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Date:	Sun, 01 Apr 2007 22:25:16 -0700
From:	Jim Michaels <NOSPAMFOR-jmichae3- AT yahoo DOT com>
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Subject:	Re: cwsdpmi "protected mode not availible" on win2k, stub don't work
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Gerrit van Niekerk wrote:
> On 31 Mar 2007 at 11:30, Jim Michaels wrote:
> 
>> I get "Protected mode not avcailible" when I run my app under Windows 
>> 2000 consistently, whether I include the stub or whether I have the 
>> cwsdpmi.exe alongside it.
>>
>> Without these it just says "cwsdpmi not found".
>> Something always goes wrong.
>>
>> gxx whatever.c
>> (which generates a.out & a.exe)
>> exe2coff a.exe
>> (which generates a)
>> copy /b f:\djgpp\2.03\v2misc\bin\cwsdstub.exe+a whatever.exe
>> (which generates whatever.exe)
>>
>> and "availible" is misspelled.
>>
>> tried this with CMD.exe shell and with command.com.
>>
>> If it's of any interest, this computer was made for Windows 98, before 
>> ACPI-compliant power supplies were made, so it must be turned off manually.
>> I saw the earlier post about ACPI and CWSDPMI having a problem with 
>> windows, but I wasn't quite sure what to make of it in the end.
> 
> Windows 2000 has it's own DPMI support - you should not use CWSDPMI 
> at all. 

I'm using only the latest binaries from the 2.03 compiler set of DJGPP.

I'm looking at the generated EXE code by gxx and gcc and they both have 
this at the top close to somewhere after the MZ signature of a standard EXE:

stub.h generated from stub.asm by djasm, on Mon Dec 24 21:21:52 2001
The STUB.EXE stub loader is Copyright (C) 1993-1995 DJ Delorie.
Permission granted to use for any purpose provided this copyright
remains present and unmodified.
This only applies to the stub, and not necessarily the whole program.

$Id: stub.asm built 12/24/01 21:21:52 by djasm $

@(#) stub.asm built 12/24/01 21:21:52 by djasm
go32stub, v 2.02T
              @                    CWSDPMI.EXE

followed by a section of binary.
I don't know how not to get it not to do the stub.h (or do I need it?) 
Does it necessarily call *any* DPMI services or only CWSDPMI?
in any case, I can't get either to work.

The application calls BIOS.H's biosdisk():
under windows XP the application causes Windows to throw the message:
16-bit MSDOS Subsystem:
An application has attempted to directly access the hard disk, which 
cannot be supported.  This may cause the application to function 
incorrectly.  Choose "Close" to terminate the application.
If I choose Ignore, the biosdisk calls apparently are ignored and the 
buffers I get back are full of uninitialized memory stuff (which is what 
gets written to disk with fwrite) which should have been written to.

this is another hump DJGPP may need to get over.  within the "Windows NT 
resource Kit" is a Disk Editor tool.  you can hex-edit your hard drive. 
  I didn't think that was possible given the existing API's I saw 
exposed in Visual C++ and the Platform SDK.  but there's probably 
something in the kernel or a trick to getting directly at the IO device. 
  I need to read the boot & partition sectors.

AHA!  you are right!  my autoexec.nt in the windows 2000 machine has 
been compromised.  it has 1 line: "Prompt $P$G".  some offending 
installer did that a while back.  I think it was an old HP Printer Driver.

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