Re: Dosbox none vs Normal 2x on a CRT

Posted on 2019-12-28, 22:05

by

by digistorm

in DOSBox General

in DOSBox General

I think CGA actually used 200 scan lines, so you wouldn't use normal2x scaling. But I haven't seen an actual CGA monitor for a long time so you should better wait for someone else to respond who owns an original CGA monitor…

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Re: Dosbox none vs Normal 2x on a CRT

Posted on 2019-12-28, 19:00

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by digistorm

in DOSBox General

in DOSBox General

VGA cards use double scan lines for the 200 and 240 vertical resolutions. So in that case normal2x scaling would be the closest to a real vga monitor.

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Re: DOSBox bug OS X regression

Posted on 2018-12-13, 09:33

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by digistorm

in DOSBox Development

in DOSBox Development

Just a quick reply. I am running DOSBox in the latest version of macOS, but I am running it in the 32 bit mode. I checked that box in an earlier version of macOS because it is not possible anymore in the latest version. That also means that I can't upgrade to the latest SVN version, because I will …

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Re: DOSBox bug OS X regression

Posted on 2018-12-11, 13:02

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by digistorm

in DOSBox Development

in DOSBox Development

What version of FastTracker are you using? I am running version 2.09 just fine in the latest DOSBox version (SVN). I use the GUS as a sound card, just as you described. And I tested the same module as you revered to (but I am running dozens of tracker software at the moment, and they all behave well …

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Re: Simmconn AWE64 Adapter

Posted on 2018-11-12, 13:18

by

by digistorm

in Marvin \ Sound

in Marvin \ Sound

Last week, I installed a Simmconn Value adapter with a 32 MB edo ram stick, and it works like a charm! Great way to make more use of the AWE64, as 512 kB was not really impressive.

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Re: Question about code and PCjr and svga_s3

Posted on 2015-01-27, 08:40

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by digistorm

in DOSBox Development

in DOSBox Development

The difference is that Steve Wozniak built his circuit in 1977, while the PCjr was released in 1984. 7 years in computer technology is an age. You wouldn't pay the full price for a PC from 2008 either.

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Re: AWE32 emulation (revival)

Posted on 2015-01-12, 13:57

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by digistorm

in DOSBox General

in DOSBox General

The AWE certainly had a rich feature set of specific wavetable functions no other card on the market had (floating point interpolation, hardware filters, chorus and reverb) and a lot of customizable DSP functionality. But… most programmers never used the advanced capabilities of the AWE. To easy the …

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Re: Change black "frame" to color in full-screen mode?

Posted on 2014-03-16, 08:31

by

by digistorm

in DOSBox Development

in DOSBox Development

I would say: go for option 2 with a slider to adjust the "over / under scan" just as you could do with a real analog monitor. It would be an additional option to extend the border to the display aspect ratio. C64 emulators also emulate the border and nobody has opposed to that (but on a C64 the …

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Re: How to mount on an Apple to the right folder (OS X 10.6.8)

Posted on 2013-01-08, 10:52

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by digistorm

in DOSBox General

in DOSBox General

You could try to install VirtualBox and install a copy of Windows on it. Alternatively you could buy VMware or Parallels Desktop and install Windows on it. They may even support pure MS-DOS installs, but I have never tried to.

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Re: Yellow tint on OSX using hq3x scaler

Posted on 2012-06-19, 22:37

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by digistorm

in DOSBox General

in DOSBox General

On my setup, colors are screwed with the SVN build in vga_only mode immediately at the DOS prompt, with svga(s3) it only in 16 bit color. Scalars are turned off. I use Lion 10.4 and I have had issues since the first version of Lion and DosBOX 0.74. Version 0.73 has no color issues but crashes when …

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Re: AnDosbox - need help

Posted on 2011-12-07, 17:18

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by digistorm

in DOSBox General

in DOSBox General

Forget it. DOSBox is fast on any Intel or AMD based system due to the fact that the emulated hardware closely resembles the real hardware. Both real and virtual cpu speak the same language. With mobile phones and other systems (PowerPC for example) the cpu speaks a completely different language, so …

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

Posted on 2011-09-17, 12:53

by

by digistorm

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

Posted on 2011-09-17, 07:35

by

by digistorm

in DOSBox Development

in DOSBox Development

What NY00123 means is that the original speaker has some inertia that causes the sharp edges to soften. You could also describe it this way: the physical speaker acts as an bandpass filter because it cannot follow very fast changes, and it is too small to reproduce very low frequency's. Most PC …

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Re: Should a DOS application be able to crash DOSBox?

Posted on 2011-09-08, 13:12

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by digistorm

in DOSBox Development

in DOSBox Development

Ok, relax everybody... I think I've elaborated quite a bit that I did not expect anybody to change the way DOSBox works or to put a lot of work in something that is not worth the effort. I just wanted to know if I stumbled upon something that was worth checking out for the developers. From the way …

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Re: Should a DOS application be able to crash DOSBox?

Posted on 2011-09-07, 07:38

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by digistorm

in DOSBox Development

in DOSBox Development

because an emulator simulates another machine, and the software that you run runs in a closed environment. The simulated environment can die, but the shell around it (the emulator) should not. Just as we don't expect our browser to crash from a bad plugin or our operating system crash from bad …

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Re: Should a DOS application be able to crash DOSBox?

Posted on 2011-09-06, 22:43

by

by digistorm

in DOSBox Development

in DOSBox Development

Well, my question was really if a crashing DOSBox is expected behavior. And with crashing I thus mean ungracefully closing of the program or stopping to respond. And apparently that is the case. I have never seen any other emulator do this by design, so my question seems reasonable to me. I don't …

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Should a DOS application be able to crash DOSBox?

Posted on 2011-09-03, 15:18

by

by digistorm

in DOSBox Development

in DOSBox Development

If not, then I have discovered a bug ;) I am running DOSBox 0.74 and with certain demo scene demo's, it crashes on load of the executable. With 0.73 it hangs (meaning the DOSBox window doesn't respond to input). Is there any interest in demo code making DOSBox crash, or does it fall outside the …

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Re: Question about sound and it's effect on performance.

Posted on 2010-11-27, 21:46

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by digistorm

in DOSBox Development

in DOSBox Development

That is true, of course. But skilled programmers or musicians could make wonderful things with it. Compare it with the Amiga which had only 4 wave channels. There may be a lot of crap music, but also some really nice crafted pieces of art. I myself consider it more versatile then a general MIDI box. …

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Re: Question about sound and it's effect on performance.

Posted on 2010-11-09, 10:09

by

by digistorm

in DOSBox Development

in DOSBox Development

As a GUS owner (I have a "reference system" still running ;)) I can say a few things about it: It was one of the first wavetable cards on the consumer market (1992) so it certainly beat the AWE32. It is capable of playing MIDI with the correct software loaded (TSR that eats up memory). Essentially …

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Re: PC Speaker Passthrough?

Posted on 2010-11-08, 17:22

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by digistorm

in DOSBox Development

in DOSBox Development

Why would you want to use your onboard speaker? If you want authenticity, it will not help you because the current onboard buzzers are no comparison to the tiny-but-real speakers in the PCs of the old days. If you really want to, you can measure the frequency response of a typical PC speaker of the …

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