One of the special features of the Commodore 128 is ability to run native Zilog Z80 code. Here is the source code of the latest know version of C128 CP/M v3.0 dated May 28th, 1987.

Also available for download.

For further information:

• About the CP/M
  • CP/M information provided by Herne Data Systems Ltd.
  • Commercial CP/M Software Archive at the Retrocomputing Archive
  • John Elliott's CP/M information page
  • Tim Olmstead's The "Unofficial" CP/M Web Site
  • CP/M at Wikipedia
• General Commodore information
  • Commodore B Series resource maintained by Edward D. Shockley
  • Commodore Computer - A Canadian site with a gallery, advertisement & documentation archive, and more
  • Commodore Curiosity Page available via The Internet Archive
  • The Commodore Knowledge Base and Secret Weapons of Commodore
  • COMPUTE! and COMPUTE!'s Gazette indexes & archives maintained by Kevin Savetz
  • International Documentation Project for Commodore Eight-Bits hosted by Peter Karlsson
  • The Transactor Online Archive maintained by Craig Bruce
  • Versatile Commodore Emulator VICE
  • Commodore International at Wikipedia