Operating Systems

With a 40 MIPS minimum entry-point, the 64-bit world provided by IBM’s zSeries processors is beyond the reach of most small VM and VSE enterprises, as well as z/OS developers. Pentium-based z/Architecture emulation addresses this gap and provides a lowcost, 64-bit solution for small environments. This article provides an overview of the FLEX-ES emulator architecture from Fundamental Software and discusses my company’s systems programming, performance, and compatibility experiences with FLEX-ES on a zDev server as part of IBM’s PartnerWorld for Developers (PWD) program.

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