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Wikipedia: CP/M - http://en.wikipedia.org/wiki/CP/M
Encyclopedia article, with links to many related topics.
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CP/M Main Page - http://www.seasip.demon.co.uk/Cpm/
Resource on technical internals, software, utilities, many links; by John Elliott.
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ZCN - http://www.ibiblio.org/zcn/
Operating system for Amstrad NC100 Notepad and NC200 Notebook; mostly compatible with CP/M 2.2; descriptions, documents, downloads. Free.
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The Unofficial CP/M Website - http://www.cpm.z80.de/
CP/M binaries and documentation, including the original source code and manuals.
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Commercial CP/M Software Archive - http://www.retroarchive.org/cpm/
A collection of CP/M software, including source codes and documentations.
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CP/M - The First PC Operating System - http://www.digitalresearch.biz/CPM.HTM
Information about the history of CP/M and Digital Research. Links to various CP/M resources.
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Joe Wein's DRI page - http://www.joewein.de/dri.html
Some notes about Gary Kildall, CP/M and Microsoft from a former DRI programmer.
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CP/M Center - http://www.gaby.de/ecpm.htm
Information about CP/M and links to various CP/M resources.
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Commodore and CP/M - http://www.herne.com/cpm.htm
Technical description of Commodore's implementation of CP/M Plus in C128, including a couple of tools.
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California Digital, Inc. - http://www.cadigital.com
A company that still sells CP/M.
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Z-Node 51 - http://www.znode51.de/indexe.htm
Downloads and information for CP/M, Z-systems and Z80 computers. Includes a collection of articles and manuals, too.
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CP/M 3 patches for Spectrum and Amstrad - http://www.cpmspectre.pwp.blueyonder.co.uk/cpm/cpm-indx.htm
CP/M patches for Spectrum +3 and Amstrad PcW16.
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comp.os.cpm Frequently Asked Questions. - http://www.cpmspectre.pwp.blueyonder.co.uk/cpm/cpm_faq.htm
Frequently asked questions about comp.os.cpm.
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OAK Repository - CP/M Archive (mirror) - ftp://ftp.mayn.de/pub/cpm/
German mirror of the largest public CP/M archive.
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