# Windows XP for Itanium Revived Through Emulator A Qemu fork brings the historic operating system back to life - **Source:** [Hacker News: Front Page](https://brifing.si/source/b07aa772-b1a0-4a76-aa18-719c6f9e2dde) - **Published:** 2026-08-03 - **Original article:** - **On Brifing:** https://brifing.si/s/8524f93a-2020-42e2-8f3e-50376b82cfd9 ## Historic Breakthrough in Itanium Emulation Malte Kuhlmann's Qemu fork successfully emulated Intel Itanium processor, enabling Windows XP/2003 to run. This achievement is significant for preserving early 2000s processor architecture. The project builds upon syunnPC's AI Itanium fork and continues development under the Merced branch on GitHub. It represents a major milestone in computer history preservation efforts. ## Cross-Compilation on macOS The developer successfully built the toolchain for Itanium on a Mac mini. Using GCC 15.3.0 and binutils 2.46.0, the cross-compilation was made possible by macOS's UNIX foundation. Homebrew-managed dependencies simplified GCC configuration. However, a zlib-related fdopen definition issue required manual intervention during the build process. ## Technical Challenges and Solutions The compilation process encountered issues like missing pthread.h, but these Linux-specific features weren't critical for emulation. Manual copying of libgcc.a was required. Qemu configuration used options like --disable-sdl and --disable-guest-agent-msi for macOS compatibility. Choosing Cocoa backend avoided dependencies on GTK+ or SDL libraries. ## Itanium Architecture and Historical Significance Co-developed by Intel and HP, Itanium (Merced) launched in 2001 with EPIC architecture. Lacking x86 compatibility, this processor was discontinued in 2020 after failing performance expectations. Open source support continues thanks to developers like René Rebe. Windows XP Itanium Edition was among the rare OS versions specifically developed for this architecture. ## Emulation Technical Details The Qemu fork compiles with ia64-softmmu target for full system emulation. Special optimizations were applied through --extra-cflags during configuration. Temporary build errors were resolved by rerunning make. The resulting binary's MD5 checksum (604ee3141ed6a34391a89a33c0019702) helps verify different XP Itanium versions. ## Open Source and Software Preservation This project serves as an important example for preserving historical software. Emulating discontinued architectures like Itanium holds great value for computer historians. Qemu's modular design enables such niche projects. The open source community's efforts contribute significantly to digital heritage conservation. ## Development Environment Setup Building the project requires adding /usr/local/ia64-linux-gnu/bin to PATH. The cross-compiler built with GCC 15.3.0 and binutils 2.46.0 generates Itanium machine code. Homebrew-installed gmp, mpfr, and mpc libraries provide necessary mathematical support. Python 3 interpreter is mandatory during configuration. ## Future of Historical Software This project marks an important milestone in preserving obsolete operating systems and hardware architectures. Emulating specialized architectures like Itanium helps understand computer history. Open source developers' efforts contribute to digital archaeology. Future projects are expected to revive other historical computing systems. ## Sources covering this story - https://virtuallyfun.com/2026/08/03/windows-xp-2002-for-the-itanium-unbridled-rage/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._