Re: Multitask problem : dosbox in Xandros linux on EeePc

Posted on 2008-04-12, 09:06

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

ykhwong's CVS build of DOSBox has support for time and date stamps, but I don't know if that particular feature is in the Linux build or not: http://www.vogons.org/viewtopic.php?t=9306 I noticed another thing that doesn't always work: in the list of packets to open, the statistics about the content …

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Dungeon Keeper speed issue

Posted on 2008-04-10, 22:17

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Dungeon Keeper generally runs very smoothly in DOSBox 0.72, but I found my framerate suddenly hit single digits when I had to possess a dragon in the first bonus level. When you possess creatures (control them with a first-person perspective), several of them have different ways of seeing things; I …

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Re: Multitask problem : dosbox in Xandros linux on EeePc

Posted on 2008-04-09, 19:28

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The problem was easier to find with the DOSBox debugger than I thought it would be. Blue Wave appears to have a flaw where it uses the DOS "FindFirst" function INT 21/4E with a malformed filespec. Using the example mail packet the program comes with, it tries to find "C:\BWAVE\WORK\WELCOME.XTI*.BAK …

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Re: Multitask problem : dosbox in Xandros linux on EeePc

Posted on 2008-04-07, 17:25

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I ran version 2.3 as an eval, and the file to be compressed is deleted by the program before it even shells out to the archiver. :dead: It would take some work with the debugger to find out why it decides to delete it. I thought maybe sensitivity to correct date/time stamps on files might be a …

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Re: Multitask problem : dosbox in Xandros linux on EeePc

Posted on 2008-04-07, 15:20

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The command you were using would be substituted for in my example by the program, so no need to change it. The INT 21 stuff is how the program would execute from within its code. However, it's an interesting thing to try. If you set the command to run as just "COMMAND.COM", with no parameters, the …

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Re: Multitask problem : dosbox in Xandros linux on EeePc

Posted on 2008-04-07, 13:33

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

A typical method for executing DOS commands (including batch files) from within a program is to execute COMMAND.COM with INT 21, AX=4B00 and set for it a command line of "/C ". I can say for sure that when using this method in DOSBox, as in real DOS, the calling application will wait for the spawned …

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Re: Invert Left/Right Audio Channels Stereo Sound?

Posted on 2008-04-06, 14:32

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by ripsaw8080

in DOSBox Patches

in DOSBox Patches

Hmm, although System Shock does have a setup option for "Old SoundBlaster Pro" and "SoundBlaster Pro", the game's config file doesn't change with either setting, and there is only one SBPRO.DIG driver file... so perhaps the distinction is only important for auto-detection? Anyway, a log with the …

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Re: Invert Left/Right Audio Channels Stereo Sound?

Posted on 2008-04-06, 01:33

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by ripsaw8080

in DOSBox Patches

in DOSBox Patches

FYI, two DSP commands are issued between that first single-sample transfer, and the normal sound-producing tranfers: 0x41 (set output sample rate) and 0xC6, which generates a call to DSP_PrepareDMA_New. The "PrepareDMA" functions in DOSBox end up calling DSP_DoDMATransfer, which seems like it might …

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Re: Invert Left/Right Audio Channels Stereo Sound?

Posted on 2008-04-05, 20:04

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by ripsaw8080

in DOSBox Patches

in DOSBox Patches

After working on my mixer patch, I realized that anything causing the samples to be shifted in the DMA buffer could cause the stereo channels to get crossed. Looking at the code in sblaster.cpp, something caught my eye in GenerateDMASound: case DSP_DMA_8: if (sb.dma.stereo) { read=sb.dma.chan->Read( …

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Re: Dawn patrol and Dawn patrol head to head

Posted on 2008-04-03, 13:20

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

You can download v5.3a of UNIVBE from SciTech's site for free, but don't expect support for it. This version seems to work pretty well in DOSBox, and I haven't had to mess around with EMS or whatever to get it to work. Just install it, register it with the provided codes, and run UNIVBE.EXE (the …

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Re: Difference between horisontal and vertical mouse movement in Constructor

Posted on 2008-03-28, 23:47

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I don't know what might be causing the difference in axial acceleration/sensitivity, but whatever the case may be, you can probably use MOUSE2KV to achieve better results by playing with the settings until you're happy. http://www.vogons.org/viewtopic.php?t=1059 It was originally intended to help …

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Re: no sound effects in It Came From The Desert

Posted on 2008-03-25, 21:07

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Set irq=3 for the soundblaster config in the DOSBox conf file, and the digitized sfx can be heard with the SB option in the game. The README mentions the hard-coded IRQ for the SB. 😉

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Re: [autoexec] Problem

Posted on 2008-03-25, 01:48

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by ripsaw8080

in DOSBox General

in DOSBox General

Basic thing to try is changing core and cycles. Death Rally is a protected mode game (PMode extender) that has hefty CPU requirements; I run it with core=dynamic, cycles=max. BTW, this forum takes a dim view of "downloaded" copies of games, if for nothing else than they often are the cause of …

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Re: No CD-Audio on Vista?

Posted on 2008-03-25, 01:37

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I've experimented with cuesheets using WAV and MP3 formatted audio tracks, and had no success getting them to work directly with DOSBox. The ISO/WAV images work when mounted with Daemon Tools, and the ISO/MP3 images work for burning with Nero, so maybe it's just a matter of correct formatting... …

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Re: [autoexec] Problem

Posted on 2008-03-25, 01:18

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by ripsaw8080

in DOSBox General

in DOSBox General

DEATH>RALLY.EXE I think you got part of the DOS prompt in there or something; should just be RALLY.EXE Another thing: I believe Death Rally is a CD-ROM game, and you'll need a mount for the CD or image.

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Re: Invert Left/Right Audio Channels Stereo Sound?

Posted on 2008-03-21, 03:31

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by ripsaw8080

in DOSBox Patches

in DOSBox Patches

I've finished my first try at making a patch for exchanging the left and right digital stereo channels in DOSBox 0.72. I implemented all the features I mentioned in my previous post, and I think it's a complete little package. Perhaps a moderator will feel this is worth splitting off into the …

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Re: Invert Left/Right Audio Channels Stereo Sound?

Posted on 2008-03-19, 21:19

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by ripsaw8080

in DOSBox Patches

in DOSBox Patches

The specific game, or its drivers, are most likely at fault for swapping the stereo channels, so there's really nothing to "fix" in DOSBox; but it is possible to make it a bit more adaptable. Implementing a reverse stereo feature in DOSBox at the mixer level is fairly simple, at least conceptually . …

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Re: Boot DOS and read CD?

Posted on 2008-03-18, 19:47

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by ripsaw8080

in DOSBox General

in DOSBox General

Ah, so I guess 21/4408 is the culprit, then, if for different reasons than the fixed/removable issue. Perhaps there are other IOCTL functions that should generate an error for CD drives in DOSBox as well?

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Re: Boot DOS and read CD?

Posted on 2008-03-18, 12:32

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by ripsaw8080

in DOSBox General

in DOSBox General

I wonder if all versions of DOS handle it the same. I find it interesting that the WinXP NTVDM considers CD drives as fixed... not that it's the model for proper DOS operation, but it demonstrates some inconsistency. The problematic installer is dated in the Summer of '93, and MS-DOS 6.0 came out in …

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Re: Boot DOS and read CD?

Posted on 2008-03-18, 11:57

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by ripsaw8080

in DOSBox General

in DOSBox General

I have stepped through the code and observed what it is doing; the TSR was just a confirmation for what I learned. I don't seem to be succeeding at overcoming your skepticism; however, you can use the information I gave you to reproduce the problem for yourself.

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