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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 2022-05-06, 09:41

Very interesting info @rasz_pl, those are some pretty good features that can be used to optimize AVGA / Cirrus Logic cards. I've looked into datasheets from newer models (like the 5426) and those also have those features, so I can test them since I don't have any 5402 card. I wonder if UniVBE …

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

Posted on 2022-04-26, 16:10

by ViTi95

in Release Announcements

https://www.youtube.com/watch?v=Op2tr2lGK6Y IBM Monochrome Display Adapter ¯\_(ツ)_/¯ EDIT: FastDoom 0.8.12 released, please @maxtherabbit try it, I hope it fixes automatically the issue with the VGA card. If it still doesn't work fine, try the command line parameter "-fixDAC" - New video mode: IBA …

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

Posted on 2022-04-20, 20:20

by ViTi95

in Release Announcements

Thanks for the idea Gmlb256 !! I've updated the code to detect if the video card is compatible with the REP OUTSB palette set using the same method as Wolfenstein 3D, but I've mantained the command line parameter to force the use of the slower code in case the autodetection fails.

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

Posted on 2022-04-20, 13:18

by ViTi95

in Release Announcements

The next release will include a fix for this issue (via command line parameter). Some video cards / DACs don't like setting the VGA palette via REP OUTS instruction. The REP OUTS instruction is faster but in some cases avoids checking if the port is ready to write more data, that's why it fails on …

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

Posted on 2022-04-18, 16:38

by ViTi95

in Release Announcements

Try the 0.7 release, that was the last one with unoptimized palette set routines. Also what DOOM WAD and version are you using?

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

Posted on 2022-04-18, 08:39

by ViTi95

in Release Announcements

Does the same happen on older releases @maxtherabbit?? I've never seen that bug on the Mode Y executable. I'll add an issue and try to fix it, I guess the bug it's related to the change palette function, it's very optimized and maybe causes troubles with Western Digital videocards. Also, have you …

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

Posted on 2022-04-12, 06:22

by ViTi95

in Release Announcements

A little mistake when I wrote the changelog, the optimized ATI Small Wonder mode has a resolution of 640x200 instead of 640x400. @AirIntake, the base resolution of the ATI mode is 320x200, but it's using scaling techniques to get more colors from the basic 16 ones (dithering 2x1).

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

Posted on 2022-04-11, 19:40

by ViTi95

in Release Announcements

New release! FastDoom 0.8.11: Changelog: - Optimized backbuffered video modes: Hercules, CGA B&W, Plantronics ColorPlus, EGA, ATI 640x200 - Small optimization on multiple modulo operations, sound code and gameplay code - Fixed music initialization volume (@deat322) - Fixed mouse move fordward button …

Re: 8-bit VRAM write on a 16-bit ISA graphics card, fast or slow?

Posted on 2022-03-15, 12:53

by ViTi95

in Marvin \ Video

There are no penalties, but the bandwith doing 8-bit MOVs instead of 16-bit is just half. It's not that easy. A 16 bit graphics card need not accept a 16-bit cycle under all circumstances. If the card feels like doing 8-bit access only in a certain video mode, it is free to do so. A lot of non-FIFO …

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

Posted on 2022-03-14, 21:12

by ViTi95

in Release Announcements

New release! FastDoom 0.8.10: Changelog: Added new video modes, EGA cards also deserve some love - FDOOME16.EXE => FastDoom EGA 160x100 - FDOOME36.EXE => FastDoom EGA 80x100 (122 pseudocolors) - FDOOMT43.EXE => FastDoom 80x43 16 colors text mode (only EGA cards) - FDOOMT86.EXE => FastDoom 80x43 16 …

Re: 8-bit VRAM write on a 16-bit ISA graphics card, fast or slow?

Posted on 2022-03-14, 08:05

by ViTi95

in Marvin \ Video

There are no penalties, but the bandwith doing 8-bit MOVs instead of 16-bit is just half. You can check this behaviour with some benchmark (X-VESA, or my new benchmark https://github.com/viti95/V95bench)

Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Posted on 2022-03-10, 21:47

by ViTi95

in Marvin \ Sound

Wow, this is insane. I have some SB cards with the CSP, and can provide testing if required. My idea is to accelerate the sound engine in FastDoom, mainly the stereo separation and volume calculations. Maybe this is the first time an ISA card could be used as an accelerator on old systems.

Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Posted on 2022-03-10, 08:55

by ViTi95

in Marvin \ Sound

I'm also very interested on this topic, wonder if it's possible to program directly the CSP and use it as a coprocessor. Saw some days ago someone selling a ISA devkit card for the ST18932, but not very cheap. https://www.ebay.es/itm/202676573054?ssPageName=STRK%3AMEBIDX%3AIT EDIT: You can find also …

Re: Tell us which videogame sounds or voice-clips are the most burned into your brain for life

Posted on 2022-03-09, 09:16

by ViTi95

in Milliways

- Damn, those alien bastards are gonna pay for shooting up my ride. (Duke Nukem 3D) - Power armor is for pussies. (Duke Nukem Forever) - YEEEEEEEEEEEEEEHAAAAAAAAA (Redneck Rampage) - Does the pope shit in the woods? (GTA San Andreas) - ALPHA 1: mission-critical craft! UNDER attack! (Tie Fighter) - …

Re: Any interest in a SDL-less "abstract" port?

Posted on 2022-02-28, 16:53

by ViTi95

in DOSBox Development

Also porting SDL 1.x code to SDL 2.0 isn't that hard, I've done it for the SDL1 port of Clanbomber2 and it wasn't much code to change at all. And the benefits were incredible, hardware acceleration made it go much faster.

Re: V95Bench, new benchmark for GPUs on DOS systems

Posted on 2022-02-23, 15:43

by ViTi95

in Release Announcements

BitWrangler wrote on 2022-02-23, 14:35: Is it not using standard output where you can just pipe it to a file? Yes, but it uses interactive menus, so that doesn't work when piping to a file. I'll add an option to output the results to a file.

Re: V95Bench, new benchmark for GPUs on DOS systems

Posted on 2022-02-23, 11:30

by ViTi95

in Release Announcements

Yeah, the latest version i've uploaded is the 0.0.3, it includes all new 16-bit and 32-bit write to VRAM and read from VRAM benchmarks. It's still a pre-release, since the UI is still horrible, and missing some important functions like export to file results. https://github.com/viti95/V95Bench/ …

Re: Any interest in a SDL-less "abstract" port?

Posted on 2022-02-22, 14:57

by ViTi95

in DOSBox Development

Compiler optimizations and a faster backbuffer to VRAM algorithm will make it much faster. Avoid at all costs transfer huge amounts of data to the video card, a 8-bit palletized mode will always be faster than a 15 o 24 bit mode. Also precalculated LUTs for backbuffer format conversions give mayor …

Re: Is there Anyone "Overpaying" for Hardware and Proud of it? Well, maybe not Proud, but...

Posted on 2022-02-22, 14:45

by ViTi95

in Marvin \ General Old Hardware

I've recently overpaid for a Sigma Designs Color 400 (ISA 8-bit CGA extended card) on eBay, absolutely not proud of that, but it's the only way to get real hardware to develop on. Yeah, it's possible to develop using emulators, but an emulator will never be exactly the same as the original hardware …

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

Posted on 2022-02-18, 12:52

by ViTi95

in Release Announcements

The shareware IWAD is supported (version 1.9). It has to be renamed though: * DOOM.WAD -> DOOM Registered (3 episodes) * DOOM1.WAD -> DOOM Shareware (1 episode) * DOOMU.WAD -> Ultimate DOOM (4 episodes) * DOOM2.WAD -> DOOM II * PLUTONIA.WAD -> Final DOOM The Plutonia Experiment * TNT.WAD -> Final …

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

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

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

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

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

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

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

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

Re: 8-bit VRAM write on a 16-bit ISA graphics card, fast or slow?

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

Re: 8-bit VRAM write on a 16-bit ISA graphics card, fast or slow?

Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Re: Tests/Info welcome: Reverse engineering the SB16 ASP/CSP

Re: Tell us which videogame sounds or voice-clips are the most burned into your brain for life

Re: Any interest in a SDL-less "abstract" port?

Re: V95Bench, new benchmark for GPUs on DOS systems

Re: V95Bench, new benchmark for GPUs on DOS systems

Re: Any interest in a SDL-less "abstract" port?

Re: Is there Anyone "Overpaying" for Hardware and Proud of it? Well, maybe not Proud, but...

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