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Quickstart DRI OS's     Quickstart UCSD p-System     Download     Documentation     Links     Screenshots     News

Introduction:

z80pack is a Z80 cross development package for UNIX and Windows systems distributed with all sources under a BSD style license. Included are: The CPU emulation itself is generic and it can be used to emulate any Z80 based system, the I/O hardware abstraction is well isolated. Originally the software was written for emulation of proprietary Z80 controllers, to support development and testing. Of course this could not be released to the public and the systems weren't end user systems anyway.

So instead an emulation of a virtual complete computer system capable of runnning CP/M 1, CP/M 2, CP/M 3 and MP/M 2 has been build, as an example for what can be done with this software. The Z80 cross assembler was used to bootstrap CP/M 2.2 on the system, for CP/M 3 and MP/M 2 the loader BIOS's were written on an UNIX host, final work then was done under CP/M 2.2 running on the emulated system.

This virtual computer system has been used then to rebuild CP/M 1, CP/M 2, CP/M 3 and MP/M 2 completely from the sources. Also example implementations of CP/NET have been build, to network the virtual systems with this very early form of RPC (remote procedure calls). Additional disk images with all sources, tools and build scripts are available for download.

The system also runs the UCSD p-System Versions I.4, I.5, II.0 and IV.0. Disk images for a ready-to-run system as well as sources to rebuild the Z80 version are available in the download section.

Features of this virtual cpmsim computer system:

The Z80 core then was used together with John Kichury's front panel library, to build exact emulations of the Altair 8800 and IMSA 8080 computer systems, that can be fully operated via the front panel identical to the original machines. The IMSAI 3D computer model build by John is really stunning, see the screenshots at the link below.

For seeing the machinery in action here are some screenshots showing the emulated systems.

The Z80 and I/O emulations are written in ANSI C, the front panel emulation in C++, for POSIX compatible Open Systems. Systems on which the sources are known to compile without any changes are:

Other native ports to Microsoft Windows have been done, links are in the download section.

Home page of Digital Research where everything began.

All Digital Research CP/M material included was taken from The Unofficial CP/M Web site, the license for this material can be read there.
Other commercial CP/M material included was taken from CP/M Commercial Software Archive.
Some user written tools were taken from the Oak CP/M archive.
Various programs from the Walnut Creek CP/M CD-ROM have been used too, an online copy is available here.
The UCSD p-System on 8" disk images is available at Bitsavers.
For documentation and software of the old machines you should visit Bitsavers anyway.

Quickstart to run the Digital Research OS's:

  1. Download the z80pack source archive
  2. Unpack the source archive in your home directory: tar xzvf z80pack-x.y.tgz
  3. Compile the CP/M emulation:
    1. cd ~/z80pack-x.y/cpmsim/srcsim
    2. make -f Makefile.operating-system
    3. make -f Makefile.operating-system clean
  4. Compile support programs, some are needed for the emulation:
    1. Releases before 1.15: cd ~/z80pack-x.y/cpmsim/srccpm2, Releases 1.15 and later: cd ~/z80pack-x.y/cpmsim/srctools
    2. make
    3. make clean
  5. MAKE BACKUPS OF THE BOOTABLE DISK IMAGES:
    1. cd ~/z80pack-x.y/cpmsim/disks/library
    2. cp * ../backups
  6. To run CP/M 2.2:
    1. cd ~/z80pack-x.y/cpmsim
    2. ./cpm2
    3. To leave the emulation type a:bye. This program executes a Z80 HALT instruction which terminates the emulator.
  7. To run CP/M 3:
    1. cd ~/z80pack-x.y/cpmsim
    2. ./cpm3
    3. To leave the emulation type a:bye. This program executes a Z80 HALT instruction which terminates the emulator.
  8. To run MP/M 2:
    1. cd ~/z80pack-x.y/cpmsim
    2. ./mpm
      This boots CP/M 2.2, the system tracks of the disk do not contain the mpmldr program. To boot MP/M type mpmldr which runs the loader under CP/M 2.2 and boots the MP/M 2 system from the disks.
    3. To leave the emulation type a:bye. This program executes a Z80 HALT instruction which terminates the emulation.
  9. To exchange files between the UNIX host and the CP/M disk images download and install cpmtools. The emulator uses 8" SD disk drives as the first 4 drives, which also is the default used in cpmtools version 2.17 at the time of this writing. In case it changes sometime, the disk definition is:
    	diskdef ibm-3740
    	  seclen 128
    	  tracks 77
    	  sectrk 26
    	  blocksize 1024
    	  maxdir 64
    	  skew 6
    	  boottrk 2
    	  os p2dos
    	end
    
    Please note that the data tracks have a skew of 6, but the system tracks have a skew of 1, because I never implemented skews in the UNIX putsys programs. Using the correct skew made sense with Shugart floppy disk drives from 1976. Nowadays with SSD's used in personal computers transferring 500 MB/s and more the skew is only used for compatibility reasons.

    To access the 4 MB harddisk image of z80pack verify the following disk definition in /usr/local/share/diskdefs:

    	diskdef z80pack-hd
    	  seclen 128
    	  tracks 255
    	  sectrk 128
    	  blocksize 2048
    	  maxdir 1024
    	  skew 0
    	  boottrk 0
    	  os 2.2
    	end
    
    To access the 512 MB harddisk image verify this disk definition in /usr/local/share/diskdefs:
    	diskdef z80pack-hdb
    	  seclen 128
    	  tracks 256
    	  sectrk 16384
    	  blocksize 16384
    	  maxdir 8192
    	  skew 0
    	  boottrk 0
    	  os 2.2
    	end
    
    This definitions are included nowadys, if they are missing you need to add them. To access the 4 MB harddisk image (drives I: and J:) from the UNIX host always use the option -f z80pack-hd as in this example: cpmls -f z80pack-hd disks/drivei.cpm. Do not forget to use it, specially when copying files to the disk, without this option the harddisk image will be destroyed. You did make backups of the disks, did you?

    Same with the 512 MB drive P:, always use the option -f z80pack-hdb to access this drive file.

  10. Start reading documentation, understanding the disk image layout under ~/z80pack-x.y/cpmsim/disks is essential.

Quickstart to run UCSD p-System:

  1. Download the z80pack source archive
  2. Unpack the source archive in your home directory: tar xzvf z80pack-x.y.tgz
  3. Compile the CP/M emulation:
    1. cd ~/z80pack-x.y/cpmsim/srcsim
    2. make -f Makefile.operating-system
    3. make -f Makefile.operating-system clean
  4. Compile support programs, some are needed for the emulation:
    1. Releases before 1.15: cd ~/z80pack-x.y/cpmsim/srccpm2, Releases 1.15 and later: cd ~/z80pack-x.y/cpmsim/srctools
    2. make
    3. make clean
  5. Download the UCSD boot images
  6. Unpack the archive in ~/z80pack-x.y/cpmsim: tar xzvf ucsd-ix.tgz
  7. MAKE BACKUPS OF THE BOOTABLE DISK IMAGES:
    1. cd ~/z80pack-x.y/cpmsim/disks/library
    2. cp * ../backups
  8. To run UCSD p-System:
    1. cd ~/z80pack-x.y/cpmsim
    2. ./ucsd-i4 or ./ucsd-i5 or ./ucsd-ii or ./ucsd-iv
    3. To leave the emulation first shutdown the UCSD p-System from main menu with the H command, then abort cpmsim with CTRL-\
  9. To exchange files between the UNIX host and UCSD disk images download and install UCSD filesystem tools.

Downloads:

UNIX host programs
Z80 CPU simulation, Z80 cross assembler, CP/M system simulation including boot disk images with CP/M 2.2, CP/M 3, MP/M 2 and a harddisk image with many CP/M tools, language compilers etc., simulations of the Altair and IMSAI systems Download
UNIX tools to access CP/M disk images, highly recommended Link
UNIX tools to access UCSD p-System disk images, highly recommended Link
Intel PL/M-80 Cross Compiler 2.0 setup for UNIX systems. Requires GNU Fortran 77 (f77) or GNU Fortran 95 (gfortran) compiler Download
The Intel 8080 Macro Assembler Version 3.0 Fortran sources were recovered from an old Mainframe computer. I have ported the software to UNIX systems with GNU Fortran 77 (f77) or GNU Fortran 95 (gfortran) compiler.
The Intel Software Simulation of the MCS-8 8080 CPU and Memory Version 2.2 sources were recovered from an old Mainframe computer. I have ported the software to UNIX systems with GNU Fortran 77 (f77) or GNU Fortran 95 (gfortran) compiler.
Microsoft Windows host programs
Ready to run binary distribution of the Altair and IMSAI emulations, runs under Windows XP and later, and doesn't require any UNIX knowledge. This Windows package is based on the Windows port of the frontpanel library, which was contributed by Stefano Bodrato. The package includes bootable CP/M disk images for both machines. Download
Roger Ivie's Windows 2K port of z80pack Link
Disk images with Digital Research OS sources
CP/M 2.0 source disk images with build scripts to build a bootable disk Download
CP/M 2.2 source disk images with build scripts to build a bootable disk Download
Contents of the above disk images in a zip archive as requested Download
CP/M 2.2 source disk image with some of the official Digital Research patches applied to the sources. This download contains the harddisk image and shell script for Z80SIM to mount disks. The original source images need to be installed first to get the tool disks too. Download
All the sources from the disk image above in a zip archive Download
CP/M 3 source disk images with build scripts Download
All the files from the disk images above in a zip archive Download
MP/M 2 source disk images with build scripts Download
All the files from the disk images above in a zip archive Download
Bootable disk images with Digital Research CP/NET client and server
Disk images with pre-configured CP/NET 1.1 MP/M server including customized sources Download
Disk images with pre-configured CP/NET 1.1 CP/M 2.2 client including customized sources Download
Disk images with pre-configured CP/NET 1.2 MP/M server including customized sources Download
Disk images with pre-configured CP/NET 1.2 CP/M 2.2 client including customized sources Download
Bootable disk images with older Digital Research CP/M versions
Bootable disk image with the 1975 CP/M version, sources see below Download
Bootable disk image with CP/M 1.3, includes boot loader and BIOS sources Download
Bootable disk image with CP/M 1.4, includes boot loader and BIOS sources Download
Zip archive with the files from above CP/M 1.4 disk image. Please note, that the files BYE.COM (leaves Z80 CP/M emulation) and CLS.COM (clear screen of ANSI terminals), were added by me and are not part of a DRI CP/M distribution. Download
Disk images with UCSD p-System for Z80
CP/M 2.2 disk image with all sources required to build a boot record for UCSD p-System I.4, I.5 and II.0. Do not use this for IV.0. Download
Disk image with the UCSD p-System I.4 Z80 system disk, ready to boot under cpmsim. The boot code build with the disk above is written to system disk 1 already. The system is pre-configured to work with VT-100 and ANSI compatible terminals Download
Two disk images with the UCSD p-System I.5 Z80 system disks, ready to boot under cpmsim. The boot code build with the disk above is written to system disk 1 already. The system is pre-configured to work with VT-100 and ANSI compatible terminals Download
Two disk images with the UCSD p-System II.0 Z80 system disks, ready to boot under cpmsim. The boot code build with the disk above is written to system disk 1 already. The system is pre-configured to work with VT-100 and ANSI compatible terminals Download
Two disk images with the UCSD p-System IV.0 Z80 system disks, ready to boot under cpmsim. The system is pre-configured to work with VT-100 and ANSI compatible terminals Download
8" disk images with UCSD p-System I.5 for Z80, this disks have been used to build the system for Z80SIM. Download
Disk image with the modified I.5 p-code interpreter sources, used to build the system disks for z80pack Download
8" disk images with UCSD p-System II.0 for Z80, this disks have been used to build the system for Z80SIM. Please note that the disk images U132.A_PASCAL_COMPILER_SOURCE.raw and U128_L2_YALOE_SOURCE.raw at bitsavers are incomplete. This archive includes repaired images. Download
Disk image with the modified II.0 p-code interpreter sources, used to build the system disks for z80pack Download
Disk image with the linkable IV.0 p-code interpreter objects, used to build the system disks for z80pack Download
Other 8080/Z80 operating systems
CP/M 2.2 with ZCPR1 replacement for CCP, includes all sources and documentation Download
CP/M 2.2 with ZSDOS/ZCPR1 replacement for BDOS/CCP, inludes ZSDOS source and documentation. Build based on disk above. Download
Pre-configured NZ-COM Z-System with ZSDOS/ZCPR3.4 for CP/M 2.2, includes documentation Download
CP/M 2.2 with Z80CCP replacement for CCP, includes source Download
QP/M, a Z80 CP/M 2.2 clone with advanced features, BIOS with clock support available here Link
QP/M disk ready to boot, for those who don't wish to build themself Download
DOS+, a Z80 CP/M 2.2 clone with advanced features, BIOS with clock support available here Link
DOS+ disk ready to boot, for those who don't wish to build themself Download
Harddisk image with pre-installed ConIX shareware system for CP/M 2.2 Download
Disk image with MicroShell, UNIX shell features for CP/M. A PDF manual is available too below under Documentation. Download
Harddisk image with Microtools and other UNIX-like utilities for CP/M. A PDF manual is available too below. Download
Disk images with CP/M application software
Disk image with Word-Master 1.07 original files, as well as assembler patch sources for various terminals. Includes patch source for ANSI terminal that I am using and documentation also is available below. Download
Disk image with Vedit 1.34. Includes configured binary for usage with ANSI terminal and a keymap that allows to use the cursor keys. All documentation is included on the disk. Download
Disk images with more complete ISIS tools and submit script to compile PL/M programs Download
Harddisk image with Gordon Eubanks BASIC-E compiler sources, build scripts and BASIC example programs. Requires ISIS tools to build from sources, precompiled executables included. Download
Disk image with LLL Basic interpreter, published by Dr. Dobbs 1977. Disk includes sources, executable and example program. Download
Disk image with ALGOL-M compiler for CP/M written by Gary Kildalls students at Naval Postgraduate School Download
Disk image with John A. Starkweathers 8080 Pilot interpreter, published by Dr. Dobbs 1977, adapted to CP/M. Disk includes sources, executable and example program. Download
Disk image with Comal-80 Rev. 2.10 for CP/M, preconfigured for VT-100/ANSI terminals Download
Disk image with Z80MR, a Public Domain Z80 macro assembler for CP/M Download
Disk images with figFORTH 1.1 and 1.3 for 8080 and screens with editor and 8080 assembler. The sources are a little bit modified, original sources see below. Download
Harddisk image with CP/M FORTH implementations using the filesystem as block device. A readme file in user area 0 lists which FORTH systems are in the various user areas. Download
Disk image with Turbo Pascal 3.01A pre-configured for ANSI terminal emulations Download
Disk image with Q/C C compiler version 3.1a for Z80 Download
Disk image with C/80 C compiler version 3.1 for 8080 Download
Harddisk image with Z80 Hitech-C compiler V3.09 for CP/M. The compiler is configured to be used from harddisk J: and an additional make utility for CP/M 3 with example is included also. Download
Disk image with Microsoft Fortran-80 compiler version 3.44 Download
Harddisk image with Kermit 4.11 build for Z80SIM TCP/IP UART Download
Harddisk image with CP/M 3 system extensions like multiline command history.The disk includes all sources as the RSX's as well, this software requires CP/M 3. Download
Harddisk image with the CP/M help system based on help version 2.0. The help program is configured to use drive J: as default. Help files for frequently used programs are included, as well as the source for the help program. Download
Disk image with Colossal Cave adventure, version A02, 350 points Download
Disk image with Colossal Cave adventure, version B00, 550 points. Requires Z80 CPU. Download
Disk image with Colossal Cave adventure, version B01, 550 points. Identical with B00 but runs on the 8080 CPU. Download
Disk image with Colossal Cave adventure, version B03, 580 points Download
Disk image with games Rogue 1.7 and Wanderer 2.2. The disk includes QTERM patch source for the VT-100 terminal and patched executables to run with VT-100 or other ANSI compatible terminals. Download
Disk images with UCSD p-System application software
Two disk images with sources and ready to run program of Colossal Cave adventure, 500 points. Compiled and tested with II.0. Download
Disk image with Startrek game. Some procedure is to large for the I.5 and II.0 compiler, so compiled and tested with IV.0. Download
Disk image with games Blackjack, Othello and Chase. Compiled and tested with II.0. Download
Two disk images with sources, documentation and compiled programs (II.0 was used) of Prof. Ken Bowles Database Homework Project. This partially completed database starter project shows, how the p-System was used in the 80's at UCSD, to teach students the fine art of computer programming. Download
Software and Operation Manuals for front panel machines
Manuals and software for the Altair 8800 computer system Download
Manuals and software for the IMSAI 8080 computer system Download
Source files with tools and examples for various programming languages
CP/M utilities written in PL/M-80 for the Intel PL/M-80 cross compiler Download
PASCAL examples for playing with UCSD Pascal Download
PASCAL examples for playing with Turbo Pascal Download
BASIC sources for BASIC-E compiler Download
Other sources
The 1975 CP/M sources found on CPMUG disk Vol 5. Original sources from the disk, as well as overworked versions to be used on Z80SIM. Download
8080 figFORTH 1.1 original source Download
8080 figFORTH 1.3 original source
(the block management for block size 1024 is broken, I doubt that this is an original F.I.G release)
Download

Documentation:

CP/M simulator related documentation
Understanding disk images for the CP/M emulation Read
The printer device under CP/M emulation Read
The auxiliary device under CP/M emulation Read
Recompiling CP/M 2.0 from the sources Read
Recompiling CP/M 2.2 from the sources Read
Recompiling CP/M 3 from the sources Read
Recompiling MP/M 2 from the sources Read
Using the ISIS environment under CP/M 2.2 Read
Using CP/NET with Z80SIM Read
The UCSD p-System for Z80SIM Read
Z80 simulator related documentation
Installation and Test Read
Z80 cross assembler related documentation
Installation and Test Read
Digital Research Documentation
CP/M 2.2 Operating System Manual Read
CP/NET Network Operating System Reference Manual Read
Link-80 Operator's Guide Read
UCSD p-System Documentation
UCSD Pascal System I.4 Manual (PDF) Read
UCSD Pascal System I.5 Manual (PDF) Read
UCSD Pascal System II.0 User's Manual (PDF)
Also check Bitsavers for more manuals.
Read
Adaptable p-System IV Installation Guide (PDF) Read
Intel Documentation
PL/M-80 Language Summary Read
PL/M-80 Programming Manual for the ISIS system (PDF) Read
ISIS-II User's Guide (PDF) Read
ISIS Internals, a collection of computer magazine articles and notes about the inner workings of the ISIS system (PDF) Read
Other Documentation
Manuals for MicroPro Word-Master (PDF) Read
figFORTH release 1.1 for 8080 Assembly Source Listing (PDF) Read
figFORTH Installation Manual Read
Q/C Users's Manual, Version 3.2 (PDF) Read
Microshell, UNIX Features for CP/M, User's Manual Version 2.0 (PDF) Read
Microshell Newsletter, usage hints and patches for problems (PDF) Read
Microtools, UNIX-like utilities for CP/M, User's Manual (PDF) Read

Support:

This is an Open Source spare time project and there is no official support. If you can't help your self, a good place to discuss technical issues or ask about help is Usenet newsgroup comp.os.cpm.
Then there are lots of Web forums about classic computing, microcontroller programming and so on. In many you'll find members nowadays, quite familiar with z80pack.
If nothing helps and you need to talk to anyone involved in this project, you'll find working email addresses inside the download package, none provided on this Web site anymore, because of massive abusage.

Copyright, License and all that stuff:

I often get asked: may I do ... with Z80SIM?
The answer just is: yes! Everything you can download from this Web site that says: Copyright (C) ... Udo Munk is covered by the BSD license in file COPYING, you'll find in various directories of the z80pack distribution. You can do whatever you want with this software, you don't need any other permissions from me for whatever you intend to do. That includes commercial usage of this software. This software was written for using it, so use it.
Of course disk images with Digital Research software, Intel software, UCSD software, Microsoft software, Borland software and so on and so forth are not covered by this license! This software was not written by me, so it doesn't have my Copyright, so it is re-distributed under different license terms. To the best of my knowledge all this ancient software may be re-distributed for non profit hobby usage. If you find software here owned by you, that shall not be distributed, please let me know and it will get removed from this site.
Software of third parties include a file COPYING in the directory together with this software, explaining the terms of usage that the author of the software grants. This are Open Source licenses of some kind, for using the software in other projects the license should be read and the software used in conformance with the license.

Bibliography:

I still have Z80 data sheets from Zilog, Mostek and Hitachi and I also still have my CP/M 2, CP/M 3 and MP/M manuals and a bunch of other related books. All this material was used as reference to write this software. Unfortunately all this manuals are out of print, so it won't help anyone to reference it here. Instead I'm trying to provide links to online documentations, which will help you understanding this software.
  1. Everything to know about the Z80 including original Zilog data sheets can be read here.
  2. Digital Research manuals for CP/M 1, CP/M 2, CP/M 3, MP/M 2, assemblers, linkers and compilers are archived here.

Other Z80 hardware and software related links:

News & Pointers: S-100, CP/M and related sites
Gaby's Homepage for CP/M and Computer History
The Humongous CP/M Software Archives

Links to informations about the UCSD p-System:

UCSD Pascal Wikipedia
p-System: Description, Background, Utilities
The UCSD p-System Museum

Some other projects based on z80pack:

iPhone Z80 Engine
H89 Emulator - The Virtual H89 All-in-One Computer

Some other UNIX Z80 emulations:

YAZE-AG - Yet Another Z80 Emulator by AG
The SIMH Altair 8800 Z80 simulator

Some links to informations about the Altair 8800:

The Virtual Altair Museum
Altair 8800 Wikipedia
Home of the New Altair 8800 Kit
Altair 8800 Clone
Emulator of Altair 8800 Computer
MITS Altair 8800 demonstration

Some links to informations about the IMSAI 8080:

The Official IMSAI Web Site
The IMSAI Series Two project
IMSAI 8080 Wikipedia
IMSAI Front Panel Demo
Writing My First Program To Toggle In To The IMSAI 8080

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