Legacy Phar Lap Applications in DOS

Discussion in 'Virtual PC' started by Jeff_K, May 2, 2006.

  1. Jeff_K

    Jeff_K Guest

    We're trying to run a legacy appliation that uses Phar Lap's 286 DOS
    extender. The application will throw an exception 14 immediately on startup,
    and dies with a register dump. Our application does not do this under either
    VMware for DOSbox.

    We *HAVE* to use Virtual PC for Windows because of the three emulators we've
    tested, it's the only one that emulates Serial I/O correctly!

    We're using Ms-dos 6.22, under Virtual PC ver. 5.3.582.27, with no memory
    management other than HIMEM.SYS. We get the same symptom under EMM386.EXE,
    and QEMM ver 7.

    Also, we've found that we can't use VMADD386.EXE because it totally mucks up
    QEMM 7 (we need that to allow us to use the DOS networking and *still* have
    enough memory for our application!).

    Any suggestions would be appreciated . . .

    Jeff_K, May 2, 2006
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  2. Can you send me a message through my blog?
    Benjamin Armstrong
    Virtual machine Program Manager

    This posting is provided "AS IS" with no warranties, and confers no rights.
    You assume all risk for your use.
    Ben Armstrong [MSFT], May 3, 2006
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