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Operating Systems (8 bit, CP/M and similar)

The packages below span a wide range of available operating systems.

Package Size (ZIP) Updated (GMT) Download Contents
CP/M Version 1.4 209 KB 21 May 2014 18:20:36 download
  • Operating system
  • Customized BIOS
  • Modified bootstrap loader ROM
  • Development environment (CP/M 2.2) to create 31K and 63K version
  • ED, ASM, LOAD, DDT, SUBMIT, STAT, PIP, DUMP, SYSGEN
CP/M Version 2.2 633 KB 10 Oct 2014 20:54:54 download
  • Operating system
  • Microsoft Basic and Eliza
  • Microsoft development tools M80 and L80, debugger DDTZ
  • SPL: a compiler for a C-like, Simple Programming Language
  • PROLOGZ (interactive Prolog development environment)
  • SPL sources for PROLOGZ
  • Pascal MT+ compiler and Pascal pretty printer (Pascal source)
  • Assembler sources for CP/M 2.2 BDOS, CCP and Altair BIOS
  • Assembler source and documentation for CCPZ, a CCP replacement written for the Z80
  • .SUB files to re-create CP/M 2.2 from the supplied sources
  • Othello and Ladder (games)
  • Many utilities with SPL or assembler sources
CP/NET 1.2 and CPNOS 1.2 544 KB 21 May 2014 18:20:50 download
  • Server based on MP/M, Client based on CP/M 2.2
  • All customized sources on disks
  • CP/NET server can serve one or two CP/NET or CPNOS clients
  • Works on all platforms supported by SIMH
Personal CP/M 227 KB 21 May 2014 18:21:28 download
  • Operating system
  • Customized BIOS
  • Sources for CCP, BDOS and BIOS
CP/M Version 3 with banked memory 584 KB 21 May 2014 18:20:39 download
  • Operating system
  • Altair BIOS source
  • Support for various CP/M disk formats including Apple II CP/M
MP/M II with banked memory 237 KB 21 May 2014 18:21:08 download
  • Operating system with support for 8 banks
  • Multi terminal support for 4 terminals via Telnet
  • Multi user and multi programming
  • Altair XIOS source
DOS+ 272 KB 21 May 2014 18:20:54 download
  • Operating system
  • CP/M compatible replacement for both CCP and BDOS
  • All sources for system generation
  • Original sources are on C. B. Falconer′s site.
NovaDOS 298 KB 21 May 2014 18:21:19 download
  • CP/M 2.2 with NovaDOS as BDOS replacement
  • All sources for system generation
P2DOS 214 KB 21 May 2014 18:21:25 download
  • CP/M 2.2 with P2DOS as BDOS replacement
  • All sources for system generation
QP/M 961 KB 21 May 2014 18:21:38 download
  • QP/M 2.7 is a complete CP/M compatible replacement for CCP and BDOS from MICROCode Consulting featuring time/date stamping.
  • Includes the source of the modified BIOS, documentation, LinkZ and DebugZ. QP/M, LinkZ and DebugZ are free for non-commercial use but see the restrictions.
SuperDOS 222 KB 21 May 2014 18:21:41 download
  • CP/M 2.2 with SuperDOS as BDOS replacement
  • All sources for system generation
Z80DOS 418 KB 21 May 2014 18:21:55 download
  • CP/M 2.2 with Z80DOS as BDOS replacement
  • All sources for system generation
ZSDOS 344 KB 21 May 2014 18:22:02 download
  • CP/M 2.2 with ZSDOS as BDOS replacement
  • All sources for system generation
NZ-COM 1180 KB 21 May 2014 18:21:23 download
  • Full release of Z-System based on CP/M 2.2
  • All sources included
  • User manual in PDF format (see also the MaxZ80 tutorial by Lee Bradley)
Z3PLUS 1142 KB 21 May 2014 18:21:54 download
  • Full release of Z-System based on CP/M 3
  • All sources included
  • User manual in PDF format
TurboDOS 1.22P 502 KB 21 May 2014 18:21:44 download
  • TurboDOS 1.22P based on CP/M 3
  • AltairZ80 sources included
ZCPR3 5833 KB 21 May 2014 18:22:00 download
  • ZCPR3 based on the original by Richard Conn
  • Contributed by Steve Caldwell