Installing KnightOS

Embark on an odyssey and fight all kinds of enemies and evil creatures in the 2D action game Apple Knight. This platformer has an awesome pixelized style, reminiscent of classics from the Super Nintendo or Mega Drive.

'Metroidvania', also referred to as 'Castletroid' or 'Igavania', is an umbrella term used to describe certain video games that mainly focus on exploring a map rather than straightforward progression, similar to Nintendo's Metroid series, specifically since the release of Super Metroid (Nintendo, 1994). While the term may apply to games belonging to different genres, it is mostly used for 2D. Castlevania: Curse of Darkness is an action-adventure game, part of the Castlevania franchise. It is the second 3D Castlevania title developed by Konami Computer Entertainment Tokyo following Castlevania: Lament of Innocence and was released for PlayStation 2 and Xbox in all regions except Japan, where the game was only available on PlayStation 2.

Users should first install TiLP or TI-Connect to facilitate the transfer.

1. Check your boot code version.
   • On KnightOS, look in your system settings for the boot code version.
   • On TI-OS, press MODE, then Alpha+S to enter a self test, which displays your boot code version.
   • Note: TI-84+ Color Silver Edition users can skip this check.
2. For users with boot code 1.02 or older, proceed normally. Otherwise, read below for additional instructions.
3. Remove a battery from your calculator, then plug it into your computer.
   • TI-84+ CSE users, press the 'reset' button instead of removing a battery
   • SilverLink users on Linux, see below
4. Hold down DEL, then replace the battery you removed. Release DEL.
5. Send the OS upgrade
   • For TI-Connect users, use the TI OS Downloader tool.
   • For TiLP users...
     • Windows, Mac: Use the TiLP GUI to send the OS
     • Linux: Run tilp -n <path/to/KnightOS.8xu> as root
6. Wait for it to complete, remove the cable and press ON, welcome to KnightOS!

Troublesome Boot Codes

Texas Instruments has put measures in place to prevent users from upgrading the operating system on their calculators, starting with boot code 1.03. Unfortunately, this means it will be a bit more difficult for you to install KnightOS. It is possible, so do not fear. Here are your options.

1. Patch your boot code. It is possible for calculators manufactured before a certain date to patch their boot code to remove the extra validation. This can be more dangerous than the alternatives, but is a more permanent solution. We suggest using Unsigned to patch your boot code. After doing so, follow the installation steps normally.
2. Use UOSRECV. Brandon Wilson has made a tool available that will allow you to install an unsigned OS on your device. You can get it here. Follow the installation process normally, but instead of removing a battery in step 3, run Asm(prgmUOSRECV on your calculator. Skip step 4.

TI-84+ Color Silver Edition users do not need to follow these steps unless they have trouble without, thanks to another exploit from BrandonW that allows us to circumvent the validation without a complex procedure. A similar exploit is in development for other affected calculators.

Linux and SilverLink

Linux users, please ensure that you are running the latest version of TiLP (you may have to compile it yourself). Recent updates have improved SilverLink support, but it may be buggy. Good luck.

Installing TI-OS

If you wish to reinstall TI-OS, download it from TI. Follow the same instructions for installing KnightOS, but don't worry about your boot code version.

Source Code

The source code is available on Github.
KnightOS is licensed under the MIT license.

In a surprise move, Konami has brought the classic PlayStation game Castlevania: Symphony of the Night now to iOS and Android. It was first available on the PlayStation in 1997.

The company says that the iOS version is a complete port of the full game, including original graphics and music …

The iconic game from the beloved Castlevania series finally comes to mobile. This direct port of the classic console action RPG lets you jump, dash and slash your way through Dracula’s vast castle as Alucard while encountering a unique array of enemies and characters along the way.

Rediscover the world of Castlevania with one of its original groundbreaking games and renowned music and graphics.

Konami says that it’s fully compatible with game controllers, and is available in six languages: English, Japanese, German, French, Italian, and Spanish.

The game’s Wikipedia page explains the gameplay.

Symphony of the Night uses 2-dimensional side-scrolling gameplay. The objective is exploring Dracula’s castle to defeat an entity who is controlling Richter Belmont, the self-proclaimed lord of the castle and hero of the events which took place in Castlevania: Rondo of Blood. The entity can only be seen with a particular item obtained during gameplay. Once it is defeated, the second portion of the game is revealed, eventually leading to the final battle with a newly awakened Dracula.

The game is non-linear, but most of the castle is inaccessible until various items and abilities are collected, including shapeshifting into a bat, wolf, or mist. As the player uncovers more of the castle, a map is updated to show progress.

While player characters in previous Castlevania games typically used a whip, the player can find and use a wide variety of weapons. The game includes an inventory and other RPG elements.

While some criticized it as a 2D game in what had by then become a 3D gaming world, Castlevania: Symphony of the Night won multiple awards and the original PS1 version is considered a collectible.

The game is a $2.99 download from the App Store, with no in-app purchases. It runs on both iPhone and iPad, and is compatible with the iPhone 5s or later running anything back as far as iOS 9.0.

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