gmane.linux.msdos.dosemu.devel

Re: Switching floppy disk images

Stas Sergeev — 2013-04-14T16:05:21

14.04.2013 19:54, Julius Schwartzenberg пишет:
I opened a ticket for you already:
http://sourceforge.net/p/dosemu/patches/117/
The patch there is slightly different, maybe it works.

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Re: Switching floppy disk images

Julius Schwartzenberg — 2013-04-14T15:54:06

Thanks a lot for the quick response and the patch!! I couldn't try the 
patch till now unfortunately, but it doesn't seem to work yet. I tried 
to point DOSEMU to a symlink and switch its destination while DOSEMU is 
running, but it still reads the original disk then.

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Re: Switching floppy disk images

Stas Sergeev — 2013-04-09T20:25:01

09.04.2013 23:29, Julius Schwartzenberg пишет:
I think its not implemented.
The attached completely untested patch
maybe does something like what you need.
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Switching floppy disk images

Julius Schwartzenberg — 2013-04-09T19:29:08

Hi,

Maybe I missed it, but I haven't been able to find out how to switch 
floppy images while DOSEMU is running.

Since most computers nowadays ship without floppy drives, I guess using 
floppy images with DOSEMU is more common practice now than it was 
originally. If this feature doesn't exist yet, would it be doable to add it?

Is it already possible to switch floppy images while DOSEMU is running 
or could I open a feature request?

Thanks,
Julius

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Re: Running GRUB4DOS

Julius Schwartzenberg — 2013-03-27T19:20:06

I hadn't expected it, but when I just run the executable in DOSBox, it
actually seems to work! It displays the GRUB4DOS menu, here is a screenshot:

https://lh6.googleusercontent.com/--Neu3G5wLME/UVNFDvl0wmI/AAAAAAAABr8/JE_4sjV87iI/s646/GRUB4DOS_in_DOSBox.png

I guess this means I should report it?

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Re: Running GRUB4DOS

Stas Sergeev — 2013-03-27T05:07:03

27.03.2013 01:41, Julius Schwartzenberg пишет:
Run with dosbox, compare the results.

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Re: Running GRUB4DOS

Julius Schwartzenberg — 2013-03-26T21:41:38

Hi Eric,

Eric Auer wrote:

Actually, I just ran the grub.exe executable that's included from a Dos
prompt. I guess it's even meant to be called though a DEVICE= line in
config.sys instead.

I do have an image file attached, but I wonder whether Dosemu would
actually look at the MBR when booting from it. In my experimenting I was
just trying to see whether I could run GRUB4DOS through Dos in Dosemu.



I wish I would know a bit more about these things, but I'm not really
sure how I could investigate this myself. I see that different $_cpu_emu
settings all give the exact same behavior.
I hope an expert can at least tell me whether these things below in the
bug tracker or whether such a crash is intended.

Thanks!
Julius

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Re: Running GRUB4DOS

Eric Auer — 2013-03-26T18:38:23

Hi Julius,


In which context? Did you try to install GRUB on the MBR
of some diskimage-based drive? Note that redirect-drives
(where your DOS disk contains the files of some directory
in Linux) behave more like network drives for DOS, they
thus give at most a bit of FAT drive / MBR disk feeling.


It is interesting that 386-specific things like high half of
EAX, EBX, ESI are active and FS and GS in use here and that
your "EIP" (CS:EIP) is in 0000:..., might be half of a null
pointer or something related to attempting a mode switch?


Apparently your crash happened when you tried to execute an
area of memory which is first empty (00s are valid code) and
then is not (ffs are not valid code). That would again bias
my suspicions towards null pointers, but 5f82 is a lot and
GRUB is related to booting, so it may also have been trying
to set up something in the first 64 kB of RAM deliberately.


I leave further analysis to the real experts, but maybe you
can give more details about which steps brought you to the

Re: dosemu over an ssh session

Julius Schwartzenberg — 2013-03-25T22:30:43

Dosemu works fine over SSH with just text applications, but it's not
possible to run graphical games or other applications without either X11
or direct VGA access.

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Running GRUB4DOS

Julius Schwartzenberg — 2013-03-25T22:27:58

I'm not sure whether all crash bugs are really bugs or whether it is
sometimes intended. When I run GRUB4DOS (version 0.4.5c), current GIT
crashes with the following output:
ERROR: unexpected CPU exception 0x0d err=0x00000000 cr2=00000000 while
in vm86 (DOS)
Program=sigsegv.c, Line=193
EIP: 0000:00005f82 ESP: 256e:00000bee  VFLAGS(b): 00000 00111010 10000110
EAX: 0040de00 EBX: 0002ace0 ECX: 00000000 EDX: 00000000 VFLAGS(h): 00003a86
ESI: 000c4000 EDI: 00001000 EBP: 0000091e DS: 256e ES: c400 FS: 2540 GS:
2024
FLAGS: PF SF IF OF RF VM VIF  IOPL: 3
STACK: 01 58 72 c9 8b 74 30 01 de 89 -> 75 06 80 0d 04 f6 05 02 74 03
OPS  : 00 00 00 00 00 00 00 00 00 ff -> ff ff ff ff ff 02 00 00 00 00
        ff                  0000:5f82 db FF

I can imagine that this is not really intended to work however, but I
would expect something other than just a crash in this case.

Should I report such things in the bugtracker as well or is this just
intended behavior?

Thanks!
Julius

-----------------------------------------------

Re: dosemu over an ssh session

solarflow99 — 2013-03-12T00:05:15

I mean without X11 at all.



On Mon, Mar 11, 2013 at 4:59 PM, Stas Sergeev <stsp< at >list.ru> wrote:

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Re: dosemu over an ssh session

Stas Sergeev — 2013-03-11T20:59:24

12.03.2013 00:34, solarflow99 пишет:
Try ssh -X

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dosemu over an ssh session

solarflow99 — 2013-03-11T20:34:29

I just had this question in case anyone has had success running games
and other programs this way?

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Re: Different problems with different cpu_emusettings

Stas Sergeev — 2013-03-11T20:23:10

11.03.2013 23:56, Julius Schwartzenberg пишет:
It isn't.

Would be nice if you add where did the thing broke.
You need to use "git bisect" and find out the bad commit.
The regressions are quickly fixed.

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Re: Different problems with different cpu_emusettings

Julius Schwartzenberg — 2013-03-11T19:56:06

Thank you very much for your quick response!!

Stas Sergeev wrote:

Alright, if there is a chance my issues are actually fixed in the devel
branch, maybe I should actually test with that instead?



I just created two issues:
https://sourceforge.net/p/dosemu/bugs/474/
https://sourceforge.net/p/dosemu/bugs/475/

I will try to test more and create bugs reports when I run into
problems. Please let me know if I can provide more info to help solve
these issues.

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Re: Different problems with different cpu_emusettings

Stas Sergeev — 2013-03-10T19:07:20

10.03.2013 22:48, Julius Schwartzenberg пишет:
Testing against git is the most important thing in every
project. If you by chance report a bug that is already
known or already worked on, this is not a big problem
at all, compared to the importance of testing git. And it
is not very likely to happen, esp if you test "master" branch.
Now we have "devel" branch for unstable things, and before
that I was creating a separate branches for every new
sub-project. People usually refrain from committing the
unstable things to master, so master is always "stable enough"
for doing some public testing. And if it is not, then we'd need
to fix ourselves, not our testers. :)
At this point of time, however, "devel" should be stable
enough for public testing too. I guess Bart is afraid of merging
it simply because no one tested it for regressions.

Yes but no one will look it up in an ML archieve a month later.
Note that I haven't analized your particular problem. This is
just a janitorial task of reminding people to ope

Re: Different problems with different cpu_emusettings

Julius Schwartzenberg — 2013-03-10T18:48:07

No not yet, I wasn't sure whether I should do this for the current GIT
as well. Is the current version in GIT indeed considered to be stable
enough for testing? Should I report both issues separately?

Just in case, my initial e-mail should contain enough information to
reproduce both problems if I didn't forget anything.

Thanks,
Julius

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Re: Different problems with different cpu_emusettings

Stas Sergeev — 2013-03-09T06:48:58

09.03.2013 02:52, Julius Schwartzenberg пишет:
Have you already filled the bug report with all the
needed attachments to reproduce the problem?

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Re: Different problems with different cpu_emusettings

Julius Schwartzenberg — 2013-03-08T22:52:47

I saw there were more updates in GIT. I tested again, but it's not
working yet.

Julius

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Re: [Dosemu-cvs] [SCM] dosemu branch devel updated.dosemu-1.4.0.8-176-g1fa232b

Stas Sergeev — 2013-02-20T09:45:53

20.02.2013 06:32, Bart Oldeman пишет:
Great, lets merge it to master then.
But the console switching code (esp the threaded memcpy)
and the new OPL code needs testing & ACKs.
In particular, I wonder why chocolate-doom went through all
the troubles of porting dbopl, if they could instead simply take
adlibemu.c, which _seemingly_ works much better. I don't have
an answer to that, but there could have been some reason.

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Re: [Dosemu-cvs] [SCM] dosemu branch devel updated.dosemu-1.4.0.8-175-g490ef33

Stas Sergeev — 2013-02-19T13:34:10

18.02.2013 06:07, Bart Oldeman пишет:
But devel needs a separate autoreconf (or autoconf) now.
I changed configure.in some time ago.

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