DOS APPS

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Brian

I know that you are all going to start laughing... but does vista run
Clipper DOS apps? We are still running these apps and I need to know if
they are going to work?


Thanks,
Brian
 
Brian

"generally speaking" .. yes 16 bit apps will run .. (eg Clipper, FoxPro ) ..
but you will NOT be able to toggle to 'full screen'... have to run in a
window.

Rick Lipkin
SC Dept of Health, USA
 
Rick Lipkin said:
Brian

"generally speaking" .. yes 16 bit apps will run .. (eg Clipper, FoxPro )
.. but you will NOT be able to toggle to 'full screen'... have to run in a
window.

Rick Lipkin
SC Dept of Health, USA

Unless run under the now free Virtual PC I guess?

JW
 
Colin Barnhorst said:
Why not? Running in VPC makes no difference.

I don't understand this. If the VirtualPC has MS-DOS 6.22 installed, why
can't you run at full screen?

ss.
 
16bit apps cannot run on any x64bit OS. They can run in a vm on VPC because
the virtualized cpu is 32bit regardless of the host's cpu. The full screen
issue comes up from time to time in microsoft.public.virtualpc but I don't
recall the explanation of the relationship between directx, Vista, and VPC
that is involved. Ask over in the vpc group.
 
To run VPC at full screen, you will require a lot of grunt, both cpu and
memory. A minimum 1Gig of ram.
stevek
 
I know that you are all going to start laughing... but does vista run
Clipper DOS apps? We are still running these apps and I need to know if
they are going to work?


Thanks,
Brian

You will find out when you actually try it.

How big is your business? If it's not very big, one sure way you can do
it is with networked DOS machines and KVM switches. Many will cringe at
the thought of using hardware to solve this problem, but you
can use machines that would otherwise be trash, and you can fine-tune
the environment to suit your specific programs. A virtual
environment depends on the big daddy OS to behave.

Charlie
 
Synapse Syndrome said:
I don't understand this. If the VirtualPC has MS-DOS 6.22 installed, why
can't you run at full screen?

ss.

Yes, that's what I was getting at. Perhaps I didn't explain it very well.

JW
 
In message <[email protected]> "Colin Barnhorst"
16bit apps cannot run on any x64bit OS.
Thanks.

They can run in a vm on VPC because
the virtualized cpu is 32bit regardless of the host's cpu.

Yup, understood.
The full screen
issue comes up from time to time in microsoft.public.virtualpc but I don't
recall the explanation of the relationship between directx, Vista, and VPC
that is involved. Ask over in the vpc group.

I'm not worried about full screen, just have one 16-bit app I still run.
I can get it recompiled, but the development team is swamped, so I'll
just virtualize it.

I actually have a couple other apps that are reportedly temperamental in
64-bit, which is my primary reason for switching, I want to get the
proper bug reports filed, and I can live in a VM the rest of the time.
 
In message <WjFrh.78719$%[email protected]> Charlie Wilkes
You will find out when you actually try it.

How big is your business? If it's not very big, one sure way you can do
it is with networked DOS machines and KVM switches. Many will cringe at
the thought of using hardware to solve this problem, but you
can use machines that would otherwise be trash, and you can fine-tune
the environment to suit your specific programs. A virtual
environment depends on the big daddy OS to behave.

Ouch. That sounds a lot more costly then virtualizing, and virtualizing
a small DOS machine will be far less temperamental then simply running
the DOS app under a Win32 environment.
 
In message <WjFrh.78719$%[email protected]> Charlie Wilkes


Ouch. That sounds a lot more costly then virtualizing, and virtualizing
a small DOS machine will be far less temperamental then simply running
the DOS app under a Win32 environment.

It would be both more costly and prohibitively clunky for anything but a
small office. My conjecture is that the OP owns or works for a small
business, because who else still uses DOS commercially outside of the
device market?

For a small office in which only a few people use the DOS programs, the
main cost would be the KVM switch and some incremental electricity. By
using a KVM switch, the user can toggle back and forth, and thus would not
be running in a (flaky???) virtual environment, or a Win32 environment,
but a real DOS environment. Underpinning this arrangement would be a
network connection so the files on the DOS machine(s) can be read and
accessed within the Windows machines.

I have done this at home. I still like to use NeoPaint, and my experience
with virtual environments is (1) I can only work in a small window
and (2) they dog the CPU.

Maybe Windows Vista will turn out to be a practical and stable host for
legacy Clipper DOS apps in a virtual environment... but, how much does
anyone want to bet on that?

Charlie
 
Brian

Clipper DOS apps ( for the most part ) run fine in Vista RTM 32 bit ..
tested and confirmed myself .. however, I have not been able to get a
Clipper app to run in full screen .. not supported. Vista 64 does not
support 16 bit apps period.

The xHarbour ( www.xHarbour.org ) project is a truly backward 32 bit
compatable ( clipper ) compiler, pre-processor and is Open Source and free
... I have virtually taken Clipper 5.2 code and ported to a xHarbour\Borland
5.5 C++ console app without changing very much code at all.

Rick Lipkin
SC Dept of Health, USA
 
The xHarbour ( www.xHarbour.org ) project is a truly backward 32 bit
compatable ( clipper ) compiler, pre-processor and is Open Source and free
.. I have virtually taken Clipper 5.2 code and ported to a
xHarbour\Borland 5.5 C++ console app without changing very much code at
all.

Rick Lipkin
SC Dept of Health, USA

Free unless you want to be legal. Then it costs $145 for the personal
version,
$395 for the professional version and for documentation that consists of
more than
Lorem Ipsem filler it costs $49.00 for the manual as well. It's not legal
to
use the free demo for production work.

Tom Lake

Tom Lake
 
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