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Open Mainframe Project is a Collaborative Project managed by the Linux Foundation to encourage the use of Linux-based operating systems and open source software on mainframe computers. [1] The project was announced on August 17, 2015, and was driven by IBM, a major supplier of mainframe hardware, as well as 16 other founding members, that ...
All source code is available; there are no OCO (object code only) modules. The port uses z/Architecture 64-bit addressing and therefore requires an IBM System z mainframe . Because the port depends on recently defined z/Architecture processor instructions, it requires a System z9 or later mainframe model and will not run on older machines.
The name was originally all uppercase because that was the only way to represent it in mainframe code at the time. Both editions of Mike Cowlishaw's first book on the language use all-caps, REXX, although the cover graphic uses mixed case. His book on NetRexx uses mixed case but all caps in the cover graphic with large and small caps, N ET R EXX.
Commercial Linux distributors introduced mainframe editions very quickly after the initial kernel work. IBM manager Karl-Heinz Strassemeyer of Böblingen in Germany was the main lead to get Linux running on S/390. [4] At the start of IBM's involvement, Linux patches for S/390 included some object code only (OCO) modules, without source code. [5]
Hercules is a computer emulator allowing software written for IBM mainframe computers (System/370, System/390, and zSeries/System z) and for plug compatible mainframes (such as Amdahl machines) to run on other types of computer hardware, notably on low-cost personal computers. Development started in 1999 by Roger Bowler, a mainframe systems ...
The Librarian is a version control system and source code management software product originally developed by Applied Data Research for IBM mainframe computers. It was designed to supplant physical punched card decks as a way of maintaining programs, but kept a card model in terms of its interface.
[6] [7] In February 2005, IBM announced z/VSE as successor to VSE/ESA 2.7, which was named to reflect the new System z branding for IBM's mainframe product line. [8] [9] In June 2021, 21st Century Software Inc announced that it had licensed the z/VSE source code from IBM with the intention of developing new versions of the operating system. [10]
VME (Virtual Machine Environment) is a mainframe operating system developed by the UK company International Computers Limited (ICL, now part of the Fujitsu group). Originally developed in the 1970s (as VME/B, later VME 2900) to drive ICL's then new 2900 Series mainframes, the operating system is now known as OpenVME incorporating a Unix subsystem, and runs on ICL Series 39 and Trimetra [1 ...