PCMHammer P04

[Gampy]

It unlocks just fine, seed is 0000, says it doesn't need to unlock, then reports it unlocks, it then fails (7F) on the Mode34 for the Loader.

[email protected]

-Enjoy

[antus]

OK, It looks lke this needs to be removed. viewtopic.php?f=4&t=8008&start=180#p124663 Then key of 0000 or FFFF should be tried.

I believe that is required in the app for recovery flashes to work, though, so we shouldnt remove it from the public version without re-visiting unlock in general and a code tidyup and testing these scenareos.

[Gampy]

Didn't accept FFFF unlock key ...

[email protected]

-Enjoy

[zack4200]

It sounds like you both already know that it didn't work, but here's my debug log from back to back attempted reads with the key set to 0000 and then FFFF.

[antus]

@gampy, can you try key 0000 in that build?

[Gampy]

I just woke, had that thought, did it, came to announce, saw your request to do so ...

[email protected]

Success!
PCM Recovered!

zack4200,

I'll send you a build that might recover that PCM for you, but you don't want to use it for anything else except to recover from that exact situation PERIOD!

-Enjoy

[antus]

Most excellent. I had a feeling it was seed + key 0000. There must be some code in the factory OS that implements FFFF = 0000. Maybe they know FFFF is a blank prom but wanted 0000 to signal unlocked because the suits in the office were confused by FFFF.... And that code does it to both seed and key. I can't see any other reason we'd get this seed and key, but its proven.

[zack4200]

I'll try it out after work this evening

[ProfessWRX]

Saw this in the log from Zack's P04 read.
[07:52:21:263] Read-request messages had to be re-sent 4 times.

Is this a bench setup? If it is, I'd bet that read could fail in car like mine does.

[ProfessWRX]

I've also noticed these timeouts in his and mine as well.

Code: Select all

[07:52:21:310]  	Range		File CRC		PCM CRC	Verdict	Purpose
[07:52:21:322]  XPro: 20 01 00 DE
[07:52:21:325]  TX: 6C 10 F0 3D 02 01 00 00 07 00 00
[07:52:22:332]  Timeout.. no data present A
[07:52:22:335]  CRC read failed, re-trying 00070000 / 00010000
[07:52:22:446]  RX: 6C F0 10 7D 02 01 00 00 07 00 00 DE 8C ED 49
[07:52:22:450]  070000-07FFFF	DE8CED49	DE8CED49	Same	OperatingSystem
[07:52:22:459]  XPro: 20 01 00 DE
[07:52:22:464]  TX: 6C 10 F0 3D 02 01 00 00 06 00 00
[07:52:23:468]  Timeout.. no data present A
[07:52:23:471]  CRC read failed, re-trying 00060000 / 00010000
[07:52:23:583]  RX: 6C F0 10 7D 02 01 00 00 06 00 00 9D EE 3C 36
[07:52:23:587]  060000-06FFFF	9DEE3C36	9DEE3C36	Same	OperatingSystem
[07:52:23:592]  Sending 'test device present' notification.
[07:52:23:598]  XPro: 20 01 00 DE
[07:52:23:602]  TX: 8C FE F0 3F
[07:52:23:610]  XPro: 20 01 00 DE
[07:52:23:614]  TX: 6C 10 F0 3D 02 01 00 00 05 00 00
[07:52:24:619]  Timeout.. no data present A
[07:52:24:622]  CRC read failed, re-trying 00050000 / 00010000
[07:52:24:733]  RX: 6C F0 10 7D 02 01 00 00 05 00 00 5E 95 83 14
[07:52:24:737]  050000-05FFFF	5E958314	5E958314	Same	OperatingSystem
[07:52:24:748]  XPro: 20 01 00 DE
[07:52:24:752]  TX: 6C 10 F0 3D 02 01 00 00 04 00 00
[07:52:25:758]  Timeout.. no data present A
[07:52:25:762]  CRC read failed, re-trying 00040000 / 00010000
[07:52:25:873]  RX: 6C F0 10 7D 02 01 00 00 04 00 00 6A 1D 64 54
[07:52:25:877]  040000-04FFFF	6A1D6454	6A1D6454	Same	OperatingSystem
[07:52:25:882]  Sending 'test device present' notification.