Re: VGA Capture Thread

Posted on 2020-10-24, 11:41

by

by elianda

in Marvin \ Video

in Marvin \ Video

If you capture YUV the OSSC doubling is a good option. If you capture RGB it is on your side where you do the color space conversion. As you upscale for youtube anyway, it makes sense to already provide the encoder with the RGB data and let it do the conversion. Aspect ratio: In a general case there …

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Re: VGA Capture Thread

Posted on 2020-10-21, 09:34

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by elianda

in Marvin \ Video

in Marvin \ Video

I use Epiphan cards and made some years ago a tool for such optimizations. It is much easier to tune the stuff when you have the numbers at hand and don't have to judge some noise in screenshots. It was posted in this thread here: https://www.vogons.org/viewtopic.php?f=63&t=26661&p=370770#p370770 …

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Re: VGA Capture Thread

Posted on 2020-09-16, 09:42

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by elianda

in Marvin \ Video

in Marvin \ Video

AFAIR there are no 4K capture cards that capture RGB. (Correct me if you know one) Every flat panel screen samples 400p modes as 720, so e.g. 320x200 is displayed wrong since it requires sampling with 640 pixels.

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Re: S3 Virge DX 4MB vs Matrox Mystique 4MB

Posted on 2020-08-31, 16:59

by

by elianda

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What is much more important for DOS is that the Virge has support for low-res VESA modes as well as 15 bit modes (but not 24 bit). The Matrox just support 8/16/32 bit starting at 640x480. That is an interesting information! Is that why my onboard-mystique does not work in many demos with special 15 …

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Re: Cirrus Logic Eagle II 8-bit VGA card

Posted on 2020-08-04, 20:23

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by elianda

in Marvin \ Video

in Marvin \ Video

I recently got a similar card, long, 8 bit ISA, with CL-GD520/540. Thanks for the DIP switches, that helped. My card has an 32kB Eagle II BIOS V2.12 from 1988. When switched to MDA the BIOS size shrinks to 4 kB. If there is interest I can upload the image.

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Re: The comprehensive list of all modern reproductions of vintage sound cards

Posted on 2020-07-22, 22:37

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by elianda

in Marvin \ Sound

in Marvin \ Sound

In the document you linked for the 82C611/12 on page 12, section 1.4 is stated that the chip does not support matched memory cycles. So it most likely will also have issues in a Model 70 or 80 in a combination with a memory expansion card that utilizes MMC. Still, an actual test brings clarity. I …

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Re: The comprehensive list of all modern reproductions of vintage sound cards

Posted on 2020-07-22, 15:28

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by elianda

in Marvin \ Sound

in Marvin \ Sound

@tex elec Shameless copy here from the plaid-bib thread: Interesting, however it is somewhat unclear to me from the description if it works in a faster MCA machine like a Model 80 and if the lockup issue in combination with memory expansion cards is resolved. The description does not mention any of …

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Re: MCA Adlib card -- just need pictures

Posted on 2020-07-22, 09:38

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by elianda

in Marvin \ Sound

in Marvin \ Sound

Interesting, however it is somewhat unclear to me from the description if it works in a faster MCA machine like a Model 80 and if the lockup issue in combination with memory expansion cards is resolved. The description does not mention any of these points that came up here in the thread.

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Re: VGA Capture Thread

Posted on 2020-07-09, 11:00

by

by elianda

in Marvin \ Video

in Marvin \ Video

What is quite odd is that it cuts off left and top. Like it samples the full screen and then output only the lower right part of it. Usually if a device just samples 350 lines of a 400 line resolution only the top 350 lines are displayed.

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Re: DScaler 4.2.3a

Posted on 2020-07-06, 16:02

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by elianda

in Release Announcements

in Release Announcements

First of all I just did a a few small contributions to the already existing DScaler project with changes that adressed some of my own points. Though, it is good to hear that it works good for your application too. PVR3000 Deluxe: It mainly depends what driver API the card offers. DScaler supports …

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Re: General Problems with analog VGA on TFTs and Converters

Posted on 2020-06-09, 09:52

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by elianda

in Marvin \ Video

in Marvin \ Video

I own an OSSC myself and appreciate the flexibility. (On a side note: I miss support in the OSSC for 1024x768 at 43 Hz interlaced, though I am not sure of the OSSC hardware would be capable to convert this mode) The 60 Hz limitation/downconversion of most converters is a bit odd. If you look at …

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Re: General Problems with analog VGA on TFTs and Converters

Posted on 2020-06-09, 09:16

by

by elianda

in Marvin \ Video

in Marvin \ Video

Thats summarizing the general problem. While TFTs sampling at 720x400 is targeted for text mode, most of the games use some 640 dividable horizontal resolution. There 720 pixel sampling is suboptimal as it introduces a moiree effect in horizontal direction. I have not found a TFT with VGA input yet …

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Re: General Problems with analog VGA on TFTs and Converters

Posted on 2020-06-08, 15:03

by

by elianda

in Marvin \ Video

in Marvin \ Video

So are there TFTs or VGA to HDMI converters out there that allow to choose the correct sampling?

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General Problems with analog VGA on TFTs and Converters

Posted on 2020-06-07, 15:12

by

by elianda

in Marvin \ Video

in Marvin \ Video

Hello, I would like to discuss some general problems that TFTs and VGA to HDMI/DVI Converters show with analog VGA Signals. So default text mode is 720x400 70 Hz. The 720 horizontal originates from 80 chars with 9 pixels each. Here the resolution and the mode matches. However other low res graphics …

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Re: Release Announcements Consolidation

Posted on 2020-06-07, 11:16

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by elianda

in Release Announcements

in Release Announcements

The kxDrivers link has moved to github: https://github.com/kxproject/kX-Audio-driver-binaries

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Re: MS-DOS DoubleSpace and DriveSpace, anyone use it?

Posted on 2020-06-04, 20:45

by

by elianda

in Marvin \ Software

in Marvin \ Software

That I did not know. I'm not finding any reference to this after a quick search. Could you point me in the right direction? In any case, I thought the whole purpose was to reduce needed space in order to keep people from having to buy a larger disk. If they have to buy a second disk to use for non- …

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Re: MS-DOS DoubleSpace and DriveSpace, anyone use it?

Posted on 2020-06-04, 19:06

by

by elianda

in Marvin \ Software

in Marvin \ Software

Good memory managers had native support for the most common disk compression drivers and can load them nearly fully to XMS. So the memory argument is only an issue if you have a game that requires real mode and that game was stored by yourself on the compressed disk. And the solution to that is …

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Re: MS-DOS DoubleSpace and DriveSpace, anyone use it?

Posted on 2020-06-04, 11:11

by

by elianda

in Marvin \ Software

in Marvin \ Software

I use stacker 4 on one of my 386DX-40. Nowadays it is more of a technical interest. I think the argument with games and pre-compressed assets is correct but not a good choice. The most gains of the compression are gained with files from Windows 3.x which typically compress really good. A good …

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Re: Why didn't anyone tell me about the SGM v2.01 soundfount ?

Posted on 2020-05-31, 20:34

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by elianda

in Marvin \ Sound

in Marvin \ Sound

SBLIve! can load soundfonts larger than 64 MB when using the kx drivers: https://github.com/kxproject/kX-Audio-driver-binaries

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Re: VGA Capture Thread

Posted on 2020-05-07, 11:06

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by elianda

in Marvin \ Video

in Marvin \ Video

The AV.io HD most likely is also supported by my alignment tool, as it is based on the same driver backend.

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