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Custom firmware allows the running of unsigned code such as homebrew applications, UMD.ISO files, emulators for other consoles and PS1 games when the disc images are converted into an EBOOT file. [17] This is in stark contrast to the official system software, where only code that has been signed by Sony can run.
PPSSPP (an acronym for "PlayStation Portable Simulator Suitable for Playing Portably") is a free and open-source PSP emulator for Windows, macOS, Linux, iOS, Android, Nintendo Wii U, Nintendo Switch, BlackBerry 10, MeeGo, Pandora, Xbox Series X/S [3] and Symbian with a focus on speed and portability. [4]
The initial version of cmd.exe for Windows NT was developed by Therese Stowell. [6] Windows CE 2.11 was the first embedded Windows release to support a console and a Windows CE version of cmd.exe. [7] The ReactOS implementation of cmd.exe is derived from FreeCOM, the FreeDOS command line interpreter. [2]
The reverse engineering process to understand the PSP hardware started shortly after the advent of homebrew unsigned code execution. This effort led to development of Toolchain [3] and SDK [4] by enthusiasts and paved the way to utilise vector floating point co-processor, GPU and audio capabilities of the device without asking Sony for permission.
In DOS 1.x, it was necessary for the CS (Code Segment) register to contain the same segment as the PSP at program termination, thus standard programming practice involved saving the DS register (since the DS register is loaded with the PSP segment) along with a zero word to the stack at program start and terminating the program with a RETF instruction, which would pop the saved segment value ...
This is a list of games for Sony's PlayStation Portable (PSP) handheld game console made available to download from the PlayStation Store.The ability to download and play these titles has varied among titles between the platforms of PSP, PlayStation Vita (PSV), PlayStation TV (PSTV), PlayStation 4 (PS4), and PlayStation 5 (PS5).
Windows includes the IExpress tool for the creation of INF-based installations. INF files form part of the Windows Setup API and of its successor, Windows Installer. The \windows\inf directory contains several such .inf files. [3] Precompiled setup Information file (*.pnf) is a binary representation of an INF file compiled by the operating system.
The native operating system of the PlayStation 4 is Orbis OS, which is a fork of FreeBSD version 9.0 which was released on January 12, 2012. [6] [7] The software development kit (SDK) is based on LLVM and Clang, [8] which Sony has chosen due to its conformant C and C++ front-ends, C++11 support, compiler optimization and diagnostics. [9]