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From: "Alexei A. Frounze" <alexfru AT chat DOT ru>
Newsgroups: comp.os.msdos.djgpp
References: <IdSdnetZN8s4E-rYnZ2dnUVZ_oKdnZ2d AT comcast DOT com> <7705c9030612062113w33ba2a27u579dd96deacedd75 AT mail DOT gmail DOT com>
Subject: Re: DJGPP and Vista/64-bit
Date: Wed, 6 Dec 2006 23:56:42 -0800
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

They can't for two reasons:
- there's no any kind of DOS, which they need for all I/O
- they start as 16-bit DOS apps anyway and only after that switch to 32-bit 
mode

I guess the only way to go would be to do the following:
- build DJGPP as win32 apps so it can run under windows (maybe just like 
Open Watcom -- it essentially has 2 toolsets)
- (cross-)compile code for DOS, so that the DOS applications can still be 
compiled, even though can't always be executed
- provide source-level compatibility (where possible) so that some DOS 
applications can be compiled into functionally (nearly-)identical win32 
apps -- everything that explicitly deals with DOS interrupts and special 
memory locations (BIOS data area) will have to go. Some things (like console 
I/O) will probably be possible. I wonder if it's possible to make a few 
functions so that the direct graphical output (either to a window or to the 
entire screen) just like in DOS...

Alex

Blair Campbell wrote:
> Hey yeah, are 32-bit DOS apps able to run under 64-bit Windows?  I
> know 16-bit apps can't.
>
> On 12/6/06, Alexei A. Frounze <alexfru AT chat DOT ru> wrote:
>> So, what's the DJGPP's future under Vista and 64-bit Windows?
>>
>> Alex