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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 2023-04-05, 11:54

Quick'n'dirty ordered dithering 4x4 on FastDoom EGA 320x200. It shows promising results, what do you think VileR ? Filename dos4gw_002.png File size 20.54 KiB Views 2174 views File comment FastDoom EGA 320x200 ordered dithering 4x4 pic3 Filename dos4gw_001.png File size 14.88 KiB Views 2174 views …

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

Posted on 2023-04-04, 13:09

The mock-up you've created looks very very well. I already did some dither testing directly in the colormap, and the result was no-where near good, but I think is possible to do something similar: The copy from backbuffer to VRAM is devided into blocks (Status bar, messages, border...), so we can …

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

Posted on 2023-03-27, 20:36

In my testing dithering only looks fine when higher resolution than 320x200 is available, otherwise small fonts become barely readable. That's why only 640x200 and 640x400 video modes have 0rdered dithering, with 2-to-1 or 4-to-1 pixel ratio without distortion. I didn't put much effort into creating …

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

Posted on 2023-03-27, 07:53

Something i've been working on, Sigma Designs Color 400 support. 320x200 and 16 colors. It's possible to use 640x200 or 640x400 and 16 colors, but the card is already too slow, so no point on adding support for those. The VRAM layout is very similar to the Plantronics ColorPlus, but uses different …

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

Posted on 2023-03-15, 22:06

New release! FastDoom 0.9.4. Changelog: - PCM music support. Up to 44.1 KHz, 8-bit mono music. For now PCM music is stored in RAM, so more than 16Mb is recommended - Tandy 3-voice SN76489 sound support. Sound quality is nowhere near good, but can be improved - Sound frequency is now selectable (from …

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

Posted on 2023-01-31, 09:58

Well some news about the Apogee Sound System GUS code, I've asked Jim Dosé if there was any source code available that uses hardware mixing instead of software mixing: 2023-01-31 10_52_21-Victor Nieto en Twitter_ _Hi @jim_dose ! We've found out that the Apogee Sound S.png Sadly there is no source …

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

Posted on 2023-01-27, 21:36

Yeah there is a limitation with the Apogee Sound System, it doesn't like GUS devices with IRQ higher than 7. I've never looked into why exists this limitation, but the developers did it anyway: GetUltraCfg(&os); if (os.forced_gf1_irq > 7) { return (GUS_Error); } Even more they disabled the hardware …

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

Posted on 2023-01-25, 09:00

Just tested with OPTI930, everything is ok, -reverseStereo option reverses the channels correctly. I admire how quickly you solve problems. Thank you. Great to hear it's working now. I've been developing this project for so long that even on vacation without my laptop I already knew how to solve …

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