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・ Eumathios Philokales
・ EUMC
・ Eumea
・ Eumeces
・ Eumeces blythianus
・ Eumeces schneideri
・ Eumecia
・ Eumecosomyia hambletoni
・ Eumecosomyia lacteivittata
・ Eumedes
・ Eumeekia
・ Eumeella
・ Eumegamys
・ Eumegethes
・ Eumegistus
Eumel
・ Eumelea
・ Eumelea genuina
・ Eumelea rosalia
・ Eumellitiphis
・ Eumelus
・ Eumelus of Corinth
・ Eumemmerring College
・ Eumemmerring Province
・ Eumemmerring, Victoria
・ Eumenean Hall, Davidson College
・ Eumenean Society
・ Eumenes
・ Eumenes (disambiguation)
・ Eumenes (wasp)


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Eumel : ウィキペディア英語版
Eumel

EUMEL (pronounced ''oimel'' for ''Extendable Multi User Microprocessor ELAN System'' and also known as L2 for ''Liedtke 2'') is an operating system which began as a run-time environment for the ELAN programming language. It was created in 1979 by Jochen Liedtke at the
University of Bielefeld. EUMEL initially ran on the 8-bit Z80 processor, and was later ported to many different architectures.
EUMEL is based on a virtual machine using a bitcode and achieves remarkable performance and functionality.
Z80-based EUMEL systems provide full multi-user multi-tasking operation with virtual memory management and complete isolation of one process against all others.
These systems usually execute ELAN programs faster than equivalent programs written in languages such as BASIC, Pascal, or Cobol and compiled into Z80 machine language on other operating systems.
One of the main features of EUMEL is that it is persistent, using a fixpoint/restart logic.
This means that if the power fails you only lose a couple of minutes of work: upon restart you continue working from the previous fixpoint with all program state fully intact. This is also known as orthogonal persistence.
EUMEL was followed by L3 and later L4.
==See also==

*Prof. Dr. Jochen Liedtke, Ph.D.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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