Re: ATI Small Wonder technical info

Posted on 2021-09-28, 13:08

by

by ViTi95

in Marvin \ Video

in Marvin \ Video

Great, the gsdemo1.c file describes how to initialize the 640x200 mode and the PC10/PC20 Advanced Graphics Adapter manual the vram layout. And I've got one of those ATI Small Wonder video cards, so i'm pretty sure that the next release of FastDoom will include native support for it (just finished …

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Re: ATI Small Wonder technical info

Posted on 2021-09-28, 07:08

by

by ViTi95

in Marvin \ Video

in Marvin \ Video

I'm also interested in this topic, specially the 320x200 and 640x200 16 color modes for the ATI cards. Don't know if the 320x200 is the same mode that uses the Plantronics Colorplus or it's a different one. PickledDog recently added support for the Plantronics Colorplus to FastDoom, you can check …

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Re: EISA Graphics / Video Cards

Posted on 2021-09-24, 12:23

by

by ViTi95

in Marvin \ Video

in Marvin \ Video

So I ran some benchmarks between this and an ET4000 ET4000 DOOM realtics - 1284/3910 Compaq EISA realtics - 1284/3927 LOL. Doom cannot benefit from EISA bus, as it uses single 8-bit writes to the video card and the bus frequency it's exactly the same as the ISA bus. The only way to test if it's …

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Re: What is the main bottleneck in dos programming?

Posted on 2021-09-16, 08:28

by

by ViTi95

in Marvin \ Software

in Marvin \ Software

That's too much RAM usage for a DOS game, think that games like DOOM just runs on 4MB. Reduce whenever possible the data types to smaller ones, and be very careful with dynamic memory allocation (free data whenever possible, and it's better to use static resources). And very important, memory leaks …

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Re: Video Seven CL-GD410/420 VGA BIOS ROM

Posted on 2021-09-16, 07:13

by

by ViTi95

in Marvin \ Video

in Marvin \ Video

I've got one Video Seven like this but the layout is a bit different and the video chips are the models GD510/GD520. I can dump the VGA BIOS but don't know if it could work with your model 😖

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Re: S3 ViRGE VLB project (or " Making a Concurrent for Creative 3D Blaster VLB" )

Posted on 2021-09-16, 05:31

by

by ViTi95

in Marvin \ Video

in Marvin \ Video

I'm also interested 😀

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Re: SAA1099 as 4-bit DAC and CMS/GameBlaster digital sound output

Posted on 2021-09-13, 14:32

by

by ViTi95

in Marvin \ Sound

in Marvin \ Sound

This is great! The code looks very simple and sounds pretty decent, maybe I can add support for FastDoom with this technique. One little question, what's the maximum frequency the GameBlaster supports? EDIT: Another question, does this work on DosBox?

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Looking for info about the Yamaha V6363

Posted on 2021-09-07, 21:05

by

by ViTi95

in Marvin \ Video

in Marvin \ Video

Hi everyone! I've found one ISA card on my collection that hides some special features that I want to test, and it's based on the Yamaha V6363 IC. It's a CGA/MDA/Hercules compatible card, with the following extra supported modes (all the information comes from the original datasheet http://www. …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-09-05, 11:41

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by ViTi95

in Release Announcements

in Release Announcements

Another update, I've checked that is possible to extend the CGA 160x100 16 color mode on VGA cards to 160x200 or even 160x400. I've never seen this before, but I think it's a pretty good mode. On a Trident ISA 8-bit VGA card is possible to update the whole sceen at more than 40 fps (with a fast cpu …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-09-03, 16:55

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by ViTi95

in Release Announcements

in Release Announcements

Well I wasn't wrong when I said the EGA video cards are slow. This is on a Trident ISA 8-bit VGA card (my MCE2VGA has stopped working so I cannot use an EGA card, this is the closest one) https://www.youtube.com/watch?v=uO0NSsDEqC8

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-09-03, 09:08

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by ViTi95

in Release Announcements

in Release Announcements

Really nice port, ViTi95. Covox support made my day. Is there a chance to add Sound Blaster direct mode (no DMA) support? In particuar this could be useful for PCMCIA sound cards that lack DMA. Here is what SB hardware programming guide has to say about it direct mode.png I guess it's easy to …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-09-03, 00:17

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by ViTi95

in Release Announcements

in Release Announcements

I've implemented ordered dithering (2x2) for the EGA 640x200 16 color mode. Still needs refinement, but I guess the result isn't that bad. This is a video running under DosBox-X, this weekend i'll test it on real hardware :D Edit: I did a mistake tonight (very late), here's the good one https://www. …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-08-30, 22:08

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by ViTi95

in Release Announcements

in Release Announcements

I did the test just with Amd 5x86 photo_2021-08-30_23-18-35.jpg Apparently the v0.8.4 is the fastest, but the difference is minimal at best. I guess the performance differences are in the margin of error. Sometimes the OpenWatcom compiler generates different executables even with minimal changes ( …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-08-30, 20:23

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by ViTi95

in Release Announcements

in Release Announcements

In the 0.8 release I made a mistake in an optimization that caused the buttons to behave incorrectly, I'm pretty sure that the fix made the game a little bit slower. Anyway the loss in performance is less than 1%, so it shouldn't be much noticeable.

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-08-25, 20:40

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by ViTi95

in Release Announcements

in Release Announcements

... The LUT idea works very well for dithering the B&W modes, since it avoids lot's of branches, so I guess it's also a good idea for 4-color and 16-color modes. For now I won't be doing anything very specific for CGA/EGA modes, since most of the 8-bit ISA cards aren't able to sustain good …

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Re: Improving Quake performance on POD83.

Posted on 2021-08-23, 11:23

by

by ViTi95

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can try https://github.com/goshhhy/486quake/releases for software rendering, there is an specific version for 586 processors that is faster than the original release

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Re: Why is Doom slow but Quake fast on my Tseng Labs ET4000?

Posted on 2021-08-17, 10:09

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by ViTi95

in Marvin \ Video

in Marvin \ Video

There are multiple reasons that make Doom slower on ISA cards compared to Quake on fast systems. The main difference on how both render the scene, is that Doom renders everything directly in the video card, while Quake uses a backbuffer in RAM memory and then copies that backbuffer to the video card …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-08-16, 09:13

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by ViTi95

in Release Announcements

in Release Announcements

Thanks for the idea @Gmlb256, the latest release (0.8.7) has those messages disabled. Didn't know it was possible to configure DOS/32A in so many ways!

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Re: The World's Fastest 486

Posted on 2021-08-06, 12:45

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by ViTi95

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just for curiosity, can anyone try the latest build of 486quake (https://github.com/goshhhy/486quake/releases/tag/1.09-r6) with any of those 200MHz 486s?

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-08-05, 11:05

by

by ViTi95

in Release Announcements

in Release Announcements

@Cyberdyne is right, it's a huge task as nearly all the code has to be rewritten (Doom was built with 32 bit registers in mind)

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