Examples

Lots of eye candy here - we show examples of :-

Where the examples show using -vid-win, you'll probably want to use -vid-win-big to get a bigger window.

The example command lines are written assuming you have MEMU on the PATH, and you're in the right directory to find the files.

Where I have had to repair the original game file, I mention the nature of the repair, and I include both the patched and original file in the MEMU distribution.

MTX BASIC

To run MTX BASIC :-

$ memu -vid-win -snd-portaudio

BASIC and PANEL

Another (longwinded) way to enter MTX BASIC, is through the CP/M MTX.COM program :-

$ memu -vid-win -snd-portaudio MTX.COM

Games supplied as .MTX files

In MEMU, tape files can be run using commands similar to :-

$ memu -vid-win -snd-portaudio AGROVATA.mtx
LOAD ""
Most autostart, but you'll need to RUN some of them.

If there are multiple alternative versions of a tape file, and you need to use a particular one, you'll see [a1] or similar in the Title column.

Here is a selection of those that work in MEMU. I remember seeing about half of these back in the day, the rest are new to me :-

Title Picture Video Comments
Adventure Quest   A text adventure game.
Agrovata   A Pac-Man variant. Use AGROVATA.mtx. Doesn't load properly, must use GOTO 10 to get it to run. Don't RUN it, as that will cause it to save a useless AGROVATOR.mtx to disk.
Arcazion

[a1]
[a2]
  Like Space Invaders, by Chris Sawyer.
Astromilon youtube Like Space Invaders, by Andy Southgate. Uses the left joystick, so Z=Left, C=Right, T=Thrust, Space=Fire. So its a good idea to use the -joy-buttons "ZCT_ " option if you have a joystick. This game runs in VDP graphics mode 1, which is relatively rare. The original copy of this is corrupt, and as a result it programs illegal VDP register values, and as a result you can't see the lives, score, hi-score and game-over text. However, with a 3-byte patch to set correct VDP register values, it works fine.
Attack of the Killer Tomatoes   Like Sepulcri Scelerati. Strange keyboard controls - Z and X to turn, A to walk, Q to jump.
Backgammon

[a1]
[a2]
  Sold by Continental Software.
Blitz   A game somewhat like Space Invaders. by R. D. Longshaw. It doesn't autostart, you must RUN after loading.
Bomber   Written by Martin Allcorn. This is also available in the form of an FDX Basic file, see below.
Boris and the Bats   A platform game, sold by Tricom Software.
Bouncing Bill   Another simple platform game, by Brian Rogers.
Chamberoids

[a1]
  A great game. By Chris Sawyer.
Chess
  Chess, sold by Continental Software.
Cobra   A very simple Snakes game, by Xaviersine Audio Products The original file was too short, so I appended some padding to enable to be loaded.
Combat   A brick-out style game. Bounce the falling orange stars to break the white wall. Avoid or shoot the falling cyan bricks. Falling bricks which hit the green frog vanish. Get through the wall to win.
Comic Bakery youtube Ported from MSX to MTX by Claus Bækkel.
Cosmic Raiders youtube A variant of Space Invaders, by P. J. Green, for Continental Software. Seems to crash sometimes. Also seems to corrupt its font. Does this on real hardware as well as in MEMU.
Crystal   A Rogue like game, by Roope Kaivola.
Dennis and the Chickens   A platform game. Written by Anthony Ward, for Continental. Written in 40 column text mode, using Noddy for the levels. Left hand joystick or Z,C,B,M.
Dennis at the Circus   Another platform game. Written by Anthony Ward, for Continental.
Dennis Goes Bananas   Another platform game. Will need to RUN it after LOADing. Left hand joystick or Z,C,B,M.
Designer   A graphics designer tool.
Doodlebug Destroyer   A space shoot-em-up.
Downstream Danger   By A. Butterfield, for Megastar Games.
Dr. Frankie   A platform game by Paul M. Grant, for Syntaxsoft.
Dragons Ring   The copy of this game that I have assumes its running on an MTX500. So you must use PANEL to set LSTPG (=FA7A) to 0, then NEW, before loading it. Or, you can pass the -mem-mtx500 command line argument. Swordfighting against various adversaries. Not sure who wrote this.
Drive the C5   By Stephen Trinder, for Megastar Games.
Duckybod   The copy of this game that I have assumes its running on an MTX500. So you must use PANEL to set LSTPG (=FA7A) to 0, then NEW, before loading it. Or, you can pass the -mem-mtx500 command line argument. The keys are strange also. You need to use BRK (=Pause) to get to the start screen, and once you're playing: Z=Left, X=Right, #=Up, /=Down and Return=Jump.
Electronics   A program to help teach you electronics, by G. Wills.
Fathoms Deep   A diver game, by Steve Trinder.
Felix in the Factory   A platform game by Micropower.
Firehouse Freddy youtube A platform game, by DGC.
First Letters   A game for preschool kids.
Flummox   Shoot ships approaching from either side. By Paul Johnson, for Syntax Software. This game writes illegal VDP register values.
Football Manager   By Addictive Games.
Forth   Fig Forth by Keith Jones.
Goldmine youtube A platform game, by Ed Hollingshead, for Continental Software. Similar look to my SMG, but very different to play.
Highway Encounter   A port of a similar game seen on the ZX Spectrum. By C.Panayi, for Vortex Software. Strange keys: O, P, I, Q, 1.
Hunchy   By P Wood. Walk along the wall, jumping over arrows, and ring the bell. The original version of this hangs at the introduction screens. It is storing keyboard state at (IY), and it hasn't set the IY register to any value. As it happens, IY=0x0000, ie: in ROM, so the value never changes. My patched version simply ignores keyboard state and skips those instruction screens.
Iceberg   Like Asteroids, but with the nautical theme, by Brian Rogers.
Jack Flash   Another simple platform game, like Bouncing Bill.
Jet Bikes   A TRON style game.
Jet Set Willy   Successor to Manic Miner, by Matthew Smith. The loader plays music as it (slowly) loads the title screen, even on MEMU, where cassette loads are instantaneous. I've made a patched copy of this with "Quick Load" in its filename that loads the title screen in a couple of seconds.
Johnny Rebel

[a1]
  A union verses confederates war game.
Karate King   A martial arts fighting game, by Mike and Chris Bayne, for Megastar Games.
Les Flics   You get to steal stuff. By M.C.Blyth of P.S.S. Once loaded, start this with GOTO 3. Don't RUN it, as that will cause it to save a useless file to disk.
Lords of Time   Text adventure, from Level 9.
MTX DEMO   The original demo tape.
Missile Kommand   Missile Kommand, by Chris Sawyer. Once loaded, start this with GOTO 100. Don't RUN it, as that will cause it to save a useless file to disk.
Manic Miner   A port of the classic ZX Spectrum game.
Marbles   Not sure how to play this.
Maxima   By D. Ritchie, for Personal Software Services. Strange controls: Esc=Left, 1=Right, F5=Fire.
Miner Dick   The copy of this game that I have doesn't seem to be reliably LOADable. I suspect this could be because the code LDIRs zeros over itself. A real Z80 is fine with this, but the Z80 emulation periodically suspends to check interrupts, and afterwards it re-reads the LDIR instruction to resume, and its not there any more. Another platform game, like Manic Miner, by Richard Aplin from Micro Power.
Ms Snapman   A variation on Pac-Man, by Johan Meiring.
Munch Mania   A Snake game, by Jim Wills.
Obliteration Zone   A bit like Bomber-Man, very good to play, by Andy Southgate. Plays Hawaii Five-O in the background. I used to play this a lot, and I can manage a score of around 18000. Somewhat embarassingly my teenage son can get over 32000.
Pac Manor   A platform game. Probably a Megastar game?
Phaid   A Space Invaders variant, by K.Hook.
Pontoon   Plays Pontoon, by Mike Major.
Pontoon Blackjack   Plays Pontoon and Blackjack, by Continental Software.
Pothole Pete   A platform game in the style of Manic Miner, written by A.Butterfield and J.Wills. Interestingly this game writes VDP register 3 without correctly setting the bottom 5 bits to 1's. This game relies on the fact IN (3) returns 3. There is nothing in the Memotech hardware that ensures explicitly ensures this. So MEMU (and REMEMOTECH and REMEMOrizer) have to ensure this occurs.
PowerPac   A PacMan variant. Ported from Sord M5 to MTX by Claus Bækkel.
Quantum   A bit like Brickout, sold by Syntaxsoft.
Quasimodo's Bells   By Liam Redmond.
Quazzia

[a1]
  A Scramble variant, by Chris Sawyer, for Megastar Games. Strange keys: Shift=Up, Ctrl=Down, Space=Fire.
Quest One   A text adventure game, for Megastar.
Qogo

[a1]
youtube A Q*Bert style game, by Chris Sawyer, for Megastar Games. Movement is diagonal, and you must therefore press two direction keys at once to move. Reveal (another isometric game shown later) had a better strategy for this - it also let you press the 7,9,1,3 keys for diagonal movement. Interestingly, Sepulcri Scelerati (also by Chris Sawyer) only lets you use 7,9,1,3, not 8,4,6,2.
Qogo 2   By Chris Sawyer, for Megastar Games.
Return to Eden   Text adventure, from Level 9.
Revenge of the Chamberoids   A 3D isometric game, by Chris Sawyer, for Megastar Games. Use number pad 7,9,1,3 to move. Looks very similar to Sepulcri Scelerati, but borrows from the coloured rooms, doors and keys ideas of Chamberoids. To load this, copy REVCHAMBER2.mtx to default.mtx and then LOAD "REVCHAMBER" from within MEMU. It won't work specifying the .mtx on the command line, because the first part uses LOAD "" to load the second part.
Rolla Bearing   By A.Butterfield, for Megastar Games.
Salty Sam   Another platform game, by Dave M, for Syntaxsoft.
Sepulcri Scelerati   A 3D isometric game, by Chris Sawyer, for Megastar Games. Use number pad 7,9,1,3 to move. The original file is missing a few bytes at the end, so it is necessary to use the padded version I supply. Interestingly, this game runs partially in RELCPMH=1 mode. Also, it has a VDP interrupt routine which doesn't read the VDP status register and clear the source of the interrupt.
Slither   Yet another Snakes game. Use SLITHER.mtx, which was made by joining the loader and game file into a single file.
Sloopys Christmas

  A collection of games. Passwords for 2 and 3 are WE HATE SINCLAIR SPECTRUMS and THE RED BARON.
Snappo   Yet another Pac-Man variant, by DGC.
Snooker   A snooker program written by Godwin Graham of Magnificent 7 Software. The joystick seems to change where you hit the cue ball, the Q key makes the cue line up with different balls, and return seems to take the shot. Not sure how to select the amount of welly. You need SNOOKER.mtx and S2.mtx in the current directory to use this.
Snowball   Text adventure by Level 9.
Soldier Sam   By Liam Redmond. Need to run this with the -mem-mtx500 option.
Son Of Pete   Successor to Pothole Pete, by A.Butterfield and J.Wills, for Megastar Games. This game also relies on the fact IN (3) returns 3. There is nothing in the Memotech hardware that ensures explicitly ensures this. So MEMU (and REMEMOTECH and REMEMOrizer) have to ensure this occurs.
Soul of a Robot   Soul of a Robot, by Masertronic.
Space Invasion   Another Space Invaders game, by John Dondzila for Coleco, converted to Memotech by Crazy Boss. Apparently the Coleco has similar hardware to the MTX.
Super Minefield

[a1]
  A minesweeper style game, by Ed Hollingshead, for Continental Software.
Tapeworm

[a]
youtube A snake program, by Keith Clatworthy for Continental Software.
Target Zone

[a1]
youtube A smooth sideways scrolling shoot em up, by Chris Sawyer. The non-[a1] file seems to be either missing the header, or not be a proper .BAS file. The original [a1] was a byte too short, so I simply appended a dummy byte.
Time Bandits youtube This game has some similarity with Defender and Surface Scanner. It has the nice smooth scrolling, and the bad guys (helicopters) to come and harass your men (in trucks). It gives the illusion of parallax scrolling by scrolling the middle third (with clouds) slower than the bottom third (with the land). By P.S.S. Note that you need to use the TIMEBAND.mtx file, as the other file doesn't seem to do anything when you to try to start the game.
The Key To Time   A Dr.Who themed text adventure game by P.J.R.Harkin and J.Mullins for Lumpsoft. If you type help, it says "Never eat anything bigger than your head". Sound advice.
Theseus and the Labyrinth   A 3D maze game by Francis Wallinger of Tri-Com Software.
Time Bomb   Collect all the dots before the time runs out. Like Pac Man without the ghosts.
TNT Tim   Collect all the dots before the time runs out.
Life the Universe and Everything   A text adventure game I wrote (originally for CP/M) that was ported to MTX. Has an awful colour scheme. I don't have the CP/M UNCPM.COM file. It appears to have been sold by Tricom Software.
Vortex   Looks like the vortex game from the Adventure game TV program. By Paul Daniels. Doogy Rev.
Words and Pictures   Preschool educational.
Escape from Zarcos

[a1]
  A Manic Miner style game, by Chris Sawyer, for Megastar Games.

Games supplied as .RUN files

In MEMU, RUN files can be run using commands similar to :-

$ memu -vid-win -snd-portaudio TOADO.RUN

Or, exploiting MEMUs SDX support :-

$ memu -vid-win -snd-portaudio -sdx
USER RUN "TOADO.RUN"

Title/File Picture Video Comments
Blobbo

BLOBBO.RUN


youtube MTX
youtube ZX
A Pac-Man style game, written by Ed Hollingshead, for Continental Software. The cassette tape inlay doesn't really give any clue as to what the game is.

Aside: I wrote a clone of this for the ZX Spectrum, and the second image and video link shows my version running.
Draughts

MTXDRAG.RUN
  Draughts.
Hawk Wars

HAWKWARS.RUN
youtube A space shoot em up, by Chris Bayne. Insanely fast. Flashes the screen a lot when you die, and you will die a lot.
Kilopede

KILO.RUN
  A Centipede variant, from Continental Software. Was one of the very first arcade style games for the MTX. I think its filename may originally have been NCENT. Interestingly this game doesn't initially set the frequency of tone channel 1, and yet varies its volume to produce the background pulsing sound effect. You get a low note because the initial 0 value in the sound chip is treated as 0x400. After the first face falls from the sky, the frequency is set.
Knuckles

KNUCKLES.RUN
youtube Another game, written by Ed Hollingshead, for Continental Software.
Little Devils

DEVILS.RUN
  A game somewhat like Knuckles, by Mark Lawrence, for Syntax Software.
Mission Omega

OMEGA.RUN
youtube Chris Sawyers scramble variant. Perhaps he named it that way to contrast with my Mission Alphatron.
Murder

MURDER.RUN
  A text mode adventure game. Use delete not backspace to correct typing mistakes.
Old Mac Farmer

OLDMAC.RUN
  A bit like Pacman. Ported from MSX to MTX by Claus Bækkel.
Pacman

PACMAN.RUN
youtube The real thing, by Namcot. Ported from MSX to MTX by Claus Bækkel.
Reversi

REVERSI.RUN
  Classic Othello style game. Sold by Continental Software. The original file on disk appears to have a 1 byte corruption preventing correct keyboard operation, which I have patched. I have the assembler source for the keyboard reader that it uses, which is how I am confident of this. The file also has the word "HORIJONTALLY" (sic) in its help text.
Spectron

SPECTRON.RUN
youtube Space Invaders style of game. Published by Spectravideo. Ported from ColecoVision to MTX in 2013 by Claus Bækkel. Load from BASIC with SDX support, USER RUN "SPECTRON.RUN".
Telebunny

TBUNNY.RUN
youtube Telebunny. Published Mass Tael in 1983. Ported from MSX to MTX in 2013 by Claus Bækkel. Load from BASIC with SDX support, USER RUN "TBUNNY.RUN".
Text Mode Invaders

TMINVADE.RUN
  Martin Allcorn's bit of fun to show at Memofest 2014.
Toado

TOADO.RUN
youtube A Frogger style game, written by Ed Hollingshead, for Continental Software. The sound isn't quite right at the moment, probably due to the way in which the sound chip is emulated.

Programs supplied as .BAS files

MEMU includes some SDX Basic .BAS files. These can run using commands similar to :-

$ memu -vid-win -snd-portaudio -sdx
USER LOAD "BANANA.BAS"

BANANA.BAS and TEDDY.BAS play music, and almost all of the other Basic files are available in other formats, so no need for lots of pictures here.

Title/File Picture Video Comments
Demo

START
  A shop demo, advertising the MTX. Shows off the graphics and sound. Even includes animated simian procreation! In the basic/demo sub-directory. For some reason the basic program doesn't have .BAS file extension, so use USER LOAD "START"
F1 Simulator   Much better than Turbo. Thought to be a Syntaxsoft port of a Masertronic game. The sound doesn't match the original. The version bundled with MEMU is slightly patched to change the file extension from M/C to M_C.

MEMU also includes some FDX Basic .BAS files :-

Title/File Picture Video Comments
Bomber   Although this is already listed above as supplied in .MTX form, its listed again here because we also have it in what we think is in FDX Basic format. As these are very rare, its worth describing how it can be loaded. Unsurprisingly, it doesn't seem to load properly from SDX Basic. However, you can do something like this :-
$ cp mfloppy/andys_sys.mfloppy mfloppy/fdxbgame.mfloppy
$ cpmcp -f memotech-type07 mfloppy/fdxbgame.mfloppy \
        basic/BOMBER.BAS 0: 
$ ./memu -rom4 roms/boot-type07.rom -mon-ignore-init \
         -sdx-mfloppy mfloppy/fdxbgame.mfloppy -mw -v -s
A>FDXB
DISC LOAD "BOMBER.BAS"
Alternatively, you can :-
$ cd basic
$ ../memu -mw -v -s -fdxb FDXB.COM BOMBER.BAS
which loads using MEMUs CP/M emulation (even though FXDB.COM replaces CP/M, CBIOS and drivers).
Wall   A brickout game, by Frederik Lundkvist. I think this is an FDX Basic program as it came from an FDX system. But it can't be loaded from SDX Basic or FDX Basic. The only way to load it is to use MTXL :-
$ cd mtxl
$ ../memu -v -s MTXL.COM WALL.BAF
GOTO 10

See the MTXL.COM section of the Formats page further details on MTXL.

Memotech specific CP/M games

In MEMU, CP/M games can be run using commands similar to :-

$ memu -vid-win -snd-portaudio QUASAR.COM

First, my games (most also available as .mtx and/or .RUN files) :-

Title/File Picture Video Comments
Quasar

QUASAR.COM
  A variant on Jeff Minters Matrix game. I saw this in a computer show and thought it was so good I wrote a version for the MTX computer. It was too close to the original, and was never sold.
Nemo

NEMO.COM
youtube A Quasar variant, with a nautical theme. The snake became sharks, the X-Y zappers became electric eels, falling bombs became mines. The land was added, along with crabs on it. This version was sold by Continental Software.
Mission Alphatron

ALPHA.COM
youtube A scramble variant. This was one of my favorites, and a favorite of my friends. Since ported to 16-bit Windows 3.1, 32-bit Windows, and iPhone 1.x. There is an ALPHA.RUN file also, but I suspect this is corrupt as there are occasional screen corruptions.
Turbo

TURBO.COM

youtube A racing game. Developed while working for Continental Software. Not my finest hour. Unlike the game tape, this file has a cheat whereby pressing Space advances you to the next level (presumably for testing).
Astropac

ASTROPAC.COM
youtube Based on the similar Jet-Pac game for the Sinclair Spectrum. This game has a cheat, press Space to advance to the next level. The game also slows up depending on the number of bad guys on the screen. It does this on a real MTX too, although it may be more so on MEMU. You could try using the -speed option to run with a faster virtual Z80 processor.
Star Command

STAR.COM
  There was a game a little like this for the TI-99/4A. Internally, this had sin and cos tables, small angle rotation matrices, and divisions done by lookup-tables.
Obloids

OBLOIDS.COM
  This was a game I made up completely from scratch. The basic idea was the cells on the screen could be rotated by kicking them.
Tachyon Fighter

BUCK.COM






youtube
youtube
youtube TI-99/4A
youtube MSX
This was based on the Buck Rodgers game in the TI-99/4A. Like the game tape, this file has cheat-codes, such as typing DELTA5 taking you to level 5. Unlike the game tape, this file has a cheat whereby pressing Space advances you to the next level (presumably for testing).

This game probably was one of the ones which I ported from MTX to MSX, shown to a distributor, but was never sold. The MSX link shows the Sega Buck Rogers for MSX.

Its interesting to note that this is one of the Memotech games that someone took, patched, and sold for the Tatung Einstein! The screenshots are identical, and the disk image contains the same code, but patched to change the name, to remove my copyright, remove the reference to Continental Software, and to change the cheat-codes. Some of the ripped-off Memotech games have been renamed, some even retain their original name. The person that did this would need to be adept at disassembling games for one platform and splicing in equivalent code suitable for the other platform, and they'd also need to know the Memotech and Tatung hardware well. Hmmm....
Surface Scanner

DEFENDER.COM
youtube This was a Defender clone. It was my only game not to use VDP graphics mode 2, it used mode 1. The clever thing about this was how the smooth scrolling landscape was coded. In short, there was 8 different characters making up the landscape, each of which could have one of 8 characters to its right, and could have the character to the right scrolled into it by 4 2 pixel amounts (0, 2, 4 or 6 pixels). Sold by Megastar Games.
SMG

SMG.COM
SMG2M.COM
  Scrolling Maze Game. One of my favorites, and a favorite of my friends. A miner would run around an underground maze of tunnels, collecting 90 pots of gold, avoiding ghosts, avoiding spikes and falling to his death. A classic platform game. There was SMG with 3 mazes, and also another variant called SMG2M, which had 6 mazes. You could only see a small scrolling window over the overal maze at any one time. There were ghosts which moved on fixed tracks. There were also little flashing circular ghosts which would hunt you down. This was possible because wherever your character went, he left a trail behind him, and when the ghosts saw the trail, they would follow it. When they were in this mode they would make a ticking noise (a bit like the crocodile in Peter Pan). The trail was of a fixed length, so one trick you could do would be to reel it in by running around in circles! SMG was sold by Megastar games. I'm not sure SMG2M was, as its got "MOC" on the title screen, which stands for "Memotech Owners Club". There are also .mtx file versions of SMG.COM which also show the loading screen.
Reveal

REV.COM
  A game in which by moving your character over an invisible isometric surface, the surface is revealed, hence the name. When the surface is fully revealed, the level is complete. Of course, lots of bad guys moving about to avoid. I finished the game, but it was never commercially published to my knowledge. Ian Heath prepared the music. The initial names in the hi-score table are the names of students I went to university with. This was right at the end of my MTX games writing career, and I think Megastar may have folded around this time. Reveal also has "MOC" on its title screen.
HexTrain

HTSI.COM
  Drive your toy train around the hexagonal train set. Control your speed and change the points ahead to avoid losing points, or worse, derailing. Pick up passengers from the stations and score by taking them to their destination stations. How many passengers can you deliver safely to their desired stations before the working day ends at 17:00. Described in gory detail and downloadable from here. Too large to include in the MEMU download. Written for Memofest 2016.

Now some games written by others :-

Title/File Picture Video Comments
Angle Ball

ANGLE.COM
  A hexagonal pool game, written by Ian Heath. Uses Q=Up, A=Down, O=Left, P=Right.
Icicle Works

DT.COM
TLOAD.COM
TV.COM


youtube CP4 A boulderdash style game, by Statesoft. DT.COM loads the title page into VDP memory. TLOAD.COM loads graphics into memory, as used by TV.COM, which is the main game code. To run it, I therefore have to use :-
$ memu -iobyte 0x80 \
       -addr 0x9c29 -mem TLOAD.COM \
       -addr 0x0100 -mem TV.COM \
       -vid-win -snd-portaudio

On real MTX hardware, with a 59K CP/M boot disk, it hangs when the man moves far enough for the screen to scroll. Using a 54K CP/M boot disk seems to be fine. This is hard to debug.

It is interesting to note that this game appears to have been written as a hybrid of some high level language and assembler.

The video link is to the Commodore Plus/4 version. Coincidentally, I knew the author at university and in my early career! The Memotech version is somewhat similar, but not exactly.

Memotech specific CP/M programs

Here is the NewWord word processor, a deriviative of WordStar, shown editing VDEB.DOC as a non-document :-

$ memu -mon-win-big N.COM

It is Memotech FDX/SDX specific because it bypasses CP/M BDOS and uses driver entrypoints for keyboard and screen access, and variables in high memory unique to the FDX/SDX. When saving a file, it also specifically does a case insensitive search for the word MEMOTECH between the start of CBIOS and the top of memory, and bombs out if it doesn't find it.

The FDX specific VDEB.COM Visual Debugger (also calling itself PANEL in red text), as run using :-

$ memu -vid-win -mon-win-big VDEB.COM

The original Memotech Videowall control progam, which ran on SDX under CP/M (using the SCPM ROM), and which used MTX graphics and the centronics port to control the wall (which we disable by passing the - command line argument). Alternatively we could use the -prn-file command line option. It also uses CP/M BDOS to load and save "program sequences" :-

$ memu -vid-win VW10D4.COM -

Interestingly, when you exit this program, it doesn't attempt to go back to the CP/M prompt. Instead it boots the MTX into MTX BASIC. Not sure why I made it do this.

Geoff Boyd has slides showing Videowalls.

Generic CP/M programs

We shouldn't forget that the FDX was a good CP/M machine in general. MEMU makes a good emulation environment for CP/M programs in general.

The Caves of the Orb text mode adventure, which is a standard CP/M program, as run using :-

$ memu -mon-th ORBCPM.COM

A Level 9 Collosal Cave adventure is included too.

The standard CP/M ZSID.COM Z80 Symbolic Instruction Debugger, as run using :-

$ memu -mon-win-big ZSID.COM

CRCK44.COM is a program which calculates CRCs of files. Note the use of -mon-console (as the output from -mon-win or -mon-th would disappear after execution is complete) and the use of -mon-console-nokey as unfortunately this program keeps polling the keyboard as it runs (and with -mon-console this suspends the emulation). eg:

$ memu -mon-console -mon-console-nokey -fast CRCK44.COM '*.OVR'

CRCK version 4.4 of 10/17/82
(Ctl-C aborts, Ctl-S pauses)

---> NWMSGS  .OVR     CRC  =  DB 9D
---> NWPRINT .OVR     CRC  =  E1 49
---> NW      .OVR     CRC  =  6F 7A

Done

Another good example of using MEMU is to use the Microsoft M80 Macro Assembler and L80 Link Editor to compile PROGRAM.MAC to make PROGRAM.REL and then link it to make PROGRAM.COM :-

$ memu -mon-console -fast M80.COM =PROGRAM
$ memu -mon-console -fast L80.COM PROGRAM,PROGRAM/N/E

So far, I seem to be able to use MEMU instead of the ZEM.EXE Z80 and CP/M emulator. This emulates CP/M and runs on DOS, but this obliges me to fire up a DOS VMware virtual machine and to struggle to get files in and out of it. MEMU allows me to invoke CP/M programs from shell scripts and makefiles, and to easily access files directly on the host system.

See the CP/M section of the Emulation page for important information about how text files are handled in CP/M.