Yeah, at a glance, the 0x57 doesn't look like a valid SPD DIMM. The 0x50-0x57 range is almost always for eeproms connected to the I2C bus, so it doesn't have to be a DIMM. Like I said, some processors, like Xeons have an eepom on them which show up on the system's I2C/SMBus. BTW- Have you tried running eeprom-decode.pl? It's in lm-sensors/prog/eeprom, I think. It can help decode the values of your valid SPD DIMM (timing and such). There is also a checksum value which it computes and compared with what is stored on the chip. If the checksum isn't valid, then it is almost certainly evidence that the chip isn't on a DIMM (or is corrupted). Phil On Mon, Feb 04, 2002 at 06:31:46PM +0100, Jean Delvare wrote: > > > The print_eeprom() code in prog/sensors/chips.c will only > > print out the SDRAM information if the chip is > > coded as an SDRAM, that is, location 0x02 contains 0x04. > > Which is the case for 0x50 but not for 0x57 (in my case) so it works as > expected. > > > If you send the output of either i2cdump or cat > > /proc/sys/dev/sensors/*eeprom*/* > > we can look at it. > > root at arrakis:~# cat `ls -v /proc/sys/dev/sensors/eeprom-i2c-0-50/*` > 128 8 4 12 9 2 64 0 1 117 84 0 128 16 0 1 > 15 4 6 1 1 0 14 160 96 255 255 20 15 20 45 16 > 21 8 21 8 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 18 11 > 193 73 78 70 73 78 69 79 69 72 89 83 54 52 86 49 > 54 50 50 48 71 68 76 45 55 46 53 3 201 1 56 3 > 59 173 177 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 100 199 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > > root at arrakis:~# cat `ls -v /proc/sys/dev/sensors/eeprom-i2c-0-57/*` > 0 0 0 0 0 0 0 255 255 255 255 255 255 255 255 255 > 17 67 101 64 75 102 17 198 130 218 8 0 70 67 209 98 > 69 85 48 54 48 51 0 0 0 0 0 0 0 0 0 0 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 255 > 80 67 71 45 71 82 50 49 52 69 80 40 70 82 41 0 > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 48 49 0 0 0 0 0 0 0 0 56 56 52 77 27 81 > 80 80 134 0 0 0 0 0 0 0 0 0 1 5 117 0 > 50 56 51 51 51 51 53 52 45 53 52 54 49 52 49 48 > 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > 49 49 47 49 53 47 48 49 32 49 51 58 50 54 58 51 > 55 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > > (Note that I modified the eeprom driver to show 256 bytes instead of 128.) > > The same with i2cdump, in case you prefer. > > root at arrakis:/usr/src/lm_sensors-CVS/prog/dump# ./i2cdump 0 0x50 > Warning: no size specified (using byte-data access) > WARNING! This program can confuse your I2C bus, cause data loss and worse! > I will probe file /dev/i2c-0, address 0x50, mode byte > You have five seconds to reconsider and press CTRL-C! > > 0 1 2 3 4 5 6 7 8 9 a b c d e f > 00: 80 08 04 0c 09 02 40 00 01 75 54 00 80 10 00 01 > 10: 0f 04 06 01 01 00 0e a0 60 ff ff 14 0f 14 2d 10 > 20: 15 08 15 08 ff ff ff ff ff ff ff ff ff ff ff ff > 30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff 12 0b > 40: c1 49 4e 46 49 4e 45 4f 45 48 59 53 36 34 56 31 > 50: 36 32 32 30 47 44 4c 2d 37 2e 35 03 c9 01 38 03 > 60: 3b ad b1 ff ff ff ff ff ff ff ff ff ff ff ff ff > 70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff 64 c7 > 80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > 90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > > root at arrakis:/usr/src/lm_sensors-CVS/prog/dump# ./i2cdump 0 0x57 > Warning: no size specified (using byte-data access) > WARNING! This program can confuse your I2C bus, cause data loss and worse! > I will probe file /dev/i2c-0, address 0x57, mode byte > You have five seconds to reconsider and press CTRL-C! > > 0 1 2 3 4 5 6 7 8 9 a b c d e f > 00: 00 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ff > 10: 11 43 65 40 4b 66 11 c6 82 da 08 00 46 43 d1 62 > 20: 45 55 30 36 30 33 00 00 00 00 00 00 00 00 00 00 > 30: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > 40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > 50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > 60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > 70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff > 80: 50 43 47 2d 47 52 32 31 34 45 50 28 46 52 29 00 > 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > a0: 30 31 00 00 00 00 00 00 00 00 38 38 34 4d 1b 51 > b0: 50 50 86 00 00 00 00 00 00 00 00 00 01 05 75 00 > c0: 32 38 33 33 33 33 35 34 2d 35 34 36 31 34 31 30 > d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > e0: 31 31 2f 31 35 2f 30 31 20 31 33 3a 32 36 3a 33 > f0: 37 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > > I remind you that 0x50 is the first SO-DIMM slot, working as expected. The > two questions that remain unsolved are : > 1* Why is the second slot not available ? > 2* What is showing at 0x57 ? > > -- > /~~ Jean "Khali" Delvare > -----\_ mail: delvare at ensicaen.ismra.fr > --------\ http://www.ensicaen.ismra.fr/~delvare/ > ---=ISMRA/- ____________________________________________________ -- 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
