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It was first announced by Digital Equipment Corporation (DEC) as VAX/VMS (Virtual Address eXtension/Virtual Memory System [15]) alongside the VAX-11/780 minicomputer in 1977. [16] [17] [18] OpenVMS has subsequently been ported to run on DEC Alpha systems, the Itanium-based HPE Integrity Servers, [19] and select x86-64 hardware and hypervisors. [20]
Some virtual machines, such as the popular Java virtual machines (JVM), are involved with addresses in such a way as to require safe automatic memory management by allowing the virtual machine to trace pointer references, and disallow machine instructions from manually constructing pointers to memory. Other virtual machines, such as LLVM, are ...
HotSpot, Java SE embedded edition Sun Microsystems, Oracle: 27 April 1999 ? ? Commercial Proprietary [5] HotSpot, Zero port Gary Benson [6]? ? ? Free GPL version 2 only IKVM.NET: Jeroen Frijters 28 June 2004 7.0.4335.0 5 December 2011 Free zlib License [7] JAmiga: Peter Werno, Joakim Nordström 19 May 2005 [8] 1.2 6 January 2014 Free GPL ...
Virtual memory combines active RAM and inactive memory on DASD [a] to form a large range of contiguous addresses.. In computing, virtual memory, or virtual storage, [b] is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" [3] which "creates the illusion to users of a very large (main) memory".
GCJ the GCC Java compiler, that compiles either to bytecode or to native machine code. As of GCC 7, gcj and associated libjava runtime library have been removed from GCC. [1] IKVM.NET – Java for Mono and the Microsoft .NET Framework. Uses OpenJDK. Zlib License. JamVM – developed to be an extremely small
In some respects, a system virtual machine can be considered a generalization of the concept of virtual memory that historically preceded it. IBM's CP/CMS , the first systems to allow full virtualization , implemented time sharing by providing each user with a single-user operating system, the Conversational Monitor System (CMS).
The system inherits static library conventions from BSD, with the library stored in a .a file, and can use .so-style dynamically linked libraries (with the .dylib suffix instead). Most libraries in macOS, however, consist of "frameworks", placed inside special directories called " bundles " which wrap the library's required files and metadata.
A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode. The JVM is detailed by a specification that formally describes what is required in a JVM implementation.