The Memotech MTX Series
Although not a substitute for the "look and feel" of real
vintage computer hardware, it is possible to run various CP/M
emulators on modern computer hardware such as PCs. Emulation of
a typical CP/M machine with a 4MHz Z80 processor and 64kbytes of
RAM only requires a very small amount of the available resources
on modern hardware.
|For an emulation of CP/M running on
Memotech MTX hardware,
Andy Key's MEMU is unbeatable, it offers a faithful
emulation of the full range of Memotech computer hardware,
including the systems capable of running CP/M.
The window shown here has been cropped to fit
this webpage, but if you click on the image, you can
see a sample of MEMU running in CP/M mode using one
of the available screen sizes - in this case, 2x the
native resolution of the Memotech 80 column card.
Even if your interest is not Memotech hardware,
it can be
used as a generic CP/M emulator, the fact that MEMU is emulating
Memotech hardware is almost incidental.
|There are also a number of freely
available Z80 / CP/M emulators around, there is a
good list of Z80 emulators for different platforms
on Thomas Scherrer's Z80 Emulators page.
Emulators include : 22NICE,
MyZ80 and SIMH,
one user's comparison of 22NICE and MyZ80 can be
this page on the
retrocomputing archive site
|22NICE was created by
and released as
Shareware. Please read the note on my
MTX Tools page
for my view of the current status of Sydex Shareware
| 22Nice Version 1.42
SIMH : a multi-system emulator which runs on a
number of platforms, including, Windows, Linux and
other operating systems. It is capable of emulating
a range of hardware from the likes of
Digital Equipment Corporation (DEC),
Hewlett-Packard (HP) and
It is maintained by Bob Supnik, a former DEC
engineer and VP.
|Building on the SIMH core, Peter
Schorn has developed an Altair 8800 Z80 simulator.
The Altair simulator and CP/M installation for PC,
Macintosh (OS X) and Linux, can be downloaded from
is probably the most widely recommended Z80
emulator, it was written by Simeon Cran and last
updated in 1998. Version 1.11 is
Freeware, but the last available version, 1.24,
was originally released as
Shareware. The author does not seem to be
contactable any more, so it various sites have
chosen to make that version available for download.
However, if anyone objects to the file being here,
let me know and I will remove them.
V1.11 contains a bug that prevents "RES1, C"
and "RES1, B" from working, this is
corrected in version 1.20 and above
| MyZ80 Version 1.11
| MyZ80 Version 1.24
Running the emulators on 64-bit Microsoft Windows
|Like CP/M itself, the DOS based
emulators are very old, 16-bit, applications. In
order to run them on 64-bit versions of the newer
Microsoft Windows OSs, such as Windows Vista and
Windows 7, the emulator needs to be installed in a