Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!dkuug!freja.diku.dk!ncjuul
From: ncjuul@diku.dk (Niels Christian Juul)
Newsgroups: comp.arch
Subject: Re: Electrologica X8 ( Was Re: Looking for a really odd computer
Message-ID: <1990Oct13.224204.13335@diku.dk>
Date: 13 Oct 90 22:42:04 GMT
References: <11791@pucc.Princeton.EDU> <6924@uklirb.informatik.uni-kl.de> <2353@charon.cwi.nl>
Organization: Department Of Computer Science, University Of Copenhagen
Lines: 10


For the benefit of history:
This Electrologica X8 was the hardware underneath Dijkstra's classical
operating system kernel:
	THE Multiprogramming System
	(THE=Technische Hogeschool Eindhoven)
Described in Dijkstra's cacm article from 1968 where the concepts of
a hierachical kernel design is presented, including semaphore with
operations 'P' and 'V'.
Niels Chr.
-- 
-------------------------------------------------------------------------------
Niels Christian Juul				Email:   ncjuul@diku.dk
DIKU (aka Dept.Comp.Sci. Univ.Copenhagen) 	Phone:  +45 31 39 64 66 ext.405
Universitetsparken 1 -- DK 2100 Copenhagen	Direct:	+45 31 39 33 11 --  405