Re: Best way to shutdown a 386/486 ?

Posted on 2019-10-06, 02:59

by

by jmarsh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Errius wrote: I believe PARKing the drive is only needed if the computer is going to be physically moved. No. Early drives should always be parked to avoid the heads landing on the usable areas of the platters. Later drives (pretty much IDE onwards) auto-park when powered off.

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Re: ethflop - a network-backed floppy emulator for DOS

Posted on 2019-10-05, 14:09

by

by jmarsh

in Release Announcements

in Release Announcements

I wonder if this code could be modified to provide Sound Blaster emulation over a network as well. A Sound Blaster shouldn't be much harder to emulate than a floppy controller, since in both cases, you'd have to handle DMA. Such an emulator could then act as a Pulseaudio client and stream the audio …

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Re: PowerPC Dynamic Recompiler (patch)

Posted on 2019-10-05, 13:54

by

by jmarsh

in DOSBox Development

in DOSBox Development

So it turns out OSX uses a different ABI for PowerPC which won't work with this code, I'll have to make some adjustments.

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-05, 13:50

by

by jmarsh

in DOSBox Development

in DOSBox Development

You'd have to compare builds made from identical source+with (roughly) the same compiler... the build in the first post is made with VS9 (and missing quite a few optional features), I believe "official" builds are made with mingw.

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Re: Bottom triangle mismatch openglnb on NVIDIA

Posted on 2019-10-04, 03:46

by

by jmarsh

in DOSBox Development

in DOSBox Development

Note that because this is early OpenGL the texture is larger than what is rendered (texture dimensions must be a power-of-2), hence the co-ords. The easiest way to hide the unwanted portions of the triangle would be using a scissor box but I don't think it's required anyway; the triangle will …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-02, 14:00

by

by jmarsh

in DOSBox Development

in DOSBox Development

For anyone testing 64-bit builds on windows, SDL can have a minor issue where it causes a crash in a message handler and the OS "helpfully" tries to permanently apply a compatibility fix to hide it. This was fixed in a later SDL-1.2 version and can be backported as a workaround: https://hg.libsdl. …

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Re: PowerPC Dynamic Recompiler (patch)

Posted on 2019-10-02, 04:54

by

by jmarsh

in DOSBox Development

in DOSBox Development

Were you able to build with "#define USE_SDA_BASE" left uncommented (active) in risc_ppc.h?

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Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-10-01, 10:14

by

by jmarsh

in DOSBox Development

in DOSBox Development

You could just add them back and use the stub versions for 64-bit.

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-01, 08:50

by

by jmarsh

in DOSBox Development

in DOSBox Development

GenReg::Clear() checks if DYNFLG_CHANGED is set. If so it calls Save(), which clears it. This isn't new code, it's copied verbatim from risc_x86.h. Maybe you should improve your CI workflow to build the most popular DOSBox configuration (32-bit + dyn_x86).

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-01, 08:13

by

by jmarsh

in DOSBox Development

in DOSBox Development

Information for line 434 refers to the value of `dnew->genreg` after Clear (this pointer is set to 0 inside Clear if - I assume that's the case here - there's a cyclic dependency between dynrec and genrec (line 244)). Therefore whenever this code will start with (`dsynch->genreg == nullptr` and ` …

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Re: 64-bit dynamic_x86 (patch)

Posted on 2019-10-01, 05:46

by

by jmarsh

in DOSBox Development

in DOSBox Development

The only static analysis issue that looked remotely valid to me was "Called C++ object pointer is null" for line 444 in risc_x64.h, but the analyzer has performed an invalid simulation (assumes dnew->genreg != dsynch->genreg but also assumes both values are NULL, making the first assumption invalid …

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Re: AUDIO Patch supporting FLAC, Opus, and MP3 audio tracks

Posted on 2019-09-29, 12:24

by

by jmarsh

in DOSBox Patches

in DOSBox Patches

Kisai wrote: If GoG is in fact selling games with lossy audio, they're not doing it with dosbox, and are selling inferior versions. ScummVM doesn't support anywhere close to GoG's full library of DOS games. If you want a freebie example go grab Shadow Warrior (classic).

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Re: AUDIO Patch supporting FLAC, Opus, and MP3 audio tracks

Posted on 2019-09-28, 23:42

by

by jmarsh

in DOSBox Patches

in DOSBox Patches

Someone who is playing a game with lossy-audio likely is playing a pirated version of the game, as it was a common thing back in the late 90's, early 2000's for pirates to convert cd-audio and wav files to lossy audio to make their rips smaller. Practically all games sold on gog.com that have CD …

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Re: Blues Brothers character select *VERY* slow in DOSBOX

Posted on 2019-09-26, 06:08

by

by jmarsh

in DOSBox Games/Apps

in DOSBox Games/Apps

Pizza Worm might have the same issue? The fade-in/fade-out of the main title screen takes much longer than it should under DOSBox.

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Re: PowerPC Dynamic Recompiler (patch)

Posted on 2019-09-25, 05:55

by

by jmarsh

in DOSBox Development

in DOSBox Development

The "b" (binary) literals can be replaced with their decimal values if anyone else is stuck using a compiler as ancient as Apple's gcc.

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Re: Please add option to remove 'banner'

Posted on 2019-09-25, 05:49

by

by jmarsh

in DOSBox Development

in DOSBox Development

It's displayed for 600ms with the last 100ms fading out. That's blink-and-you-miss-it speed. And yet people still complain about it! When I was working on my wii build I never saw it either due to the tv mode changes taking too long to settle, so I replaced the wait with the virtual memory …

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Re: Please add option to remove 'banner'

Posted on 2019-09-24, 00:24

by

by jmarsh

in DOSBox Development

in DOSBox Development

It's displayed for a fixed time already, not dependant on loading speed/access times.

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Re: Intermittent Write Errors on Compact Flash

Posted on 2019-09-23, 02:57

by

by jmarsh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have you tried different power cables to the adapter? When you use a real HDD it would be using a different plug... Maybe also replace the jumpers as well, there might be a poor connection in there somewhere.

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Re: Please add option to remove 'banner'

Posted on 2019-09-23, 02:51

by

by jmarsh

in DOSBox Development

in DOSBox Development

The logo was added because companies were selling DOSBox (as part of other products) without acknowledgement. So making it configurable would be counterproductive to its existence. This is a direct quote from the source code: /* Please leave the Splash screen stuff in working order in DOSBox. We …

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Re: How do I change resolution to 5:4????? (1280x1024)

Posted on 2019-09-19, 06:24

by

by jmarsh

in DOSBox General

in DOSBox General

Play with the settings on your monitor, look for something like "wide mode" or "aspect" and try other modes to preserve the original aspect ratio instead of stretching.

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