Date   : Sat, 10 Nov 1990 02:05:29 GMT
From   : usc!sdd.hp.com!zaphod.mps.ohio-state.edu!samsung!noose.ecn.purdue.edu!mentor.cc.purdue.edu!descartes.math.purdue.edu!wilker@apple.com (Clarence Wilkerson)
Subject: CP/M C compilers

 CP/M is not public domain. The major components of CP/M
are
1) Utilities..ASM.COM, etc. There are public domain upgrades to most
of these.
2) CCP  the command line processor. There are several z80 and 8080
replacements/enhancements to this.
3) BDOS  the guts of CP/M. There are several z80 replacements in
SIMTEL20  PD2:<CPM.BDOS>. I don't know of any purely public domain
8080 versions. I have for example a dis-assembly of the DRI BDOS
but it is not public domain.
4) BIOS  this comes from the computer maker, or from you, adapted
to your machine.

There are also some integrated "ZCPR" packages for particular machines.
If you want to roll your own public domain verisons, you may need some
effort producing a bios, and producing a MOVCPM that will relocate
your "CP/M".

If you want a legal copy of CP/M, check garage sales, versions for
Apple or Commodore. As far as I know, sales to individuals of  
CP/M 2.2 or 3.0 are no longer possible in the US.
Clarence Wilkerson