Re: Experimental patch: An attempt to improve PC Speaker emulation accuracy

Posted on 2011-09-17, 15:54

by

by VileR

in DOSBox Development

in DOSBox Development

How is the PWM effect emulated in DOSBox? This effect was based on the fact that the speaker is so slow that the pulse waves are averaged and 4 - 6 bit sample playback is possible. I have some old demo's that can use the PC speaker, and it works so this "speaker slowness thing" seems to work, at …

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Re: Problems with video desynch in Version 0.74

Posted on 2011-09-17, 04:21

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by VileR

in DOSBox General

in DOSBox General

No, those are all software capture programs (not familiar with Roxio though). I meant an actual physical hardware device that hooks up into your PC's video output.

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Re: Problems with video desynch in Version 0.74

Posted on 2011-09-17, 04:00

by

by VileR

in DOSBox General

in DOSBox General

Just to clear things up; DOSBox doesn't just emulate the operating system, but also the CPU, hardware and peripherals, all in software . On top of that, you want to record *and compress* a video, in real time; run a separate app to record audio too; and rely on your OS to do the management. So yeah, …

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Re: Experimental patch: An attempt to improve PC Speaker emulation accuracy

Posted on 2011-09-17, 01:35

by

by VileR

in DOSBox Development

in DOSBox Development

yeah, I was thinking of watching the value of cntr and trying to obtain some stats on what's happening with it in each case (sounds that the patch fixes, sounds that the patch breaks, and sounds that work either way). Haven't had the time to do that yet, but as you just said - if the current code …

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Re: Experimental patch: An attempt to improve PC Speaker emulation accuracy

Posted on 2011-09-16, 16:10

by

by VileR

in DOSBox Development

in DOSBox Development

ouch... sounds like insane ring modulation going on 😀 Guess the "experimental" config switch (as in bloodbat's patch) is still needed then.

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Re: BIOS font legal status

Posted on 2011-09-16, 15:43

by

by VileR

in DOSBox Development

in DOSBox Development

As far as I know, the Hercules card (1982) had a ROM character set identical to IBM's MDA, and Hercules was pretty big in the marketplace for a while. If the font was proprietary, they would've gotten their asses handed to them but that didn't happen.... IBM pursued an open architecture for …

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Re: Direct3D patch (Host)

Posted on 2011-09-15, 20:12

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by VileR

in DOSBox Patches

in DOSBox Patches

I assume you've already tried messing with the CURVATURE and distortion settings in the .fx? haven't noticed any lagging input myself, and yeah this shader is badass. Major fan of how 640x200 modes actually get 200 scanlines (as opposed to 400 w/ some of the internal scalers...) Since the curvature …

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Re: PC Speaker crackles/skips with Sierra OnLine games

Posted on 2011-09-15, 17:37

by

by VileR

in DOSBox Games/Apps

in DOSBox Games/Apps

a few things to try: - a low, fixed cycles setting (instead of "auto" or "max") - run it full screen, in case you were running in a window - decrease the sample rate, under [mixer] and/or [speaker] - try selecting a different video output option (surface, overlay, opengl, ddraw etc) and see if that …

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Re: Cant get my motherboard work -> no display..

Posted on 2011-09-15, 04:33

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by VileR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hahaha, wow.... note to self: do NOT post while on sleep deprivation. 🤣 🤣 🤣

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Re: Cant get my motherboard work -> no display..

Posted on 2011-09-15, 02:17

by

by VileR

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Robin4 wrote: Do not have documents of this board.. The only i could find was on stason.org.. But i only need to wait on an diagnose POST card […] Show full quote Do not have documents of this board.. The only i could find was on stason.org.. But i only need to wait on an diagnose POST card, then i …

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Re: Magic key and hercules emulation

Posted on 2011-09-14, 17:11

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by VileR

in DOSBox General

in DOSBox General

Old application and Hercules mode Looks like it just doesn't work on recent DOSBox versions, though it did on older ones. Maybe it's been fixed in SVN since 0.74, maybe not. Even that screenshot says it's expecting a monochrome card, so yeah, you didn't word your question very well.

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Re: ACBLSCORE

Posted on 2011-09-12, 00:22

by

by VileR

in DOSBox Games/Apps

in DOSBox Games/Apps

A. prompts for "internal" paths DO accept \BACKUPS [as well as \ACBLSCOR \ACBLSCOR\GAMEFILE GAMEFILE\ - any path that actually exists AFAICT] B. prompts for "external" paths [which wouldn't accept \BACKUPS] also won't accept \ACBLSCOR \ACBLSCOR\GAMEFILE GAMEFILE\ - or, it appears, any path. Online …

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Re: DOSBox closes with Master of Orion

Posted on 2011-09-11, 23:48

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by VileR

in DOSBox Games/Apps

in DOSBox Games/Apps

are those the exact same mount commands you used when you *installed* the game, as well? (did you install it inside DOSBox, at all?) In general, the mounted drives have to be identical during installation and gameplay, but also note that games usually don't like it when they think they're in the …

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Re: Old obscure game (Labyrinth) that won't execute

Posted on 2011-09-08, 23:29

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by VileR

in DOSBox Games/Apps

in DOSBox Games/Apps

yeah, you probably have a point there. Off-topic: are there any good resources you'd recommend, for those who want to start getting their heads around x86 assembly/debugging? I've got some programming background, but mostly as a hobby, and nothing near as low-level as this stuff. I don't even have …

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Re: Old obscure game (Labyrinth) that won't execute

Posted on 2011-09-08, 17:38

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by VileR

in DOSBox Games/Apps

in DOSBox Games/Apps

Ripsaw: fantastic, works like a charm. Thanks (as always)! haha... I doubt that a tutorial would help too many people unless they already know x86 assembly like the back of their hands and are grand wizards at debugging. However, if there was a web page of sorts, housing all those small game- …

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Re: Old obscure game (Labyrinth) that won't execute

Posted on 2011-09-08, 16:26

by

by VileR

in DOSBox Games/Apps

in DOSBox Games/Apps

naturally... also tried low cycle counts, loadfix, and the different cpu settings. Should've mentioned that. looking at the .com files, it seems like the compiler was a Borland one from '85, if that gives anyone a clue towards troubleshooting this. It ain't the infamous runtime error 200, though.

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Old obscure game (Labyrinth) that won't execute

Posted on 2011-09-08, 13:03

by

by VileR

in DOSBox Games/Apps

in DOSBox Games/Apps

I've unearthed an old CGA/Herc puzzle game that I remember playing as a kid - it's titled simply Labyrinth. It's in English, but might have been a local Israeli production, not sure about that though. You go through random mazes of increasing difficulty while collecting "pebbles". The files have …

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Re: Patch & Test Build - CGA w/ Monochrome Monitor Support

Posted on 2011-09-08, 09:03

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by VileR

in DOSBox Patches

in DOSBox Patches

Nvidia geforce GT 240, with the latest drivers. (280.26) Also tested on an older card, GeForce 7300 SE, with the latest driver version too, and got the same behavior with the DLLs... but that card can't handle the CRT shader anyway 😜 both are running on XP Pro SP3 machines, btw.

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Re: Patch for OpenGL fullscreen bug

Posted on 2011-09-07, 20:29

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by VileR

in DOSBox Development

in DOSBox Development

I tried to, but it looks a bit wonky and moire-patterned on my 1280x1024 monitor... i don't think there's a solution other than "buy more pixels" 🤣

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Re: Patch & Test Build - CGA w/ Monochrome Monitor Support

Posted on 2011-09-07, 19:04

by

by VileR

in DOSBox Patches

in DOSBox Patches

I am using d3dx9_42.dll released in 2009 instead. What's the matter with the shaders? I modified several shader files about two months ago so that they should work properly with it. using the DLL from your build produces errors: D3D:Using triple buffering D3D:Error in pixel shader shaders\CRT.D3D. …

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