Question for the Gurus

[robertisaar]

sometime in 2009.

[Weatheralls Auto]

Hmmmm 5.2 is 189Mb in size and I found a 5.5 thats only 87.5Mb.

I will check both out.

[robertisaar]

the 87.5 may or may not have been where i found mine....

we need a shifty eyes smiley...

[Weatheralls Auto]

Or a little DEMON smiley ?

[robertisaar]

if you see this anywhere in the URL, it's a working one...

5235650

i probably can't say much more without mods telling me we're not supposed to do that...

[SappySE107]

Huh? What are you up to?

[robertisaar]

Huh? What are you up to?

from what i can tell, making a free alternative to HPT/DHP...

[SappySE107]

That isn't illegal is it? I dunno why a mod (ha, we have mods?) cares what you are talking about unless its illegal in some way.

[robertisaar]

That isn't illegal is it? I dunno why a mod (ha, we have mods?) cares what you are talking about unless its illegal in some way.

that, no...

the discusion about how to obtain IDAPro for no money.....

[sprucegagt]

that, no...

the discusion about how to obtain IDAPro for no money.....

That's it, pick your punishment!

followed up with from the mod staff or from you to the mod staff.

[Weatheralls Auto]

Ya, I wanted to Test Drive IDA, way over my head ATM but learning lol.

Well I opened up 2 Pcms last night
This is what I found

Flash Chips
2001 Impala 3400

Intel
16236995
AB28F400BX
E5012
U8390438Q

1999 Chev Venture 3400

Intel
16236995
AB28F400BX
H3311
U0490294Y

Not sure of the differences between the Two besides last to lines, but def same family (maybe build code dates etc?)

It seems MANY MANY GM Pcms use this chip (even back to 96 4.3l in trucks I have seen)

Searching for Data on this chip, I come up to referrences to
AB28F400BX with a T90 or B90 at the end? not sure what that would be?

Also have found

http://pdf1.alldatasheet.com/datasheet-pdf/view/66159/INTEL/AB28F400BX-B90.html

which seems to reference both B and T

Here is the image of the 99 Venture

[robertisaar]

That's it, pick your punishment!

followed up with from the mod staff or from you to the mod staff.

i think the is less life-scarring than the ...

planethax: i'm not surprised that GM uses the same FLASH chips over and over, since it costs money to re-engineer for different chips. the CPU is likely identical as well.

[Weatheralls Auto]

This is the lastest info I have found (maybe some have different definitions of bootloaders? )

1) you unlock the PCM
2) set the PCM into diagnostics mode
3) request upload (to ram)
4) upload the "bootloader" after uploading you send the address in ram that you uploaded it to, this tells the PCM to reboot and start execution at that address
5) PCM reboots
6) the bootloader is listening fir commands
7) you tell the bootloader "give be bytes 1-256 of the flash" it reads them and sends you a message with the bytes in it
repeat 7 untill you have read the entire flash
9) turning the key off ... Wait 5-15 seconds... Turn key on and the ram is cleared and the pc reboots again.
Writing to the flash is about the Sam but the loader listens for write commands.

The hardest part is writing the bootloaders. They must be compiled to run on the motorolla 68332 chip. have yet to find a compiler for that chip

[robertisaar]

damn... GM went nuts on that compared to 1.5...

1-5, 9 and possibly 8 are completely skipped. i think it dumps it all at once.

[chri0029]

My '04 LA1 PCM had an AMD AM29F400BB-70SE chip in it. Attached is the AMD specs for this chip. I am not a CE, programmer, or hacker, but I would think someone could use this information to get the job done (or closer to the goal).