I tried games from archive.org on different computers, but I can't run these games on 32bit version of Chrome on Windows 10 and 7. But 64bit version works well. Do you have this problem too ?

With empty dosbox.conf and otherwise default settings of anything:

Somehow output resolution of canvas does not match internal resolution. Please help identify cause. This is not due to scaling on CSS/DOM side, because Module.SDL2.image.data contains these artifacts too. Therefore it happens somewhere before..

I would like to question regarding em-scripten. I do not speak much English.Please understand.

I want use em-dosbox very strongly. but, im cannot this program. Im not programmer. That(em-scripten) is so hard to me.

I tried packaging with em-scripten.(my step below)

1. install em-scripten. (*cf : my system : windows7)
2. download and extract em-dosbox0.74 to "C:\temp\em-dosbox-dosbox-0.74"
3. run cmd , and prompt move "C:\temp\em-dosbox-dosbox-0.74"
4. typing "emconfigure ./configure"

then, error code printed.(below)

D:\Temp\em-dosbox-dosbox-0.74>emconfigure ./configure ERROR root: Exception thrown when invoking Popen in configure with args: "./configure"! Traceback (most recent call last): File "C:\Program Files\Emscripten\emscripten\1.12.0\emconfigure", line 24, in shared.Building.configure(sys.argv[1:]) File "C:\Program Files\Emscripten\emscripten\1.12.0\tools\shared.py", line 1087, in configure process = Popen(args, stdout=stdout, stderr=stderr, env=env) File "C:\Program Files\Emscripten\python\2.7.5.3_32bit\lib\subprocess.py", line 711, in init errread, errwrite) File "C:\Program Files\Emscripten\python\2.7.5.3_32bit\lib\subprocess.py", line 948, in _execute_child startupinfo) WindowsError: [Error 2]

D:\Temp\em-dosbox-dosbox-0.74>

I was so confused right now. I can not imagine what the error is resolved at all, whether to do.

Can you provide an easy guide for beginners?

Hi,

I'm using em-dosbox on my site http://gamer.build It works great in every environment except iOS. The programs just seem to crash after a few seconds. I'm thinking it could be related to memory. Can you check out http://gamer.build/TOWN.zzt on an iOS device and let me know what you think the issue could be?

Hello, after using this tuto (https://gist.github.com/gogromat/98a748bc8f447480b005) for installing em-dosbox , I get an error when I try to make. The error is : dosbox.cpp:398:3: error: use of undeclared identifier 'emscripten_force_exit' emscripten_force_exit(em_exitarg); 1 error generated Could you help me please.

I compiled em-dosbox according to the instructions in the Wiki. After that I tried to run a pure instance of DOSBox (without any additional software), just using the default dosbox.html file. It will run without any problem in Chrome or Firefox, however an Exception will be thrown when using Internet Explorer 11 in Windows 7.

"isScreen" is undefined
dosbox.js Line 1 Column 28211

The status bar just displays that an Exception had been thrown, the DOSBox canvas will remain empty.

shared:ERROR: emcc: EMTERPRETIFY is not supported by the LLVM wasm backend

Getting this error. If I compile with --DISABLE-SYNC it completes but the result doesn't work. What version of Emscripten should I use to compile. I tried a few different releases but get different errors every time. This is with latest-upstream

Seen in the code there are methods 'pause MainLoop', 'resume MainLoop'. Is it possible to save the state of a running application/game to the next start DOSBOX be able to start from the same place?

I upgraded to emscripten 1.35.0 because I wanted to see if that would mean better performance etc.

This lead to corrupt onscreen characters. Is this perhaps an issue with emscripten itself?

I believe you can safely re-enable ISO support in em-dosbox. The mutex functionality isn't supported in the SDL2 port, but that's partly because Javascript is inherently single threaded. The necessary functionality is in the language itself.

Give this a try and see if it meets with your approval.

Hello! I am following your project and I am very excited to be more advanced tests!

First, I need to know if I can boot en-dosbox with an image of floppy or hard drive? If possible which way to do this? as emdosbox upload a file "dosbox.conf"? I tested and I could not success. I created a folder "/boot" and inside copied an image of floppy (BOOT98.IMG) and dosbox.conf also. But to try to compile I get an error that is missing a third parameter?

My command is: ./packager.py novoboot boot ("novoboot" is a folder compiled, "boot" is a folder name.)

root@em-dosbox:~/em-dosbox/src# ls 1Feitos dosbox.cpp fpu Makefile.am pre.js 1loader dosbox.html gui Makefile.in repackager.py boot dosbox.ico hardware misc shell cpu dosbox.js ints packager.py version.py debug dosbox.o libs packager.py~ winres.rc dos emterpretify.txt Makefile platform

root@em-dosbox:~/em-dosbox/src# ./packager.py novoboot boot

When packaging directory, supply file to run as 3rd argument.

The dosbox.conf file is:

[dosbox] memsize=64 machine=svga_s3 [cpu] cycles=max core=auto [autoexec] imgmount a "BOOT98.IMG" -t floppy boot -l a

I test it under dosbox-0.74 official release and run ok! My intention is load under emdosbox small hard-disk image with vintage OS´s. If possible, I can create the packages (using packager.py) under Windows 7 64? Sorry for my writing, I am using the translator. Thank you in advance!

In the distant past I spent a lot of time playing MS-DOS games. After I started university in 1995, it was already more about revisiting old favourites than about simply playing games. For years after university I still had an old PC with DOS games, using it rarely, and eventually not using it anymore. I also have a DOS games directory on my current PCs, and DOSBox installed, but I practically never run it. I've probably spent less than an hour in DOSBox over the last year, and virtually no time running it in a web browser. I recently fixed the old PC with DOS games, and I still don't care about gaming there.

When I started this port I was already practically done with DOS gaming, but porting DOSBox to the web was an interesting challenge and a way to leverage any remaining interest in DOS. I loved doing that initially. But after it became popular my own experience became more about pleasing others than about doing something I loved.

I feel bad about not even reading issues posted on here. But I feel worse about doing work for free only out of a sense of obligation. I don't know how this could become something I love doing again.

used the advice from here https://www.mail-archive.com/[email protected]/msg08678.html

opened up codeblocks imported all the src files then replaced the instances

had to modify the makefile to use .bc instead of html so a --preload-file can be attached to it.

used this line am__append_1 = -s ASYNCIFY=1 -s EMTERPRET[email protected] -s FETCH=1 --preload-file media/

was not able to compile the bc to html and have it work so the preload was added during build. for some reason it needs a folder probably as a filesystem before the packager html's can be loaded

I came across this playing the excellent MS-DOS Game collection at the Internet Archive, great work! I was confused by the games there putting, e.g. "DOSBox SVN, CPU speed: 3000 cycles, Frameskip 0, Program: STUNT" in the window title (thus browser tab and browser history). Tabs and dropdowns cut off the end of this so you don't see what program you're running and it's quite confusing.

Em-DOSBox's GFX_SetTitle() in src/gui/sdlmain.cpp sets the title to the nerdy "DOSBox %s, CPU speed: %8d cycles, Frameskip %2d, Program: %8s",VERSION,internal_cycles,internal_frameskip,RunningProgram) a friendlier layout with the key information first would be "STUNT running in Em-DOSBox v. SVN (CPU speed: 3000 cycles, Frameskip 0)

(the misleading version "number" SVN comes from src/platform/visualc/config.h).

HTML Js dos in a folder drag into browser? How can i do this. before you give me npx commands where do i inject those when i do it on npm its says i does not have permission to install stuff

I got Emscripten using emsdk.

I have confirmed that Emscripten works fine via a test that Emscripten has.

The exact error looks likes this: ERROR:root:'/home/user/emsdk/emsdk/clang/e1.38.12_64bit/binaryen/bin/asm2wasm dosbox.temp.asm.js --total-memory=134217728 --trap-mode=allow -03 --mem-init=dosbox.html.mem --mem-base=1024 -o dosbox.wasm' failed

It is able to output dosbox.js but after the error message appears the file is deleted.

The directory contains dosbox.html.mem, and dosbox.js.orig.js as well.

Edit: I'm using the latest LTS version of Ubuntu (64bit).