe I missed it there.

I hope ShorTuning doesn't mind, I edited the picture he posted earlier in this thread with the description for IAC.

In order to write to a chip it must first be identified ... So yes, PcmHammer does know what chip it is Cloning!

That does not mean it will prevent writing a Intel only Os on a AMD chip, it will write it.
Writing an Intel Only Os to an AMD chip causes no known issues other then the Os can't write to flash, thus it can't save Parameters.

That list is erroneous and incomplete.