gmane.linux.msdos.dosemu.devel

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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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

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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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Different problems with different cpu_emu settings

Julius Schwartzenberg — 2013-02-17T18:33:05

Doing some simple testing with Dosemu, I discovered these issues with
the current version from GIT.

When setting $_cpu_emu to "fullsim" or "vm86sim", I cannot perform a
"sys a: c:" when using a Windows 95 bootdisk and a harddisk image for
c:. I get this message then "No room for system on destination disk".
(There is more than enough disk space.)
With $_cpu_emu set to "vm86" or "full" it works correctly.

I also have set up Dosemu to use my DVD-ROM device directly together
with MSCDEX. This works on the contrary only with $_cpu_emu set to
either "fullsim" or "vm86sim".
When I use "vm86" or "full", and try to access the inserted disk, I do
hear the disk spin up, but then I get: "CDR101: Not read reading drive
P". Pressing F for fail multiple times results in an "Fail on INT 24"
message.

I'm using the Windows95a.img bootdisk from this page (with Dosemu's
cdrom.sys added):
http://www.allbootdisks.com/download/95.html

Are such problems known? Would this be an appropriate way to report them
(or would it be preferred to create a ticket)?

My specs:
Ubuntu 12.04 AMD64 with kernel 3.5.0-23-generic
x86-64 version of Dosemu
Intel Core2 Duo P9500, 4GB RAM (notebook)

Please let me know if there is anything I could do to help solve these
issues.

Thanks in advance!
Julius

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console and ssh

solarflow99 — 2013-01-30T15:02:05

This is a simple question, I was just wondering what is the preferred
method of running for the console was, I was trying to test some games
and other programs and most won't work unless i'm in an xterm:

dosemu -s -D9+Sc -f /etc/dosemu/dosemu.conf


Any changes needed for dosemu.conf for this?



Thanks,

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'ERROR: general protection at 0x70200: 0' ?

Frantisek Hanzlik — 2013-01-28T13:39:19

Help again,

I can start DOSEMU 1.4.0.8-112.g760339c in both xterm and console,
but when I then run program (it is only installer for any DOS
acoounting SW), then in xterm it run fine, but when I start it
in console or in xterm with '-t' switch, then I will get error:

DOSEMU 1.4.0.8 (2013-01-28), configured: 2013-01-28 10:21:14 +0100
Please test against a recent version before reporting bugs and problems.
Submit Bugs & Patches to linux-msdos-u79uwXL29TY76Z2rM5mHXA< at >public.gmane.org or via http://dosemu.org.
FreeDOS kernel build 2036 cvs [version Aug 18 2006 compiled Aug 18 2006]
Kernel compatibility 7.10 - WATCOMC - 80386 CPU required - FAT32 support

(C) Copyright 1995-2006 Pasquale J. Villani and The FreeDOS Project.
All Rights Reserved. This is free software and comes with ABSOLUTELY NO
WARRANTY; you can redistribute it and/or modify it under the terms of the
GNU General Public License as published by the Free Software Foundation;
either version 2, or (at your option) any later version.
C: HD1, Pri[ 1], CHS=    0-1-1, start=     0 MB, size=   392 MB
D: HD2, Pri[ 1], CHS=    0-1-1, start=     0 MB, size=   392 MB
E: HD3, Pri[ 1], CHS=    0-1-1, start=     0 MB, size=   392 MB
F: HD4, Pri[ 1], CHS=    0-1-1, start=     0 MB, size=   392 MB
dosemu XMS 3.0 driver installed.
dosemu EMS driver rev 0.5 installed.
Kernel: allocated 30 Diskbuffers = 15960 Bytes in HMA
Z: = LINUX\FS\ attrib = READ ONLY

FreeCom version 0.84-pre2 XMS_Swap [Aug 28 2006 00:29:00]
Sound on: SB at 0x220-0x22f, IRQ=5, DMA8=1, DMA16=5. MPU-401 at 0x330-0x331.
D: = LINUX\FS/HOME/HANZLIK attrib = READ/WRITE
"Welcome to dosemu 1.4.0.8!"
About to Execute : c:\u.bat
C:\>cd \ui
C:\ui>instal
ERROR: general protection at 0x70200: 0

boot.log (+a9 debug) start and tail is in attachment.

Can You please anyhow help with?
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undefined reference to `sb_mixer_register_write'

Frantisek Hanzlik — 2013-01-28T07:02:58

Hello DOSEMU hackers,

Just trying build git version DOSEMU (dosemu-1.4.0.8-111.g5205669 ?)
I ends with linker error:

...onous-unwind-tables -o emu.o emu.c
In file included from /usr/include/stdio.h:28:0,
                 from emu.c:59:
/usr/include/features.h:314:4: warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp]
gcc -std=gnu99 -Wl,-warn-common -Wl,-z,relro  -rdynamic -o ../1.4.0.8/bin/dosemu.bin emu.o \
   -Wl,--whole-archive lib/libenv_video.a lib/libbase.a lib/libbase_async.a lib/libarch_linux_async.a lib/libarch_linux_mapping.a lib/libbase_misc.a lib/libbase_misc_libpcl.a lib/libbase_dev_misc.a lib/libemu-i386.a lib/libenv.a lib/libbase_speaker.a lib/libbase_dev_pic.a
lib/libdosext_dpmi.a lib/libdosext_mfs.a lib/libdosext_misc.a lib/libbase_init.a lib/libbase_serial.a lib/libbase_mouse.a lib/libbase_dev_dma.a lib/libarch_linux_debugger.a lib/libdosext_net_net.a lib/libdosext_sound.a lib/libarch_linux_dosext_sound.a
lib/libbase_dev_sb16.a lib/libbase_sound.a lib/libdosext_drivers.a lib/libbase_bios.a lib/libplugin_fluidsynth.a lib/libplugin_X.a lib/libplugin_gpm.a lib/libplugin_extra_charsets.a lib/libplugin_alsa.a lib/libplugin_term.a lib/libplugin_midimisc.a lib/libplugin_sdl.a
lib/libplugin_kbd_unicode.a lib/libplugin_commands.a lib/libplugin_sndfile.a lib/libplugin_translate.a lib/libplugin_translate_charsets.a -Wl,--no-whole-archive -lvga -lrt  -ldl -lm
lib/libdosext_sound.a(sound.o): In function `sb_io_write':
/mnt/ARCHIV/dist/RH/MyRPMs/BUILD/dosemu-1.4.0.8/src/dosext/sound/sound.c:768: undefined reference to `sb_mixer_register_write'
collect2: error: ld returned 1 exit status
make[2]: *** [../1.4.0.8/bin/dosemu.bin] Error 1
make[2]: Leaving directory `/mnt/ARCHIV/dist/RH/MyRPMs/BUILD/dosemu-1.4.0.8/src'
make[1]: *** [dosemu] Error 2


Which may be bad?
I compile it at Fedora 17 i686, gcc 4.7.2, with options

--with-fdtarball=%{SOURCE1} --with-svgalib --target=i686 --with-gpm\
 --enable-debug --with-alsa --with-sndfile --with-x --with-slang\
 --with-target-cpu=i686 --disable-cpuemu --disable-aspi

Thanks, Franta Hanzlik


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Confirming that VGA fonts,mode mono underlining now work.

Edward Mendelson — 2013-01-23T15:04:11

A few months ago, I was asked whether a problem I had reported had been fixed ("second VGA font bank" was wrongly displayed with the bold attribute). I'd like to confirm that it has been fixed. Thank you!

I think I also reported that underline mode didn't work in mode mono; that now works too.

Thank you again for these excellent developments. I look forward to a full release!

Edward Mendelson
Contributing Editor
PC Magazine


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dos

solarflow99 — 2013-01-15T18:37:41

http://sourceforge.net/blog/potm-201301/

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latest devel build

solarflow99 — 2013-01-14T05:05:13

I was just wondering if anyone had any feedback about this problem I
noticed so I know if it should be released?  Isn't there a way to
disable sound so it will work?  Stas?


Thanks,

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dosemu error

solarflow99 — 2013-01-13T02:59:27

using the devel branch, I am getting this error:

# dosemu -s

Running as root in full feature mode
ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect:
Connection refused

ERROR: SDL sound init failed: No available audio device
ERROR: PCM: "Sound Output: SDL device" failed to open


Even if I disable sound with $_sound = 0  in /etc/dosemu.conf.  Its
true there is no sound device though, since this is a vmware host with
no sound device.

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excellent bug fix

solarflow99 — 2013-01-08T06:44:29

FYI, with your patch, I can get a successful build for Fedora 18.  nice...


http://comments.gmane.org/gmane.linux.msdos.dosemu.devel/130

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patch

solarflow99 — 2013-01-08T05:17:55

Hi, I did a git clone:  git clone git://git.code.sf.net/p/dosemu/code
dosemu-code
 and noticed the change wasn't in there, maybe this is why?


    status: open --> accepted
    milestone: --> Unstable_(example)


Thanks,

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patches

solarflow99 — 2013-01-06T04:27:05

hi Stas,


I was about to create a RPM release for F-18, and was wondering if you
had a chance to add at least 1 of my patches at this time?

http://sourceforge.net/p/dosemu/patches/100/
http://sourceforge.net/p/dosemu/patches/105/

The second one can wait, but the first one would be nice to have in
there.   I guess i'll take the latest snapshot out of GIT, which is
what I have been doing that all along.


Thanks,

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Bumping up required versions.

Bart Oldeman — 2012-12-19T17:19:59

Hello all,

I think before releasing 1.4.1 I should bump up this:

-> REQUIREMENTS for DOSEMU:
    - egcs >= 2.91.66 (1.1.2) / gcc >= 2.95.2
    - glibc >= 2.1.3
    - Linux >= 2.0.30, 2.x.y >= 2.1.27 (>= 2.4.20 recommended)
      2.6 kernels <= 2.6.5 can be problematic

this was last changed in 2003 to correspond to RHEL 6.2 (released
March 2000, with kernel 2.2.14). This combination certainly doesn't
work anymore, with clock_gettime() instead of gettimeofday() and some
C99 code.

I can bump to kernel 2.6.9/glibc 2.3.4/gcc 3.4 (RHEL4). RHEL4,
released February 2005 is on "Extended Life Cycle Support (ELS)", for
customers that pay RH extra. I'm not sure why anyone would want to run
a new dosemu on an old RHEL4 server but it just happens to be the
oldest one still receiving some support (until Feb 2015).

The next enterprise distro still in use is SLES10 (Jul 2006), kernel
2.6.16.xx, gcc 4.1, glibc 2.4. There is no code in dosemu that (via
configure or runtime checks) depends on anything newer than kernel
2.6.15, or gcc 3.4.

Bart

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fluidsynth plugin is ready

Stas Sergeev — 2012-12-01T13:01:30

Hi, I implemented the fluidsynth plugin and it seems
to work very well.

Bart, could you please merge it to master?
I'd like to do that myself, but not for autoreconf.

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SF project upgrade

Bart Oldeman — 2012-11-02T12:29:37

Hi,

I scheduled an upgrade for the sourceforge pages. I helps us because
the new bug tracker has a lot more functionality and it's easier to
cross reference (see e.g. Bochs at sf.net/projects/bochs). I'll
probably have to adjust a few links and git email notification so I'll
follow up when it's done.

Bart

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compile error "conflicting types for ‘yyget_leng’"

Hanno Böck — 2012-10-14T14:40:35

Hello,

With latest dosemu git code, I get a compile error.



gcc -c -MP -MMD -I../../../src/include
-I../../../src/plugin/include  -DYYPURE -I. -Wall -Wstrict-prototypes
-Wmissing-declarations -Wnested-externs  -fno-strict-aliasing -pipe -O2
-fomit-frame-pointer -o lex.yy.o lex.yy.c lex.yy.c:2056:11: error:
conflicting types for ‘yyget_leng’ In file included from lexer.l:58:0:
lexer.h:39:12: note: previous declaration of ‘yyget_leng’ was here
lex.yy.c:5027:11: error: conflicting types for ‘yyget_leng’ In file
included from lexer.l:58:0: lexer.h:39:12: note: previous declaration
of ‘yyget_leng’ was here


It seems that the declaration of yyget_leng is doubled. I can fix the
error for me with the attached patch, though I don't know what exactly
causes this and if it has side effects. Can anyone look into this?

cu,

coopthreads is stable

Stas Sergeev — 2012-09-09T11:23:32

OK, I've got the thing stabilized.
All the regressions I was aware of, are fixed.

Some Q&As:

Q: What does it do?
A: Nothing but to allow to sleep inside dosemu
code while the DOS code is still running (in another thread).

Q: Any synchronization issues?
A: Nope, cooperative threading is synchronous.

Q: What is it useful for?
A: The primary targets were fossil's wait for char, int16's wait
for keypress, and do_call_back(). I wasn't looking for more;
there are probably still the candidates available. And when
moving bios.S parts to C code, this is a very handy capability.

Q: So... only 3 users?
A: Well but do_call_back() is used in a lot of places, so a lot
of code now uses coopthreads indirectly.

Q: Is it clean?
A: It is clean because it is small (~11K of source), only uses
libpcl for coroutines and hlt.c to communicate with DOS code.
It is not clean because it has a few hooks in int.c; namely
do_int(), do_int_from_hlt() and a few other funcs were changed
with adding hooks. There is also an old do_call_back() code still
available for vga.c's legacy modeswitching; it is largely irrelevant
these days because of KMS, so I decided agains wasting my
time on it.
Overall I think it is fine. We have coopthreads_v1 to compare
to. It was intended to be fully self-contained and ended up in
an unmaintainable state. Adding a couple of hooks into int.c
should not be a big deal when the benefit is such a simple
and small implementation as mine certainly is. :)

Q: Why did it took so many time and changes to get the thing
to just work?
A: Because there were too many bugs and assumption in dosemu
code that I had to fix. Most of them were not directly related to
coopthreads, just uncovered by it, and are already merged to master.
I think not a single bug was found in coopth.c itself since the
very first commit of it.

Q: So, what are the plans?
A: To start threatening people with merging the thing to master:
caution advised!

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do we need coopthreads_v2?

Stas Sergeev — 2012-08-08T15:19:26

Hello.

For a few days I was toying around an idea to
resurrect coopthreads. For this I created the branch
"coopthreads_v2" in git. In this branch it is used by
the fossil to do a blocking wait directly inside dosemu.
This is likely not the right solution for fossil, so I am
not going to push it to master, but that's a demo.
Another test I did, was to create a while(1) loop in dosemu
code that prints something, and I was able to start and stop
that loop from dosdebug, just as if it would be a DOS
code (well, almost).
So, in theory, this will allow to move the bios.S code
directly to dosemu, in C.

Everyone is encouraged to take a look and make a comment.

Oh, and it have nothing to do with the old coopthreads
code written by Hans Lermen. There are many coopthreads
implementations around, I took libpcl, I really like the
way it is written (author David e Libenzi). And the dosemu
wrapper around it weights only a couple of kilobytes of
a source code, compared to 50K code of an old coopthreads.c
that no one can ever understand. :)

So, comments are welcome.

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svn

solarflow99 — 2012-05-29T17:24:39

Hi, I had about 4 - 5 simple changes i'd like to commit to svn, since
this is 1 time only and I don't want to risk messing anything up, what
is the best way I can do this?


Thanks,

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