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  • Author Author: marcelodantas
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Running CP/M (yes, the 80's operating system) on the Arduino DUE

marcelodantas

Hi everyone,

 

I have succeeded running (to some extent) CP/M 2.2 on the Arduino DUE, using code from my project at http://runcpm.blogspot.com/

Now I am stuck at the file system part of the project. I am having a hard time dealing with the SD card routines. I am fairly new to the Arduino environment, and debugging is not a strong point of their IDE, so maybe someone wants to help me out?

I would gladly share the source code to anyone willing to provide some guidance.

The Z80 emulation already works fine, and some applications like mbasic are loading and running fine (technically I am already running Microsoft's mbasic on an Arduino), but obviously, when any disk access is needed, things go deeply South.

 

Any help is much appreciated.

Cheers,

Marcelo.

  • in reply to Former Member

    Hi Denis,

     

    Sorry for taking so long to reply.

    Seems that the version of the library you have doesn't match the one I have.

    I will check the project and see what's there, it has been a long time since I touched those sources.

    In the meantime, and if you read this message, please get in touch with me on my gmail account ... marcelo.f.dantas ...

    I am not visiting this forum as often as I would like to, so going through my gmail would be a better way of getting in touch.

    Let's make CPMDuino work on your DUE.

     

    Cheers,

    Marcelo.

  • Hi,

    Sorry if i write to you, but i have a question about running CPM on the Arduino DUE.

    I downloaded all the files on GitHub, and i use ide 1.5.2 with the SDfat library, but the compile returns this error: class SdFile has no member named getFilename.

    Is the worth library ? Can you send me the lib please?

     

    Sorry for this, but i really want to run CPM on my DUE... I also made the Grant Searle CPM Z80 machine, and works fine, so i'd like to put them together and see the difference.

     

    Thanks for all

     

    Denis (from Italy)

  • in reply to DAB

    Hi DAB,

     

    All the CP/M stuff is working, this is based on my other project, RunCPM (http://www.sourceforge.net/projects/runcpm/), it is the Arduino part that is giving me a headache.

    So far most of it is working, I just need to fix some quirk on the directory manipulation routines.

    Other than that, if you feel like running Microsoft Basic 80 again, please give it a try. And let me know how it goes.

    To build and run it needs the SdFat library, and a shield with a SD card.

    It will run on the Arduino DUE, as it is the only I could find with enough RAM to hold the emulation, but the code could be easily adapted to use external RAM as well.

     

    Keep in touch.

     

    Cheers,

    Marcelo.

  • in reply to amgalbu

    Awesome!

    I have fixed most of the issues and uploaded the source code to Sourceforge (http://sourceforge.net/projects/cpmduino).

    If you have an Arduino DUE with SD card shield you can download it and give it a try.

     

    Cheers,

    Marcelo.

  • Hi Marcelo,

     

    Using CPM takes me back a few decades.

    First, the file format is very different for CPM than the current formats used for today's storage devices.

     

    Do you have any references for the CPM format?

    I will look in my library, but I am not sure I have anything on the format, but I will look.

     

    I do remember that there were a number of disk controller chips used in those days, which could also make many different formats.

     

    There used to be a couple of CPM websites, but again, I have not looked for such things for a lot of years.

     

    DAB