Re: Aztech Waverider Pro 32-3D

Posted on 2021-05-03, 15:28

by

by elianda

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

betamax80 wrote on 2021-05-03, 14:42: Would anyone like to host the former Aztech FTP content? I downloaded it in 2017 thinking it might dissappear at some point - it did. It's around 1Gb in size. You mean like: ftp://retronn.de/mirrors/ftp.aztech.com.sg/ ?

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Re: A brief comparison of 386 FPUs

Posted on 2021-04-26, 10:44

by

by elianda

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Are there applications known that make use of the specific fast operations in certain FPUs? Like the 4x4 matrix transformation in the IIT FPUs?

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Re: Which is the best and most memory efficient CD-driver?

Posted on 2021-03-31, 23:01

by

by elianda

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

DOS CDROM stuff is all PIO... I'am pretty sure thats incorrect. Just look at the Bus Master driver package from Triones for Intels Triton chipsets. Or adaptecs CD driver for their scsi cards, or early CD-ROMs with proprietary connector. I attached some readme from the high speed cd-rom driver …

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Re: SoftMPU project needs your help! (game & sound card testing)

Posted on 2021-03-18, 13:00

by

by elianda

in SoftMPU

in SoftMPU

To be more specific: SoftMPU works if the port access to the MIDI port is done from V86 mode. Dos Extenders like DOS4GW also have the feature that sub routines can be called from non-protected mode, which might be the case for MSS.

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Re: Which is the best and most memory efficient CD-driver?

Posted on 2021-03-14, 12:13

by

by elianda

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The more general question is, what features do the smaller drivers drop to have such a small memory footprint. This is not well documented mostly. e.g. Kanji file structures, CD-ROM XA, CD-I...

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Re: Appian Graphics Gemini PCI - S3 Savage MX 16MB

Posted on 2021-01-17, 15:04

by

by elianda

in Marvin \ Video

in Marvin \ Video

So what are actually the PCI Vendor / Device IDs of your card? Does it also use the 86C290 chipset? Since there was the question about benchmarks here, I did a few with the Spectrah Dynamics Inc LD-S370 Savage MX https://retronn.de/imports/hwgal/hw_s3_savage_mx_spectrah.html See the second …

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Re: DScaler 4.2.3a

Posted on 2020-12-19, 14:22

by

by elianda

in Release Announcements

in Release Announcements

Hmm, I have not touched the video recording part, but maybe progressive output somehow interfers with that. I have to look into this. What would be the advantages for capturing with DScaler when going from AVI to MKV? The only thing I can imagine is writing the DAR to the container.

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Re: VGA Capture Thread

Posted on 2020-11-13, 10:44

by

by elianda

in Marvin \ Video

in Marvin \ Video

I don't know, 720 x 400 would show as 4:3 if you don't have a choice of display, but I personally never end up squishing it when viewing in a capture window. By the way, have you done testing on the effects of interpolated scaling on temporal image quality on YouTube? I've noticed it tends to end …

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Re: DVD accelerators compared

Posted on 2020-10-27, 22:46

by

by elianda

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am not 100% sure, but ftp://retronn.de/driver/Creative/PC-DVD_DXR2/ and this player ftp://retronn.de/driver/Creative/DVD_Player_3.50/

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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

by

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

by

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

by

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

by

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

by

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

by

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

by

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

by

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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