+-----------+ | Nover 3.4 | +-----------+ by Critor http://tiplanet.org 1) Introduction: ------------ Nover is a program to downclock / overclock your TI-Nspire. 2) WARNING: ------- NOTE THAT THIS PROGRAM IS DANGEROUS AND MIGHT PERMANENTLY BRICK YOUR CALCULATOR IS USED INCORRECTLY. YOU SHOULD BACKUP ALL YOUR DATA BEFORE INSTALLING IT. ACCORDING TO THE LICENCE, USING THIS PROGRAM DOES VOID YOUR WARRANTY TOO. Use it wisely. 3) What you need: ------------- - You need a TI-Nspire, TI-Nspire CAS, TI-Nspire TouchPad, TI-Nspire CAS TouchPad, TI-Nspire CX or TI-Nspire CX CAS calculator. - You need to install Ndless 3 on it or a compatible kernel. 4) Installation for automatic overclock: ------------------------------------ - Send Nover.tns to /ndless/startup/ - Reboot the calculator by either pressing the 'reset' button on the back or removing a battery. - Reactivate Ndless if your version is not reboot-proof After the reboot, the calculator will start looking for the best possible stable overclock, using the safest path. This process is only performed upon installation and won't occur again. The calculator may reboot or freeze during the process, usually 2 times for a TI-Nspire CX - this is perfectly normal. In case of a freeze (same screen displayed for several seconds), reboot the calculator. After each reboot, do reactivate Ndless if your version is not reboot-proof. Once you're back at the home screen after reactivating Ndless, installation is complete. 5) Adjusting automatic overclock: ----------------------------- The automatic overclock set previously may: - not be the best overclock - not be stable Just continue using your TI-Nspire normally for several days/weeks. If the calculator does freeze or reboot when performing official operations, then your overclock may be a little unstable. Just launch Nover, decrease the base frequency by one step and set/save it. If you have no such problem, you might want to check if you can overclock your calculator higher. Just launch Nover, increase the base frequency by one step and set/save it. 6) Advanced use: ------------ On the nover screen you can modify 3 parameters in the following order: - base frequency (direct setting) - cpu frequency (set through the base frequency divider) - ahb frequency (set through the cpu frequency divider) 7) Controls: -------- Left/right arrow or +/- to increase/decrease a parameter value. Up/down arrow to switch to another parameter. Enter to set the new configuration. Var to store current configuration to the config file (will be used on the next reboot). Shift to load configuration from the config file. Esc to go back to the OS. 8) The maximal values: ------------------ On a TI-Nspire or TI-Nspire TouchPad, you should be able to increase those parameters as much as you want. On a TI-Nspire CX, the maximal cpu frequency is usually something between 220 and 240MHz. A too high value should just freeze/reboot your system. On a TI-Nspire CX, be very carefull with the AHB frequency. A "warning" is displayed to tell you you should IMMEDIATLY STOP increasing the value and go back to a safe value. A too high value generates random read/write failures in the NAND ROM chip which will corrupt your data progressively, and we have no tool to fix the filesystem on the TI-Nspire (you'll have to reformat using the maintenance menu). To determine the maximal values on a TI-Nspire CX, you should: (this is how the automatic overclock is performed upon installation) - start with a stable config: * increase cpu to the maximum * decrease base until the cpu reaches its original frequency * decrease ahb until its warning disappears * press var to store this stable config - look for a better stable config: * increase base value by one step (ignore the cpu warning - it's not dangerous and will just reboot if it is too high) * if a warning is shown for the ahb, immediately decrease it by one step * set this config by pressing enter * exit the program by pressing esc * try to use your TI-Nspire CX normally * if there are no problems -> restart Nover press VAR to store the configuration -> retry to increase base value... 9) Recovering from a permament boot "System error": ----------------------------------------------- You set a too high AHB value on your CX and are now stuck with a permanent system boot error? Access the maintenance menu: - Use a pin to press the reset button on the back and keep it pressed. - Press and hold the 3 following keys: Home Enter EE - Release the reset button but keep holding the 3 previous keys. When the loading bar reaches 50% you should get a menu. Use option 4 to completly reformat the NAND ROM. You'll then have to reinstall an OS. If you still get the "system error", access the maintenance menu again and use option 2 to remove the OS. If you still get the "system error", access the maintenance menu again and try to use all 2-3-4 option in a various order and several times. 10) Licence: -------- GPLv2. Source code is included. You may modify the source code according to the included licence and my copyright. 10) Release history: --------------- 24.12.2020: 3.4 + disabled on TI-Nspire CX II 11.08.2016: 3.3 + max safe AHB changed from 66 to 78MHz 16.03.2016: 3.2 + TI-Nspire CX CR4 support 14.05.2015: 3.1 - More talkative automatic installation + Safest automatic overclock margin 11.08.2013: 3.0 - Automatic overclocking upon installation + fix for CPU frequency for Nspire (calc) & CX (calc + emulator) + config set is immediately effective for CX (calc) 09.04.2012: 2.1 - can now save/load config to file, and be automatically started by Ndless at boot time 19.01.2011: 2.0 - added CX support 08.01.2011: 1.1 - added touchpad & OS 2.1 support 28.12.2010: 1.0 - initial public release 11) Thanks to: --------- The TI-Planet community for their encouragements. ( http://tiplanet.org ) ExtendeD for Ndless 1.7/2.0/3.1. Bsl for Ndless 1.3/1.4. Goplat & Calc84maniac for their tests. 12) Support: ------- http://tiplanet.org