[Simh] RT-11 source

[Nelson H. F. Beebe]

Ray Jewhurst <raywjewhurst at gmail.com> asks today for documented
operating system source code for the PDP-11.  Besides the Lions' Unix
v6 code, there is also Doug Comer's Xinu project about which he wrote
several books.  Current versions are targeted at x86 and ARM CPUs,

	http://www.xinu.cs.purdue.edu/

but he still provides code for older systems (PDP-11, SPARC, VAX):

	ftp://ftp.cs.purdue.edu/pub/comer/

There is more about him here, including links to his books Web site:

	https://en.wikipedia.org/wiki/Douglas_Comer

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