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Re: Dosbox exits when mouse pointer is on the edge of screen

Posted on 2021-07-19, 14:29

in DOSBox Development

in DOSBox Development

Going by the EIP in the error message, the problem appears to involve pushing and popping SS without doing anything with ESP, which raises red flags in my mind. The subroutine in question is in DEADSEAS.EXE at offset 1765C0, and seems be used for the DPMI function call for real mode interrupts. The …

Re: Dosbox exits when mouse pointer is on the edge of screen

Posted on 2021-07-19, 08:03

in DOSBox Development

in DOSBox Development

So, you are not calling get_mouse_mickeys(), rather it is Allegro that does that on its own when the pointer is at the edge of the screen? Do you use set_mouse_range() to limit the pointer to the screen dimensions? If not then it may be a good thing to try.

Re: Dosbox exits when mouse pointer is on the edge of screen

Posted on 2021-07-19, 07:05

in DOSBox Development

in DOSBox Development

But if the pointer is on any edge of the screen, game unexpectedly exits, Dosbox says general protection fault error. I want to clarify that it is the 32-bit DPMI host included with your program, CWSDPMI, that is exiting and reporting an error. DOSBox continues to work normally after your program …

Re: Black Knight - Marine Strike Fighter

Posted on 2021-07-18, 12:15

in DOSBox Games/Apps

in DOSBox Games/Apps

I mentioned Patches Scrolls in my decade-old comment, but for some reason the thread starter went to FileFront instead. Anyway, Patches Scrolls is still around: https://www.patches-scrolls.com/dl.php?file=bkupd133.zip

Re: Dosbox not detecting custom folder

Posted on 2021-07-10, 01:30

in DOSBox General

in DOSBox General

Yes, -c commands are essentially added to the end of the autoexec commands. Putting the autoexec commands in a batch file and executing that batch with -c after the mount command should work; but remember to CALL a batch file if you intend to do any more -c commands after it.

Re: I remember hercules being sharper, is this me?

Posted on 2021-07-05, 12:15

in DOSBox General

in DOSBox General

Setting windowresolution=720x348 with no scaling and no aspect correction should render the Hercules graphics pixels of KQ1 AGI as sharp as your monitor possibly can. ;) Seriously, though, I suppose what you're looking for is advice on scaling methods. Have you tried SVN with output=opengl, scaler= …

Re: Future Conflict - Sound Blaster freezes at mission end

Posted on 2021-07-01, 17:10

in DOSBox Games/Apps

in DOSBox Games/Apps

The game, or I should say its SB driver, does not unmask the SB IRQ; so prior unmasking appears to be assumed. I've attached a small program that will unmask IRQ 7, the default SB IRQ, and running it in DOSBox before running the game should prevent the freezes.

Re: Batman Forever The Arcade Game: Please insert the BATMAN CD into the CD-ROM drive

Posted on 2021-06-30, 19:06

in DOSBox General

in DOSBox General

The CUE looks okay. However, some games check the start time and length of audio tracks as a kind of CD-check, and the imaging software used to make the image might have not recorded the specific timing the game looks for. Are there different times in this CUE compared to ones you used previously?

Re: Batman Forever The Arcade Game: Please insert the BATMAN CD into the CD-ROM drive

Posted on 2021-06-30, 18:32

in DOSBox General

in DOSBox General

You should make a CUE/BIN format image of the disc, as the ISO format can't contain audio tracks. Perhaps you use "ISO" to refer to any kind of disc image, but please do not do that as it can be understood as referring to the ISO format. If you did make an ISO format image then the game will likely …

Re: saving the game

Posted on 2021-06-22, 20:36

in DOSBox General

in DOSBox General

To answer as vaguely as your question: other games may have similar methods, or different methods, or no methods at all.

Re: saving the game

Posted on 2021-06-22, 19:19

in DOSBox General

in DOSBox General

It's not terribly convenient, but GTA 1 does allow saving the game between "levels" -- to end a level you must acquire a certain amount of money or meet some other objective.

Re: Possible to mute certain MIDI channels under DOSBOX.config?

Posted on 2021-06-22, 18:12

in DOSBox General

in DOSBox General

The AdLib music in DOSBox is not MIDI; it is an emulation of OPL chips. DOSBox does not have a provision to mute channels or instruments of OPL music, but it can capture port writes to the OPL chip in the DRO format with the Ctrl-Alt-F7 key combo. With the DRO file you may find external player or …

Re: Possible to mute certain MIDI channels under DOSBOX.config?

Posted on 2021-06-22, 16:19

in DOSBox General

in DOSBox General

For what reason do you want to mute certain MIDI channels? In any case, there is no provision for muting channels in DOSBox; however, there are external tools like MIDI-OX on Windows that will do what you want, as well as many other kinds of MIDI manipulations.

Re: Does DOSBox support TSRs?

Posted on 2021-06-22, 14:10

in DOSBox General

in DOSBox General

You missed the most important part of calling the original IRQ 0 handler BEFORE the dump process, and adding the recursion flag doesn't really do anything without that. The truth is that writing active TSRs that call DOS functions is actually kind of a pain. DOS itself can be interrupted by an …

Re: Line Wars 2 with S3 acceleration?

Posted on 2021-06-22, 07:07

in DOSBox Games/Apps

in DOSBox Games/Apps

https://www.vogons.org/viewtopic.php?f=33&t=27723 A thing to keep in mind is that there are many different brands and models of S3 video card, and there are significant differences between them in hardware and video BIOS. DOSBox nominally emulates S3 Trio 64, but it actually seems to be a bit of a …

Re: Does DOSBox support TSRs?

Posted on 2021-06-21, 13:30

in DOSBox General

in DOSBox General

@ripsaw8080: I am not sure I fully understand what you just wrote. The point is that you should call the original IRQ 0 handler before your memory dumping process, not after, but then you need some simple logic to deal with recursion. Here is an example of the handler code using your style. I have …

Re: Does DOSBox support TSRs?

Posted on 2021-06-21, 05:52

in DOSBox General

in DOSBox General

The most significant problem that I see is calling DOS file functions before IRQ 0 has been acknowledged. No IRQ can occur while IRQ 0 is in service because it has the highest priority. Floppy drive controllers use IRQ 6, some hard drive controllers use IRQ 15, and so trying to write to drives while …

Re: Does DOSBox support TSRs?

Posted on 2021-06-19, 23:28

in DOSBox General

in DOSBox General

IMO, TSRs that react to a key press should hook the keyboard IRQ 1 handler (INT 9) because the interrupt only occurs when there is a key press or release. Using the timer IRQ 0 (INT 8) as you have is inefficient and adds unnecessary processing to the system. Since you're posting in the DOSBox …

Re: Rescue Rover and Rescue Rover 2 do not detect soundblaster in DosBox

Posted on 2021-06-18, 09:52

in DOSBox Games/Apps

in DOSBox Games/Apps

Apparently so. As I mentioned, MobyGames is not definitive -- it doesn't dissect a game to verify what is printed on the game box or what the publisher claims. Blame the misleading interface for the confusion.

Re: Rescue Rover and Rescue Rover 2 do not detect soundblaster in DosBox

Posted on 2021-06-18, 09:29

in DOSBox Games/Apps

in DOSBox Games/Apps

It appears to be a false claim of support for SB and DSS, or perhaps just a misunderstanding because the interface is misleading. The game has only simple speaker and OPL sfx, no PCM, no music. Why did they leave the music on/off tab in the interface when there's no music? I suppose because it was …

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