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

Posted on 2022-10-15, 16:38

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by ViTi95

in Release Announcements

in Release Announcements

Yeah a 486 would do a much better job, use one whenever possible. It's more than 2 times faster compared to the 386s usually.

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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 2022-10-15, 10:23

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by ViTi95

in Release Announcements

in Release Announcements

FreeDoom (Phase 1+2) has been tested on the new release and the crashes has been fixed. About the licensing, well I'm no expert in licensing (and really don't care much about it), but I'll take a look.

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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 2022-10-14, 23:35

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by ViTi95

in Release Announcements

in Release Announcements

New release! FastDoom 0.9 This is a major release since lot's of fixes were done. Here is the changelog: Fixed lot's of crashing bugs. May be a performance impact, but it's better than crashing the whole game. Huge thanks to @RamonUnch for discovering the issues, fixing them, and providing extensive …

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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 2022-10-14, 07:20

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by ViTi95

in Release Announcements

in Release Announcements

The low resolution EGA executables maybe are usable on a 386, fdoome16.exe (160x100 16-colors) and 80x100 (80x100 136 "colors") fdoome36.exe should work a little bit faster than the 320x200 EGA mode, since those modes avoid having to convert the screen from chunky to planar graphics, and the drawn …

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Re: 15 FPS Doom 2 with Pentium MMX 200

Posted on 2022-10-13, 20:42

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by ViTi95

in DOS

in DOS

The main issue here is that ISA card. Doom and Doom II render each frame directly on the video card, and that requires lots of bandwidth (not only to transfer pixels, but also lot's of OUT instructions are used to set video card registers). Framerate will be better on low quality on that ISA 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 2022-10-05, 11:38

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by ViTi95

in Release Announcements

in Release Announcements

Very interesting idea @wbc, yeah having mipmaps requires more memory, but could accelerate rendering quite a bit and make visuals better. It's true that I'm no expert in 3D graphics, so don't know if i'll be able to develop these ideas onto FastDoom (again, any help is always welcome)

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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 2022-10-03, 08:51

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by ViTi95

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AC97 1.x only supports 48 KHz operation, while in AC97 2.x additional frequencies are optional. The Apogee Sound System can do resampling in real time, so that's not a big issue. Right now I've been able to port the initialization process from the JUDAS library, next step will be make it sound …

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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 2022-09-28, 07:22

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by ViTi95

in Release Announcements

in Release Announcements

That setup looks really dope! Right now FastDoom development is a little slow, as I'm currently stuck trying to add AC97 and IBM XGA support. Next release will have some important bugfixes made by @RetroUnch, and some optimizations for ISA 8-bit cards. Also some fixes for the snow issue on original …

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Re: HDD Clicker - HDD Sound Simulator

Posted on 2022-09-22, 09:36

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by ViTi95

in Marvin \ Sound

in Marvin \ Sound

Is it possible to replace the buzzer with a relay? I want it to sound LOUD 😂

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Re: Jazz Jackrabbit waterfall effect?

Posted on 2022-09-16, 08:17

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by ViTi95

in PC Emulation

in PC Emulation

https://twitter.com/furan/status/156904368787 … 57de9uTYTrbzIow Here you can see the palette changes on Jack Jazzrabbit. As @leileilol said, just color changes + sprite alternate dithering.

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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 2022-08-31, 11:57

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by ViTi95

in Release Announcements

in Release Announcements

keropi wrote on 2022-08-30, 18:56: so... when voxels will be added? 😁 😁 😁 I guess someone will have to port LZDoom to DOS 😂😂

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

Posted on 2022-08-31, 07:44

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by ViTi95

in Marvin \ Sound

in Marvin \ Sound

I wonder how it's possible to get 8-bit PCM resolution on the SAA1099, if the volume registers are only 4-bit. I guess the idea is the same as for the SN76489: Lookup for 8-bit PCM A stream of 8-bit PCM data is read from ROM (one sample per byte) and used to look up a triplet of SN76489 attenuation …

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Re: Can anybody with AC'97 audio please help me test a DOS player? 😊

Posted on 2022-08-26, 18:29

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by ViTi95

in Marvin \ Sound

in Marvin \ Sound

Maybe I can help, I'm adding AC97 / HDA support to FastDoom using the codebase of the Judas library, and starting to learn how it works.

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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 2022-08-23, 07:54

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by ViTi95

in Release Announcements

in Release Announcements

Yep, also support for the Creative Music System (C/MS, also named GameBlaster), it can be used as an stereo 4-bit DAC for PCM sound. My balls hurt wrote on 2022-07-26, 04:02: Am i able to run doom mods? Yes, but not all mods will work. You have to test by yourself.

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Re: Area 5150: New IBM PC+CGA demo

Posted on 2022-08-22, 19:08

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by ViTi95

in Release Announcements

in Release Announcements

A question, how many VRAM bytes are you able to update on Area 5150 per frame without having snow?

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Re: Area 5150: New IBM PC+CGA demo

Posted on 2022-08-22, 14:51

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by ViTi95

in Release Announcements

in Release Announcements

Yep, it's a known bug in FastDoom CGA text based modes with the original IBM card (and clones). I will try to fix the CGA modes that use a backbuffer, since those only update the screen when everything is rendered in RAM.

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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Posted on 2022-08-22, 09:18

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by ViTi95

in Marvin \ Sound

in Marvin \ Sound

Hi, I'm also very interested on getting on of these Tandy Mini (or the bigger model). Is there any shop where I can buy one? The idea is to add support to FastDoom using it as a 4-bit? DAC

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Re: Area 5150: New IBM PC+CGA demo

Posted on 2022-08-22, 08:23

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by ViTi95

in Release Announcements

in Release Announcements

Well right now FastDoom supports the 160x100 CGA 16 color mode, and it's pretty fast (https://www.youtube.com/watch?v=_6Jft32G3ls). The idea is to bump the resolution to 320x200 and add color dithering, but as you said @reenigne, I guess this is way too much for older CPUs.

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Re: Area 5150: New IBM PC+CGA demo

Posted on 2022-08-21, 21:13

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by ViTi95

in Release Announcements

in Release Announcements

That would be really cool, I wonder if there is a way to convert a 320x200 8-bit color backbuffer to ASCII from Hell in realtime (that including dithering).

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

Posted on 2022-08-21, 20:40

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by ViTi95

in Marvin \ Sound

in Marvin \ Sound

Small update, maybe you're interested in this @Tronix. It's possible to generate stereo 4-bit DAC sound with the GameBlaster, just using the same idea but using each chip for left / right channels. Also you can make it faster by setting the amplitude register just once, and then updating the value …

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