...Then again dosbox will never trigger an int 0x24... This is good to know. I should point out, though, that I am building my app to be MS-DOS compatible as well as DOSBox compatible, but not exclusively DOSBox. So, of course I have to adhere to the world of the machine as well as the emulator …

try something like int 0x21 ah=0x36 for various drives. be wary of floppies though. Those are always special. This works for the ready disk, but for the case of the non-ready disk it triggers Int 24h which I would like to avoid. After some further digging, here is what I see regarding DOSBox mounts …

you want to check for a DOS drive and check at BIOS level... Are you sure that that is best way ? (hint no games uses this) I want to check for a DOS drive being ready, not just that the drive exists. Something I neglected to mention in my original post is that I would prefer not triggering an Int …

I have a DOS app that lists drive letters and drive types if they are ready. I want to programmatically identify DOSBox mounts that are ready from within a DOS app so I can add them to the app's "ready drive" list. For example, when I want to check a drive ready for a DOS drive, I use Int 13h/AH=2h …

h-a-l-9000 wrote: ..The problem with MB5 might be an incompatible DLL. I've already identified the problem in MB5. (posted in the other thread Re: unhandled exception in DosBoxMB5) I'm working with freshly built dependency libraries btw. Logs coming soon!

Unhandled exception problem identified! nullmodem.cpp, line 388 change: log_ser(dbg_aux,"Nullmodem: A client (%s) has connected.", COMNUMBER,peeripbuf); to: log_ser(dbg_aux,"Nullmodem %d : A client (%s) has connected.", COMNUMBER,peeripbuf); 2 args requre 2 format modifers. I can't see how this ever …

Precompiled builds? Depends on who compiled it. But since you seem to be about to track crashes, just try compiling it yourself. Check the ./configure parameters (or config.h for msvc) for some parameters that allow you to compile modem/ipx/whatever support into dosbox. I built the latest SVN of …

Do the official CVS daily builds have modem emulation support? I just tried dosbox_08.02.2010 and I'm getting invalid type for serialx.

Uh oh better don't post about unofficial builds here. Im sorry for this. If it makes any difference, ultimately what I am seeking is the solution that specifically regards the official build. This is just an intermediate stopping point to that end. I am most willing to put in the time where needed …

This is a continuation of the thread at http://www.vogons.org/viewtopic.php?t=24028&highlight=chessmaster , part of which is now more appropriate in this subforum. The error is: Unhandled exception at 0x1029984f (msvcr90d.dll) in dosbox_debug.exe: 0xC0000005: Access violation reading location …

h-a-l-9000 wrote: serialx=... ... ... dbgall to activate the logging in MB5 when i change serial2 nullmodem port:5000 to serial2 nullmodem port:5000 dbgall when the client connects, the nullmodem server crashes 😢 i guess that gives me something else to debug when i get this built.

I can say this much. The problem appears to be a compatibility issue with Chessmaster and DosBox's serial communcations. I have VC++ 2008 installed and I've downloaded the SDL, SDLNet, and DosBox sources. This week I am going to try and "Step Into" the serial and nullmodem source code with the …

Do you attempt the connection on the same computer or on different ones? As on the same computer you need different listenports for each instance. Different computers. In the COM port settings I'd have tried lower baud rates and different flow control (of course identical settings on both sides). I …

Is this a Windows game? If yes, Windows has some COM port settings in its menu. Yes, this is a Windows game. I've gone through several blind permutations of settings changes with the Windows Ports Settings and there are no apparent differences. I know to restart Windows 3.11 after each settings …

I have an image with Dos 6.22 / Windows 3.11 that I boot with DosBox 0.73. I am attempting to get either modem or nullmodem communcations working with Chessmaster 4000 Turbo which I'll refer to in this thread as CM . The problems are as follows: Attempts with emulated modem results in a connect, but …