Re: DOSBox speed vs real DOS PC?

Posted on Yesterday, 07:40

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by ripsaw8080

in DOSBox General

in DOSBox General

Silanda wrote on Yesterday, 07:15: I've got half a suspicion that NBA Jam TE's problems might be related too. If you refer to flickering at higher cycles, that issue should be resolved in SVN.

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Re: Startup audio 'pop' in Monkey Island 1 (CDROM edition) with sbtype = sb16

Posted on 2020-05-25, 06:02

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I may have become relatively insensitive because there are games (usually not from big name developers, mind you) doing stuff during SB initialization that is much worse for the ears than a small pop. In any case, I can safely suggest not going too far with hacks. 😉

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Re: Startup audio 'pop' in Monkey Island 1 (CDROM edition) with sbtype = sb16

Posted on 2020-05-25, 05:10

by

by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

A small DMA transfer is not unusual for SB detection / initialization when games start up. It can cause an audible pop depending on the sample(s) in the transfer. The difference between SB16 and other SB types is likely due to the speaker enable state. My use of the word "speaker" here refers to a …

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Re: Wizard! demo title screen glitch

Posted on 2020-05-03, 12:59

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Comparing pixels to the tower graphic in the animation of the release version, the damaged bytes in the demo's INAN.ANM starting at 0ffset 472E should be changed from 00 00 1B 1D to 3E 7F 3E 7C. You could use this as an "educated guess" until an unbroken copy surfaces, at which point you can check …

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Re: Wizard! demo title screen glitch

Posted on 2020-05-02, 15:42

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Doesn't appear specific to DOSBox; same thing happens in other emulators. AFAICT, the animation file is corrupt. The damage can by repaired by modifying the bytes in INAN.ANM at offset 472E from 00 00 1B 1D to 3C 7F 3C 7F. The four pixels are perhaps not original, but they look okay. The copy you …

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Re: Pinball Fantasies Trainer

Posted on 2020-05-01, 09:42

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

We have the same version, except INTRO.MOD differs in hash value, but that is due the file being branded by the installer for copy protection purposes. It shouldn't be an issue if the game works without the trainer. I notice you have no PINBALL.CFG file, and I wonder why, as the game should have …

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Re: Pinball Fantasies Trainer

Posted on 2020-05-01, 09:15

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

List of filenames with the file's CRC-32 hash will do.

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Re: Pinball Fantasies Trainer

Posted on 2020-05-01, 08:57

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Hmm, all things the same should produce the same result, so perhaps there is some important difference in launching. For example, what are your exact commands for mounting drives and executing the trainer program? Maybe you have a different version of the game. I have seen at least two versions ( …

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Re: Pinball Fantasies Trainer

Posted on 2020-05-01, 06:09

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

It's working for me in 0.74-3 and SVN with default settings except machine=vgaonly and cycles=8000. The trainer's text color appears correct in SVN but wrong in 0.74; other than that it seems okay. Does the game start up when running PINBALL.EXE directly? I got the trainer from pouet.net; where did …

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Re: Cannot get Future Shock & Skynet running without crashing.

Posted on 2020-04-29, 18:07

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Not mounting the D drive with "-t cdrom" back then may be what went wrong when installing. It happens (too) often that users new to DOSBox don't know to use the "-t cdrom" switch and run into problems because of it. There have even been cases where people figured out how to hack a game to remove its …

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Re: Cannot get Future Shock & Skynet running without crashing.

Posted on 2020-04-29, 17:07

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Well, the installer should have set the source path to D:\ if the game was installed from there. Anyway, the source drive being mounted with the "-t cdrom" switch is what stopped the crashes. You want to be sure? Just try removing that switch. 😉

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Re: Cannot get Future Shock & Skynet running without crashing.

Posted on 2020-04-28, 15:29

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

The point being made in the specific post I linked to in that thread is that the crashes are a nasty sort of CD-check. So if you aren't using a hacked copy of SkyNet that removes the check, you should mount the D drive with "mount d d:\ -t cdrom" rather than the "mount d d:\" you've been using. …

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Re: Paratrooper game missing helicopter/airplane sound in DOSBox 0.74-3

Posted on 2020-04-28, 13:56

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

Maybe. An alternate idea is: if (p->bcd==true) BCD2BIN(p->write_latch); if (p->write_state != 0) { + if (p->mode == 3) p->write_latch &= 0xfffe; if (p->write_latch == 0) { if (p->bcd == false) p->cntr = 0x10000; else p->cntr=9999; } else p->cntr = p->write_latch; Seems like what the hardware might …

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Re: DOSBox-X branch

Posted on 2020-04-28, 10:41

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by ripsaw8080

in DOSBox Patches

in DOSBox Patches

the LSB masking only affects reading the counter. Yes, but the question is if it should apply when the counter is written. I realize it would halve the number of possible frequencies that can be selected, but the difference is perhaps small enough to be indistinguishable. It seems more like what …

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Re: DOSBox-X branch

Posted on 2020-04-28, 07:50

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by ripsaw8080

in DOSBox Patches

in DOSBox Patches

The odd number counter for square wave is currently handled for reading the counter (&oxfffe), which was needed for Corncob 3D. So I wonder if it would be correct to do the same when the counter is written rather than treating 1 as a special case.

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Re: HDD image geometry detection bug

Posted on 2020-04-27, 21:51

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by ripsaw8080

in DOSBox Development

in DOSBox Development

Well, what you were describing was more like a reworking of the auto-sizing; it sounds doable... feel free to submit a patch. 😉 If you do work on it then you might look in the MBR fields for the geometry rather than the BPB, but I haven't researched the details.

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Re: Cannot get Future Shock & Skynet running without crashing.

Posted on 2020-04-27, 19:56

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by ripsaw8080

in DOSBox Games/Apps

in DOSBox Games/Apps

I suggest reading another thread starting from where I linked, but you can read from the start if you want the whole evolution of discovery, including a fix for the infamous door crash. 😉 Re: Terminator Skynet problem

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Re: Cannot get Future Shock / Skynet running without crashing. Help?

Posted on 2020-04-27, 19:50

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by ripsaw8080

in DOS

in DOS

See your other thread in the DOSBox section for some insight about what is going on with SkyNet.

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Re: HDD image geometry detection bug

Posted on 2020-04-27, 18:54

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by ripsaw8080

in DOSBox Development

in DOSBox Development

DOS can use a head count or SPT *less* than what BIOS is using, in which case not all of the image is being used by the filesystem and DOSBox switches from absolute sector addressing to CHS addressing, but *more* can cause corruption of the image with any software that performs BIOS access (such as …

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Re: HDD image geometry detection bug

Posted on 2020-04-27, 15:27

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by ripsaw8080

in DOSBox Development

in DOSBox Development

It's basically what I expected. No fault of BXIMAGE, the flat image file it creates is of a size that is perfectly suitable for the parameters it reports, but it's also suitable for twice as many heads with half as many cylinders. It's the BIOS of the system you are using that decided to auto-select …

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