On Sun, Jul 21, 2002 at 07:22:43PM -0400, Mark D. Studebaker wrote: > The second link was the same as the first... Oops! Here it is: http://groups.google.com/groups?q=thinkpad+770+crc&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=369C5256.520E1331%40premier1.net&rnum=1 Yeah, it could be a quick-write to 0x5C screwing things up (or a module's probing routine). Phil > Looked closer at the datasheet. > At 54-57 it is a standard 8K eeprom. > But it also responds at 0x5c, where it has the access protection > registers. > My guess is that a write quick is trashing one of the access protection > registers. > But it could also be some probe in sensors-detect. > > phil at netroedge.com wrote: > > > > Some other related info: > > > > A rant by Joe about the sensitivity of the Atmel 24rf08 causing > > Thinkpads to go dead: > > > > http://groups.google.com/groups?q=rfid+thinkpad&start=10&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=53231e6e.0205061456.19e72ef2%40posting.google.com&rnum=11 > > > > A user describing his EEPROM getting fried on his TP770 when doing a > > routine update (which wrote to the eeprom): > > > > http://groups.google.com/groups?q=rfid+thinkpad&start=10&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=53231e6e.0205061456.19e72ef2%40posting.google.com&rnum=11 > > > > Phil > > > > On Sun, Jul 21, 2002 at 06:28:30PM -0400, Mark D. Studebaker wrote: > > > Jackpot. > > > It looks to me like a standard 8K I2C eeprom, but with an RF side as > > > well. > > > Not clear why they'd misbehave. > > > I'll order some samples and we can play with them. > > > > > > > > > phil at netroedge.com wrote: > > > > > > > > I found this interesting. A guy took apart his Thinkpad 600X (one of > > > > the lm-sensors vulnerable ones) and pulled out the Atmel Flash EEPROM > > > > to reflash it: > > > > > > > > http://www.ja.olm.net/unlock/key_for_600x.htm > > > > > > > > You can get the datasheet for the AT24RF08C RFID flash eeprom here: > > > > > > > > http://www.ja.olm.net/unlock/key_for_600e.htm > > > > > > > > Strange serial eeprom device. It lives in 0x54-0x57. It's not clear > > > > to me how the chip responds to 'quick' SMBus accesses we use during > > > > probing, or how it would like being driven by our eeprom module. > > > > > > > > Anyways, note that people who have had their Thinkpad 240's killed by > > > > Lm_sensors get the error: 0188: Invalid RFID Serialization Area > > > > > > > > Could we simply blacklist the 0x54-0x57 area unless the user > > > > explicitly 'forces' regular usage of that area? > > > > > > > > Phil > > > > > > > > -- > > > > Philip Edelbrock -- IS Manager -- Edge Design, Corvallis, OR > > > > phil at netroedge.com -- http://www.netroedge.com/~phil > > > > PGP F16: 01 D2 FD 01 B5 46 F4 F0 3A 8B 9D 7E 14 7F FB 7A > > > > -- > > Philip Edelbrock -- IS Manager -- Edge Design, Corvallis, OR > > phil at netroedge.com -- http://www.netroedge.com/~phil > > PGP F16: 01 D2 FD 01 B5 46 F4 F0 3A 8B 9D 7E 14 7F FB 7A -- Philip Edelbrock -- IS Manager -- Edge Design, Corvallis, OR phil at netroedge.com -- http://www.netroedge.com/~phil PGP F16: 01 D2 FD 01 B5 46 F4 F0 3A 8B 9D 7E 14 7F FB 7A
