NTVDM error on 16-bit DOS in Windows XP

Discussion in 'Parallels Desktop for Mac' started by cristi_varu, Mar 27, 2007.

  1. cristi_varu

    cristi_varu Bit poster

    Messages:
    3
    Hello

    I switched to the Mac because there is Parrallels, wouldn't have done it otherwise, for fear that there would be a PC program that I can't run.

    Now I try to run my favourite, old-fashioned game and it happens to be 16-bit DOS.

    I get an error from the 16-bit MS-DOS subsystem:
    The NTVDM CPU has encountered an illegal instruction.
    CS: 383f IP: 8759 OP: fe 95 02 19 27 Choose "Close" to terminate the application

    Choosing "Ignore" does not help.

    I was able to run this program on windows XP with no problems on real PCs.

    Thanks for any help,

    Cristian
     

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  2. Eru Ithildur

    Eru Ithildur Forum Maven

    Messages:
    1,954
    Have you set the properties to run it as MS-DOS?
     
  3. cristi_varu

    cristi_varu Bit poster

    Messages:
    3
    Many thanks for your answer!

    I wonder: properties of what (file? virtual machine?), and how can i set them?

    Thanks a lot,

    Cristian
     
  4. Eru Ithildur

    Eru Ithildur Forum Maven

    Messages:
    1,954
    Sorry, that was REALLY vague. Properties meaning right click on the program and set how it is to be run...
     
  5. cristi_varu

    cristi_varu Bit poster

    Messages:
    3
    Tried that, the Program tab already shows it as an MSDOS program. Changing the properties in all sorts of ways didn't help at all.

    Thank you anyway for your help.

    Cristian
     
  6. Eru Ithildur

    Eru Ithildur Forum Maven

    Messages:
    1,954
    Strange... I guess you will need the Parallels team to take a look. Doesn't sound like a simple setting or anything.
     
  7. STim

    STim Bit poster

    Messages:
    942
    Christian,

    Here's what you need to do:
    1. Shut down your VM.
    2. Go to Edit->Virtual Machine...
    3. In left pane select "Options"
    4. In right pane select Advanced and deselect the "Enable Intel VT-x support" checkbox.

    After that, start your VM and check if things got better.
     
  8. Eru Ithildur

    Eru Ithildur Forum Maven

    Messages:
    1,954
    *laughs* I just realized something... This is off topic, but it is funny. My real name is Christian, and I saw the e-mail with your instructions and I was trying to figure it out... Now it makes sense.
     

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