P04 R&W Testing

[kur4o]

When you upload first part[with read add on-the small upload2]. It takes control and run from ram for I can`t remember for how long, It also takes control of bus sending 3f every 2 seconds. When you upload more code and flash routine is still running you can read any memory location with mode 35

6c 10 f0 35 00 [yy yy] [xx xx xx]
yyyy= size
xxxxxx=address
Chipid is located at ffa18c and ffa18e , the code is uploaded at ffa000

Some example add

delay:1500
6c 10 f0 35 00 00 04 ff a1 8c:2:100

to chip id script.

While flash routine is alive you can also upload any code at any place and execute it. Using mode 36 00 and mode 36 80
You can upload the even the flash loader again at different place and run it again.

[Gampy]

I'll check this out a bit later, struggling ATM.

Thank you!

-Enjoy

[kur4o]

Gathered a script to ease things, It will print chip ID on all p04 that use 0e algo, For testing with older p03 96-97 change algo in script to 06.

Also added a warning before the script runs.

Maybe we need to add a popup with data got from script. Will think about it.

Next will be to make the script more interactive, user defined input and report output.

[Gampy]

I rolled out of my chair when I saw the popup message!!!

I'm getting,

22 AB 00 01

Shouldn't it be,

00 01 22 AB

-Enjoy

[kur4o]

I guess they are saved in reverse order, chip ID have 2 identifiers or 2 words, I put the most important first.

22ab=AMD?

[antus]

For the manufacturer field, 0001 is AMD, 0089 is Intel.

[Gampy]

22 = Chip ID
AB = Boot code sector architecture. (Boot Block (23 = Top, AB = Bottom))

0122AB = AMD 512k AM29F400BB Bottom Boot Block

Red is the product number boot code sector architecture. (T=Top, B=Bottom)

-Enjoy

[Gatecrasher]

FYI, I think the PCM in this post is called a 32U.
viewtopic.php?f=42&t=8201&start=30#p121946

The bottom of the 2nd page of this PDF mentions 96-97 as 32U and 98-03 as P04. The document is from 2003, so that's why 2004 and 2005 aren't included.
https://static.nhtsa.gov/odi/inv/2002/I ... -15709.pdf

[Gampy]

Thank you!

BTW, That puppy is one heavy sob ... It's ~2.6lbs heavier than a P01/P04.
I have not pulled it apart yet, I will and image it later, probably tomorrow.

-Enjoy

[antus]

I dont thats the 32U because its different to the 32U variant as used on Isuzu in the P01 style case. I was looking at them recently as I think they might have been used locally and I noticed it says PCM32U on the sticker. Unless PCM32U refers to the Motorola CPU32 platform and is a wider group and this is specifically an I41 pcm as in the case on the front (I for Isuzu?)