Re: Video Upscalers for VGA - Any recommendations?

Posted on Yesterday, 20:45

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by clb

in Marvin \ Video

in Marvin \ Video

I am specifically looking for an upscaler that can deal with CRT emulation features like Aperture grill emulation, pixel bloom, scantiness, etc. These are sophisticated features that require understanding from multiple domains, e.g. electrical engineering manufacturing and design, signal processing …

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Re: CRT Terminator Digital VGA Feature Card ISA DV1000

Posted on 2024-12-06, 20:09

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by clb

in Release Announcements

in Release Announcements

Take a look at Alley Cat, especially the fish bowl level. If I remember correctly, on my first VGA card, that game changed the border color to show how much air the cat has left before drowning. With CGA register-level compatibility enabled, the color of the cat changes as well or instead of the …

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Re: CRT Terminator Digital VGA Feature Card ISA DV1000

Posted on 2024-12-06, 10:22

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by clb

in Release Announcements

in Release Announcements

Tested the border crop feature. Works. Cool - while implementing that it did make me wonder if there were ever any games that would do something with the border, e.g. animate/flash it red or some other color when player was hit. But can't recall any game doing anything like that. The only game I …

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Re: CRT Terminator Digital VGA Feature Card ISA DV1000

Posted on 2024-12-05, 20:33

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by clb

in Release Announcements

in Release Announcements

I think I got the EVGA XR1 capture box when doing R&D on how CRT Terminator behaves on different capture devices, but now I can't quite locate it anywhere. Too much hardware lying around everywhere I guess. :/ As the latest update, I re-did the OBS video captures with correct OBS settings to avoid a …

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Re: Good 4:3 LCD Monitor

Posted on 2024-12-04, 22:48

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by clb

in Marvin \ Video

in Marvin \ Video

Meanwhile i checked Aten VC160 with freesynch monitor, at bios boot RAM check(SS7 machine with Geforce 3) monitor OSD check reports 60 Hz Err, sorry, I mixed up my memory. SCROLL.EXE was actually 320x240 @ 60 Hz (It uses Mode X) and not 70Hz. So SCROLL.EXE does not show 70 fps content. I added …

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Re: Good 4:3 LCD Monitor

Posted on 2024-12-03, 23:22

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by clb

in Marvin \ Video

in Marvin \ Video

Many of the older panels can sync to 70-75Hz signals, but they will frameskip down to 60Hz. So the real test after setting up such a 70Hz video mode is to run some content that manages to update the frame at 70fps, to see if the display is skipping frames, or if it is actually displaying all the …

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Re: CRT Terminator Digital VGA Feature Card ISA DV1000

Posted on 2024-12-03, 21:47

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by clb

in Release Announcements

in Release Announcements

I think it would be a good idea if there was a version of the CRT Terminator that outputted SDI for use with capture cards Thank you for this idea, it is greatly appreciated. At this point, we're focusing on "maturing" all the documentation and software and are not planning new hardware iterations. …

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Re: Lossless and pixel perfect video capture of DOS 70 Hz 320x200?

Posted on 2024-12-03, 21:36

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by clb

in Marvin \ Video

in Marvin \ Video

you end up getting incorrectly interlaced frames when you're trying to capture from a console that is outputting a progressive signal because the card didn't have time to switch to progressive sampling before it had to start outputting frames... Yeah, the plot thickens, as I am seeing what seems …

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Re: Good 4:3 LCD Monitor

Posted on 2024-12-03, 09:57

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by clb

in Marvin \ Video

in Marvin \ Video

IM a bit lost if Freesynch and Gsynch monitor compatibility means that monitor can run on any requested refresh rate from 30 to max (so 70 or 72 is included) and even if yeah, if it needs some driver to make it happen or its only monitor thing. The idea of FreeSync and G-Sync is to allow the HDMI …

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Re: Good 4:3 LCD Monitor

Posted on 2024-12-02, 20:38

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by clb

in Marvin \ Video

in Marvin \ Video

Do you think that even FreeSync monitors down-convert any legacy VGA display modes to 60Hz, even though they could display 72Hz natively? Does anybody here have the equipment on hand to test this? Maybe if aspect ratio and image quality are not a concern, and the only concern is for refresh rate. I …

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Re: Good 4:3 LCD Monitor

Posted on 2024-12-02, 12:05

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by clb

in Marvin \ Video

in Marvin \ Video

Fully agree, you hit all the relevant points on observations about refresh rate. Most older LCD displays (that were built in the era when 4:3 LCDs were still a thing) did not actually support 70Hz inputs, but frameskipped such inputs to 60Hz, creating the stutter. Many modern LCDs do accept up to 75 …

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Re: CRT Terminator Digital VGA Feature Card ISA DV1000

Posted on 2024-11-27, 23:58

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by clb

in Release Announcements

in Release Announcements

Actually, gave that scheme a go at https://github.com/juj/crt_terminator/commit/cd632b4b9aa0d07c9a49b221f4e5d63bff8365b7 It totally works as well, and based on the PC speaker "sound(); nosound();" debugging, the workaround tends to trigger less often than the previous workaround code I linked. I …

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Re: CRT Terminator Digital VGA Feature Card ISA DV1000

Posted on 2024-11-27, 22:08

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by clb

in Release Announcements

in Release Announcements

That's very clever. Could work as well for sure. Makes for interesting testing this weekend, I think 😀

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Re: CRT Terminator Digital VGA Feature Card ISA DV1000

Posted on 2024-11-27, 21:26

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by clb

in Release Announcements

in Release Announcements

Yeah, that is correct. The PALTSR approach is fundamentally fallible that way, and guarantees to be working only if the original game gates palette uploads inside an interrupts disabled block. I did run tests way back to check on the "do VGA cards actually apply R/G/B palette colors after every …

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Re: Lossless and pixel perfect video capture of DOS 70 Hz 320x200?

Posted on 2024-11-27, 10:55

by

by clb

in Marvin \ Video

in Marvin \ Video

But they are an analog capture card so you won't get the frame buffer directly. Still, you could capture in true color and adjust to your liking. Oh I see. To clarify, what we are doing here is something completely different. In this case, the original lossless source material is preserved fully …

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Re: Lossless and pixel perfect video capture of DOS 70 Hz 320x200?

Posted on 2024-11-26, 18:33

by

by clb

in Marvin \ Video

in Marvin \ Video

you end up getting incorrectly interlaced frames when you're trying to capture from a console that is outputting a progressive signal because the card didn't have time to switch to progressive sampling before it had to start outputting frames... Yeah, the plot thickens, as I am seeing what seems …

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Re: Lossless and pixel perfect video capture of DOS 70 Hz 320x200?

Posted on 2024-11-26, 18:29

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by clb

in Marvin \ Video

in Marvin \ Video

This is something that has not been possible to do before. I was under the impression you could do it in the 2010s with the VisionRGB-PRO ($20) + VCS (free) combo. Reading https://www.vogons.org/viewtopic.php?t=59015 suggests you are the author of that project. It is absolutely fantastic that you …

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Re: Lossless and pixel perfect video capture of DOS 70 Hz 320x200?

Posted on 2024-11-26, 16:35

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by clb

in Marvin \ Video

in Marvin \ Video

Are you sure it's OBS? You can configure it to capture totally lossless without compression and see the result. It will be chop-fest but you can judge the quality on any single frame. If it's still showing some compression artifacts, then the issue is from the source. If the artifacts are gone, …

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Lossless and pixel perfect video capture of DOS 70 Hz 320x200?

Posted on 2024-11-26, 16:07

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by clb

in Marvin \ Video

in Marvin \ Video

Hey all, it has been a recurring topic here at Vogons to ponder how to capture non-60Hz DOS VGA content and how to do pixel perfect captures of DOS games. On this front, I would like to showcase a recording that I made from a real 486 PC playing the fantastic Foray in the Forest Commander Keen …

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Re: OSSC Pro and VGA "tweaked" modes

Posted on 2024-11-26, 10:16

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by clb

in Marvin \ Video

in Marvin \ Video

Oh right, gotcha. Yeah, would be interesting to see a short review of Arcooda, haven't seen that before.

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