Re: please explain to me why dosemu doesn't do this or that...

Re: please explain to me why dosemu doesn't do this or that...

[Stas Sergeev]

Hello.

Justin Zygmont wrote:
> If we could get all the
> patches, etc in the next release, that would be excellent.
What patches do you want to see in? The fact is
that some patches are judged based on a users
feedbacks, so don't hesitate to name your
favourite ones (and the hated ones, if any).

Re: please explain to me why dosemu doesn't do this or that...

[Justin Zygmont]

dpmi_sti4.diff is the one for the sound patch if I remember correctly,
that one would be great.  I remember hearing about the fact that there
were some DPMI issues to be resolved before it could be included in the
main tree?


On Sat, 21 Sep 2002, Stas Sergeev wrote:

> Hello.
>
> Justin Zygmont wrote:
> > If we could get all the
> > patches, etc in the next release, that would be excellent.
> What patches do you want to see in? The fact is
> that some patches are judged based on a users
> feedbacks, so don't hesitate to name your
> favourite ones (and the hated ones, if any).
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-msdos" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Re: please explain to me why video/bios shadowing must be disabled to use graphics...

[Bart Oldeman]

1st note: you do not need to (and never needed to) disable shadowing if
you use graphics in xdosemu, which is quite usable nowadays, but in
certain cases too slow, for some graphical programs not perfect and not
full screen (your apps run in the "DOS in the BOX").

Only on the linux console, IF your graphics card is supported by DOSEMU
and IF you run DOSEMU as root or suid-root you *might* need to have to
turn off vbios shadowing. There are quite a few graphics cards out there
that DOSEMU does not support, and moreover suid-root is discouraged.

On Fri, 20 Sep 2002 matt@snip.net wrote:

> Why was it programmed this way? 

Nothing really intended - DOSEMU basically mmaps the contents of
/dev/mem to 0xc0000-0xc8000 or some such, if it has permission to do so.
Otherwise console graphics don't work.

> Why does one have to disable video/bios shadowing? 

I guess because the RAM that is used for the shadowing at boot time 
might be overwritten by Linux and things get messed up. This is highly
system dependent; that's why I said *might*.

> Is this the only programming solution that had to be done or could there have also 
> been another way that probably would've been a lot more challenging to 
> implement but would've allowed people to run there graphical games without 
> any requirements to disable video/bios shadowing in the first place? 

yes, that's called "vgaemu" and is what you use when you run graphical 
applications in xdosemu - no need for a graphics card specific video
BIOS, so shadowing is irrelevant.

simply run them in xdosemu or wait for "vgaemu on console or fullscreen 
X" support, that does not need the systems BIOS or root privileges.

Bart

please explain to me why dosemu doesn't do this or that...

[Oscar A. Valdez]

I just thought I'd drop a little note to Bart and the other people on
the dosemu team to let them know, that despite all that we complain
about dosemu, I think it's a terrific program that does what it does
remarkably well, and that I greatly  appreciate the time and
thoughtfulness they dedicate to answering our sometimes rude messages on
this list.
--- 
Oscar A. Valdez

Re: please explain to me why dosemu doesn't do this or that...

[matt]

I hope my message was never seen as being *rude* because that's not what I 
intended. I wasn't asking why it didn't do this or that but was just 
wondering why disabling video/bios shadowing was sometimes necessary.

At 04:36 PM 9/20/02 -0600, you wrote:
>I just thought I'd drop a little note to Bart and the other people on
>the dosemu team to let them know, that despite all that we complain
>about dosemu, I think it's a terrific program that does what it does
>remarkably well, and that I greatly  appreciate the time and
>thoughtfulness they dedicate to answering our sometimes rude messages on
>this list.
>---
>Oscar A. Valdez
>
>
>
>-
>To unsubscribe from this list: send the line "unsubscribe linux-msdos" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: please explain to me why dosemu doesn't do this or that...

[Justin Zygmont]

yes, it is excellent, i've used it for years.  If we could get all the
patches, etc in the next release, that would be excellent.


On 20 Sep 2002, Oscar A. Valdez wrote:

> I just thought I'd drop a little note to Bart and the other people on
> the dosemu team to let them know, that despite all that we complain
> about dosemu, I think it's a terrific program that does what it does
> remarkably well, and that I greatly  appreciate the time and
> thoughtfulness they dedicate to answering our sometimes rude messages on
> this list.
> ---
> Oscar A. Valdez
>
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-msdos" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>