oops!  Unless you can read my mind, you need the URL for the screen shot:

 www . foxhollow . ca / CPMduino.png              <== removes spaces for picture

user libraries are installed here:   C:\Users\mbramwell\Documents\Arduino\libraries\SdFat

stock libraries are here:  C:\Program Files (x86)\Arduino\libraries

If you un-install arduino, only the C:\Program Files (x86)\Arduino\libraries gets removed.  The user libraries stay in your c:\users\...\documents folder.  I wonder if you have a SdFat library stored there.

Oh ok ... I am an Arduino newbie, so let me check there for something... and ...

Tada... there's a SdFat library there. Removing it gets me to the obvious SdFat.h missing, so that's definitely the one being used.

It came from https://github.com/greiman/SdFat

newly installed OS.  Arduino installed for the 1st time.  Your results are promising.  

You do not mention sdFat. 

I just removed sdFat from libraries and of course I get "fatal error: SdFat.h: No such file or directory".  Did you just happen to have a SdFat directory in documents\Arduino\libraires ?

I have placed a screenshot of my library menu open.  Look way down at the bottom.  See under Contributed libraries?  It shows SdFat.  Since you do not mention that you added SdFat, I wonder if it shows up on that list. If yes, the library is in your userid Documents folder and not in your c:\program files(86)\arduino\libraries folder (and probably survived your PC reload if you have backed up your documents folder).

FYI: I have more than 1 laptop.  I have arduino.cc installed on one laptop and arduino.org installed on the other. I have been playing with arduino boards for a LONG time. This feels like a file/library difference problem.

I have given it a try.  Still no go.  "abstraction_arduino.h:189:7: error: 'class SdFile' has no member named 'getFilename'"

The arduino community seems broken.  arduino.cc versus arduino.org

The arduino.cc IDE is 1.6.6   It has the most features but less compatible.  I had to change some other sketches to make them compile with the latest IDE.

The arduino.org IDE is 1.7.7 but seems to be older. My old sketches compile without changes but the IDE does not have the boards & library updating features.

There are MANY sdfat libraries out there.  I have tried them all.  They are all very similar but not identical. If you manage to get it to compile on your computer, let me know exactly what software components you used.  I'll keep trying random things in case I get lucky.

If someone has this working, exactly what IDE version did you use and what sdfat library?

Don't worry ... we will get to the bottom of this.

I will put my lab back together later today and rebuild the code.

I have followed these steps:

1 - Went to arduino.cc, downloaded and installed Arduino 1.6.6;

2 - Added support to Arduino DUE under tools->board->boards manager;

3 - Ran all updates for Arduino (the IDE offered updates, which I accepted);

4 - Compiled the code;

5 - Got a few warnings regarding use of NULL on arith. and string conversion;

6 - Loaded the code onto the board and it seems to work with no glitches.

Not sure if it inherited anything from the previous installation, which I removed completely, but all I needed seemed to be available and I didn't have to import any extra libraries.

Do you have multiple Arduino IDEs installed? Maybe the system PATH is pointing to wrong compilers?

I was using arduino 1.6.5 with the lastest sdfat lib from greiman.  Lots of errors.  

A few days ago I updated to the 'just released' 1.6.6.  Different errors but they all seem to relate to the sdfat library.  Specifically I get "CPMduino:9: error: 'SdFat' does not name a type     SdFat SD;"

I have gone through the arduino IDE and updated all boards and libraries to the latest. I feel if the root cause of the first error is resolved, all the other SD errors would disappear.

I think this is the one I used: https://github.com/adafruit/SD

Please give it a try and let me know.

Cheers,

Marcelo.

 I have a DEU, shield but I cannot get the sdfat to compile. I think I have the latest of EVERYTHING.  I get a few errors on compile. 

I have CPM running under Linux. I also have a Cromemco Z2 S100 box.  I would like to get this compiled on a nodeMCU/ESP8266 with an eventual telnet server instead of serial I/O.

What specific vesion of sdfat should I find?

Hi Mark,

I don't remember which version I used. Since I did it I had my computer reinstalled and ended up losing my original Arduino environment.

What are the errors you are experiencing? Maybe they can provide a clue.

Cheers,

Marcelo.

I have a nice 40x4 character LCD that would make a decent display, but I have not found any good way to automatically scroll the text up the way a serial terminal would. I might try writing a screen buffer for my TFT display.

I set up my UNO with a TFT display as a 40 column serial terminal. It works pretty well, but I think CP/M is in 80 column mode. Can this be changed?

Having CP/M run on 40 columns is possible, but tricky.

Some application work better (if at all) if you have a vt100 (or similar serial terminal) emulation.

The most common were the vt100 (ansi) and the adm3a.

I was trying to see how portable I could make it with what I have, but I think the real solution would be to either build/buy a vt100 terminal board or just not use serial and emulate a display controller with the DUE. I don't know how easy emulating a display would be. I've seen it done with a 6502 emulator, but I don't know how CP/M interacts with display controllers.

Just think serial. CP/M machines were (almost all of them) based on serial monitors. The machines which had their own displays and ran CP/M, did so through some sort of terminal emulation. So you would have to implement, for example, a vt100 emulation (interpret all the ANSI character control sequences).

The source code of such emulation could be easily (or maybe not so easily) adapted from any open source terminal emulator.

I recommend vt100 (ANSI) because this was the terminal type to which almost all of the CP/M programs had support for.

The Parallax Propeller chip would be a good fit as a display driver then. It is used a lot for retro computing projects and there is vt100 emulation code for both VGA and composite out. It would add components and cost though, so I might try finding a vt100 parser for Arduino.

I have found this. Seems cool, didn't have a chance to check it yet though: http://www.microvga.com/

I found this:

https://github.com/mkschreder/avr-vt100

Also, a Raspberry Pi computer and TFT makes a perfect terminal, but it's a bit over powered.

I got CPMDuino working pretty well with a PS/2 keyboard on a DUE. I'm thinking of making a classic computer clone with a built in keyboard and a video output.

That is pretty cool. I am interested on seeing the PS2 keyboard adaptation.

There should be still plenty of flash on it to hold a VGA output.

Here is the adapted code: https://codebender.cc/sketch:72128

Here is the code adapted to use a USB keyboard with the DUE's USB host: https://codebender.cc/sketch:72138

Cooool!!

Still some memory/resource for VGA?

http://stimmer.github.io/DueVGA/

It would be perfect!

I don't know how big this VGA lib would get. But it would definitely be cool to have VGA/Keyboard on CPMDuino.

Not sure if I am feeling brave enough to do the adaptation though, lol.

I am not able to download a copy of your git repo.

HI, I am not sure if I did set up the git repo. Not sure if sourceforge should do it automagically, but you can download the files from the files page directly (unfortunately one by one).

I will check the GIT mode to see if I can make it work. It is definitely a more practical approach.

Nice project! How fast is the emulated Z80 in the Arduino Due? Is it up to 1MHz?

Hi YH, I didn't have a change to chrono it, but it is pretty fast. I have been using many CP/M applications on it, and things like Wordstar and dBaseII for example are running pretty fast.

Unfortunately I don't have an application that I could chrono side by side with a physical CP/M machine (in fact I don't even have a physical CP/M machine).

If someone had an application that takes xxx seconds to execute on a real 4Mhz Z80 we could run it on the DUE and time it.