├── .directory ├── .gitattributes ├── .gitignore ├── LICENSE ├── README.md ├── SPD_DDR3_spec.pdf ├── Specification └── 4_01_02_11R21.pdf ├── arduino └── spd │ └── spd.ino ├── dumps-miscellaneous ├── dump-2-dd.bin ├── dump-crc-orig-125.bin ├── dump-crc-orig.bin ├── dump-crc.bin ├── dump-dd-mod.bin ├── dump-dd.bin ├── dump-new.spd ├── dump-orig-2gb.bin ├── dump-orig-2gb.spd ├── dump-orig.spd ├── dump-unknown-dd.bin ├── dump.spd └── spd-crc-done.bin ├── dumps ├── KINGSTON-KVR13LS9S6-2-017-A00LF.SPD ├── KINGSTON-KVR16LS11S6-2-001-A00LF-800MHz.SPD ├── KINGSTON-KVR16LS11S6-2-001-A00LF.SPD ├── KINGSTON-KVR16LS11S6-2-014-A00LF.SPD └── README.md ├── scripts ├── README.md ├── spd_read.sh └── spd_write.sh ├── structures-okteta ├── COPYING ├── spd.desktop └── spd.osd └── tools ├── README.md ├── SPD.zip └── SPDTool_063.zip /.directory: -------------------------------------------------------------------------------- 1 | [Dolphin] 2 | Timestamp=2017,1,1,13,31,38 3 | Version=3 4 | 5 | [Settings] 6 | HiddenFilesShown=true 7 | -------------------------------------------------------------------------------- /.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | 4 | # Custom for Visual Studio 5 | *.cs diff=csharp 6 | 7 | # Standard to msysgit 8 | *.doc diff=astextplain 9 | *.DOC diff=astextplain 10 | *.docx diff=astextplain 11 | *.DOCX diff=astextplain 12 | *.dot diff=astextplain 13 | *.DOT diff=astextplain 14 | *.pdf diff=astextplain 15 | *.PDF diff=astextplain 16 | *.rtf diff=astextplain 17 | *.RTF diff=astextplain 18 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | <<<<<<< HEAD 2 | # Windows image file caches 3 | Thumbs.db 4 | ehthumbs.db 5 | 6 | # Folder config file 7 | Desktop.ini 8 | 9 | # Recycle Bin used on file shares 10 | $RECYCLE.BIN/ 11 | 12 | # Windows Installer files 13 | *.cab 14 | *.msi 15 | *.msm 16 | *.msp 17 | 18 | # Windows shortcuts 19 | *.lnk 20 | 21 | # ========================= 22 | # Operating System Files 23 | # ========================= 24 | 25 | # OSX 26 | # ========================= 27 | 28 | .DS_Store 29 | .AppleDouble 30 | .LSOverride 31 | 32 | # Thumbnails 33 | ._* 34 | 35 | # Files that might appear in the root of a volume 36 | .DocumentRevisions-V100 37 | .fseventsd 38 | .Spotlight-V100 39 | .TemporaryItems 40 | .Trashes 41 | .VolumeIcon.icns 42 | 43 | # Directories potentially created on remote AFP share 44 | .AppleDB 45 | .AppleDesktop 46 | Network Trash Folder 47 | Temporary Items 48 | .apdisk 49 | ======= 50 | 51 | dumps 52 | >>>>>>> f50112c41c5e149d2f302d29327482416a3bcd33 53 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2016 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Modifying RAM SPD Data 2 | 3 | Prior research and Tools for modifying RAM SPD data in part thanks to. [More info here](http://blog.zakkemble.co.uk/modifying-ram-spd-data/). 4 | 5 | `arduino/` contains an Arduino sketch for reading SPD, modifying the max clock frequency, recalculating the CRC and writing back to the SPD. 6 | 7 | `dumps/` contains some SPD dumps from various RAM modules. 8 | 9 | `dumps-miscelaneous/` contains some SPD dumps from various unnamed RAM modules. 10 | 11 | `scripts/` contains some bash scripts for reading and writing SPD in Linux. 12 | 13 | `tools/` contains some Windows programs for SPD reading and writing. 14 | 15 | `structures/` contains an xml descriptor file for the okteta hex editor's structure plugin. 16 | 17 | `specefication/` contains SPD binary structure layout documentation and other relevant technical information. 18 | 19 | -------- 20 | 21 | [Modifying RAM SPD Data](http://blog.zakkemble.co.uk/modifying-ram-spd-data/) 22 | 23 | # SPD 24 | Hacking DDR Memory Serial Presence Detect 25 | 26 | This project aims to create an 'open source'\libre (linux) editor for DDR memory chips Serial Presence Detect Data (SPD) 27 | SPD is present on virtually all modern DDR memory modules and serves to define the operating paramters of the memory module to the computer firmware. 28 | SPD devices can be accessed via the systems built in i2c bus. 29 | Usually i2c bus 0 on any system. 30 | RAM modules are most often located at SPD bus addresses 0x50, 0x52, 0x54 etc. 31 | 32 | An easy way to access SPD devices on any linux system is to use the i2c-tools 33 | 34 | ```bash 35 | sudo su 36 | apt install -y i2c-tools (for debian/ubuntu based) 37 | modprobe i2c-dev 38 | ## On some systems i2c-i801 is needed 39 | modprobe i2c-i801 40 | 41 | ## Use i2cdetect to find the i2c bus 42 | i2cdetect -lt 43 | ## Output 44 | i2c-3 unknown NVIDIA i2c adapter 6 at 1:00.0 N/A 45 | i2c-1 unknown NVIDIA i2c adapter 1 at 1:00.0 N/A 46 | i2c-4 unknown NVIDIA i2c adapter 8 at 1:00.0 N/A 47 | i2c-2 unknown NVIDIA i2c adapter 2 at 1:00.0 N/A 48 | i2c-0 unknown NVIDIA i2c adapter 0 at 1:00.0 N/A 49 | i2c-5 unknown SMBus I801 adapter at 0400 N/A 50 | ## In this case the i2c SPD is not actually bus 0, but on bus 5, note that the i801 module was loaded 51 | this is a common issue with systems with Nvidia graphics cards or chipsets. 52 | 53 | ## A successful dump should look a little like this. (In this case a rubbish DDR3-1333 (PC3-10600) RAM module. 54 | sudo i2cdump 5 0x50 55 | No size specified (using byte-data access) 56 | WARNING! This program can confuse your I2C bus, cause data loss and worse! 57 | I will probe file /dev/i2c-5, address 0x50, mode byte 58 | Continue? [Y/n] y 59 | 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef 60 | 00: 92 10 0b 02 03 19 00 09 03 52 01 08 0c 00 3c 00 ??????.??R???.<. 61 | 10: 69 78 69 30 69 11 20 89 00 05 3c 3c 00 f0 83 01 ixi0i? ?.?<<.??? 62 | 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 63 | 30: 00 00 00 00 00 00 00 00 00 00 00 00 0f 11 01 01 ............???? 64 | 40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 65 | 50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 66 | 60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 67 | 70: 00 00 00 00 00 85 02 02 00 00 00 00 00 00 fd ba .....???......?? 68 | 80: 50 53 44 33 34 47 31 33 33 33 32 00 00 00 00 00 PSD34G13332..... 69 | 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 70 | a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 71 | b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 72 | c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 73 | d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 74 | e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 75 | f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 76 | 77 | 78 | 79 | ``` 80 | 81 | ## More to come 82 | 83 | 84 | Part of this involves: 85 | 86 | 1. Creating an xml structure definition for okteta to better work with binary SPD dumps. 87 | 2. Creating a cli tool for reading, writing and editing SPD data. 88 | -------------------------------------------------------------------------------- /SPD_DDR3_spec.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/rigred/SPD/afda9b4ed9496d02225fd9f2546e47e10f72e64e/SPD_DDR3_spec.pdf -------------------------------------------------------------------------------- /Specification/4_01_02_11R21.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/rigred/SPD/afda9b4ed9496d02225fd9f2546e47e10f72e64e/Specification/4_01_02_11R21.pdf -------------------------------------------------------------------------------- /arduino/spd/spd.ino: -------------------------------------------------------------------------------- 1 | /* 2 | * Project: Modifying RAM SPD data 3 | * Author: Zak Kemble, contact@zakkemble.co.uk 4 | * Copyright: (C) 2016 by Zak Kemble 5 | * License: GNU GPL v3 (see License.txt) 6 | * Web: http://blog.zakkemble.co.uk/modifying-ram-spd-data/ 7 | */ 8 | 9 | #include 10 | #include 11 | 12 | #define DRAM_MAX_CLK_800 0x14 13 | #define DRAM_MAX_CLK_1066 0x0F 14 | #define DRAM_MAX_CLK_1333 0x0C 15 | #define DRAM_MAX_CLK_1600 0x0A 16 | 17 | #define SPDSIZE 256 18 | #define BUFFSIZE 16 // Must be a multiple of 2, upto 256 19 | #define EEPADDR 0x50 20 | 21 | static byte spdData[SPDSIZE]; 22 | 23 | void setup() 24 | { 25 | Serial.begin(115200); 26 | 27 | byte initOK = eepInit(); 28 | if(initOK != 0) 29 | { 30 | Serial.print(F("EEPROM Init failed (")); 31 | Serial.print(initOK); 32 | Serial.println(F(")")); 33 | while(1); 34 | } 35 | 36 | // Serial.println("Init OK"); 37 | 38 | delay(2000); 39 | 40 | loadSPD(); 41 | if(!checkCRC()) 42 | { 43 | Serial.println(F("CRC failed!")); 44 | while(1); 45 | } 46 | 47 | setMaxClockSpeed(DRAM_MAX_CLK_1600); 48 | 49 | setCRC(calcCRC()); 50 | //saveSPD(); // WARNING uncomment this line at your own risk! 51 | 52 | dump(false); 53 | } 54 | 55 | void loop() 56 | { 57 | } 58 | 59 | static void loadSPD() 60 | { 61 | for(byte i=0;idump.spd` to save the data to a file. 20 | 21 | `spd_write.sh` expects the first argument to be a file with 256 hex values for writing to the RAM SPD - `spd_write.sh dump.spd`. 22 | -------------------------------------------------------------------------------- /scripts/spd_read.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | # Project: Modifying RAM SPD Data 4 | # Author: Zak Kemble, contact@zakkemble.co.uk 5 | # Copyright: (C) 2016 by Zak Kemble 6 | # Web: http://blog.zakkemble.co.uk/modifying-ram-spd-data/ 7 | 8 | # Licence: 9 | # Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) 10 | # http://creativecommons.org/licenses/by-nc-sa/4.0/ 11 | 12 | ADDRESS=0x50 # RAM module address, usually 0x50 - 0x54 13 | BUS=0 # I2C bus number, usually 0 14 | #OUTFILE="dump.spd" 15 | 16 | echoErr() 17 | { 18 | echo "$1" 1>&2 19 | } 20 | 21 | #cat /dev/null > ${OUTFILE} 22 | 23 | echo "Reading..." 24 | echo "Bus: ${BUS}" 25 | echo "Address: ${ADDRESS}" 26 | 27 | SPDDATA="" 28 | 29 | for DATAADDR in {0..255} 30 | do 31 | echo -en "\rReading: ${DATAADDR}/255" 32 | HEX=$(i2cget -y ${BUS} ${ADDRESS} ${DATAADDR}) 33 | 34 | if [ $? -ne 0 ]; then 35 | echo "" 36 | echo "Error" 37 | echo "" 38 | exit 1 39 | fi 40 | 41 | SPDDATA="${SPDDATA} ${HEX}" 42 | done 43 | 44 | echo "" 45 | echo "Done" 46 | echo "" 47 | 48 | echoErr "${SPDDATA}" 49 | #echo -n "${SPDDATA}" | xxd -r -p > ${OUTFILE} 50 | -------------------------------------------------------------------------------- /scripts/spd_write.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | # Project: Modifying RAM SPD Data 4 | # Author: Zak Kemble, contact@zakkemble.co.uk 5 | # Copyright: (C) 2016 by Zak Kemble 6 | # Web: http://blog.zakkemble.co.uk/modifying-ram-spd-data/ 7 | 8 | # Licence: 9 | # Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) 10 | # http://creativecommons.org/licenses/by-nc-sa/4.0/ 11 | 12 | ADDRESS=0x50 # RAM module address, usually 0x50 - 0x54 13 | BUS=0 # I2C bus number, usually 0 14 | INFILE="$1" 15 | 16 | if [ ! -f "${INFILE}" ]; then 17 | echo "Input file not found!" 18 | exit 1 19 | fi 20 | 21 | echo "Writing..." 22 | echo "Bus: ${BUS}" 23 | echo "Address: ${ADDRESS}" 24 | 25 | #SPDDATA=($(od -An -vtx1 ${INFILE} | tr -d '\n')) 26 | SPDDATA=($(cat ${INFILE} | tr -d '\n')) 27 | 28 | SPDDATALEN=${#SPDDATA[@]} 29 | 30 | if [ ${SPDDATALEN} != 256 ]; then 31 | echo "Invalid SPD data length (${SPDDATALEN}), should be 256" 32 | exit 1 33 | fi 34 | 35 | for DATAADDR in {0..255} 36 | do 37 | echo -en "\rWriting: ${DATAADDR}/255 (${SPDDATA[${DATAADDR}]})" 38 | 39 | echo -en " WARNING open this script, comment the sleep line and uncomment the i2cset line at your own risk! (No changes have been made)" 40 | #sleep 0.02 41 | $(i2cset -y ${BUS} ${ADDRESS} ${DATAADDR} ${SPDDATA[${DATAADDR}]}) 42 | 43 | if [ $? -ne 0 ]; then 44 | echo "" 45 | echo "Error" 46 | echo "" 47 | exit 1 48 | fi 49 | done 50 | 51 | echo "" 52 | echo "Done" 53 | -------------------------------------------------------------------------------- /structures-okteta/COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | 294 | Copyright (C) 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | , 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | -------------------------------------------------------------------------------- /structures-okteta/spd.desktop: -------------------------------------------------------------------------------- 1 | [Desktop Entry] 2 | Encoding=UTF-8 3 | Icon= 4 | Type=Service 5 | ServiceTypes=KPluginInfo 6 | 7 | Name=SPD DDR3 Structure 8 | Comment=The structure of a DDR3 SPD flash 9 | 10 | X-KDE-PluginInfo-Author= 11 | X-KDE-PluginInfo-Email= 12 | X-KDE-PluginInfo-Name=spd 13 | X-KDE-PluginInfo-Version=0.1 14 | X-KDE-PluginInfo-Website= 15 | X-KDE-PluginInfo-Category=structure 16 | X-KDE-PluginInfo-License=GPLv2 17 | X-KDE-PluginInfo-EnabledByDefault=false 18 | 19 | -------------------------------------------------------------------------------- /structures-okteta/spd.osd: -------------------------------------------------------------------------------- 1 | 2 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 53 | 54 | 58 | 59 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 82 | 83 | 90 | 91 | 92 | 93 | 94 | 101 | 102 | 110 | 111 | 112 | 113 | 114 | 118 | 119 | 123 | 124 | 128 | 129 | 130 | 131 | 132 | 138 | 139 | 145 | 146 | 147 | 148 | 149 | 156 | 157 | 161 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 | 181 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 | 201 | 202 | 203 | 204 | 205 | 206 | 207 | 208 | 209 | 210 | 211 | -------------------------------------------------------------------------------- /tools/README.md: -------------------------------------------------------------------------------- 1 | # Windows programs for reading and writing SPD data 2 | 3 | ## SPD.zip 4 | This is [EVGAs SPD tool](http://www.evga.com/articles/00466/). 5 | 6 | It can read SPD on my system (ASRock P67 EXTREME4), but not write. 7 | 8 | This tool doesn't actually write to the RAM SPD; it instead writes to a separate ROM on the motherboard which is only available on EVGA X58 Classified boards. 9 | 10 | ## SPDTool_063.zip 11 | SPDTool 0.63 12 | 13 | Old, moans about incompatible SMBus driver. Can't read or write. 14 | -------------------------------------------------------------------------------- /tools/SPD.zip: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/rigred/SPD/afda9b4ed9496d02225fd9f2546e47e10f72e64e/tools/SPD.zip -------------------------------------------------------------------------------- /tools/SPDTool_063.zip: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/rigred/SPD/afda9b4ed9496d02225fd9f2546e47e10f72e64e/tools/SPDTool_063.zip --------------------------------------------------------------------------------