Dan Magenheimer

Writer of the first PA-RISC simulator, remote debugger, and object-code emulator for the 16-bit HP3000, Magenheimer began at HP as a member of the Processor Architecture Team that developed PA-RISC, where he also wrote the first integer multiplication algorithm and linker. He has served as a consulting developer for Oracle Corporation, working from his home in Fort Collins, Colorado, USA, on "Oracle VM," Oracle's Xen-based virtualization product, and previously worked for Hewlett Packard for over 25 years, most recently as a principal Research Scientist at HP Labs.

During the later 1980s and the 1990s, he managed various R&D teams in HP's software, server, and storage divisions. In 2001, Magenheimer joined an HP Labs team investigating security and virtualization on the Itanium platform; this team developed vBlades, the first Itanium virtual machine monitor.

When Xen was announced in 2003, he began a port of Xen to Itanium (Xen/ia64), utilizing the lessons learned in vBlades and also directly leveraging Linux/ia64 code. This effort grew to involve a multi-company, worldwide team of Itanium experts that completed the port, such that Itanium is the only fully functional non-x86 architecture in the Xen source tree.