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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 Yesterday, 05:37

Edit: Do exist any ISA video card that supports LFB? The only card I have that is supposed to support it is a Cirrus Logic GD-5429, but UniVBE doesn't enable it at all (even with less than 16Mb of RAM). The same motherboard works fine with a GD-5426 and LFB enabled. Maybe someone here can try this …

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

Posted on 2021-06-02, 22:37

I guess some video cards optimizes internally the way they draw the framebuffer in VBE2 modes compared to mode 13h, even in banked modes. VGA modes have lot's of quirks and internal registers that maybe are not needed in VBE2 modes. They sure do, but 13h is the most basic no thrills mode. I just …

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

Posted on 2021-06-01, 17:13

thats 9 fps on that vid; 36 vs 37 fps btw is there any graphics card that will do the copying from buffer to screen for us? no, but its possible ones sharing RAM with CPU (intel 810 on really bad boards without additional ram?) could be faster when skipping buffer and rendering in 13h/vesa directly …

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

Posted on 2021-06-01, 08:53

VBE 2.0 .....in some cases could be faster. https://www.youtube.com/watch?v=7PjA6PfyWW8 1 fps difference on fast 486, where is that speed coming from? I looked at the code and you are doing everything (well, almost, the code on github looks older, no I_FULLSCRN/I_FULLVIEW/I_STATBAR for vesa yet, …

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

Posted on 2021-05-29, 03:40

Another crazy idea: Modern games use Dynamic resolution scaling (DRS) and Variable Rate Shading (VRS). FastDoom could have a mode where it monitors frame render times and dynamically switches between full, half and quarter resolution detail modes to keep FPS above certain number, like for example 20 …

Re: Doom vs Heretic VGA performance difference

Posted on 2021-05-20, 22:14

Yes, what Im getting at is where is the cutoff making mode Y a detriment. I would consider Cyrix Cx486DX 33MHz a slow 486, yet here it is already doing better. Another interesting experiment you could implement would be 13h low detail mode where you write words at a time to VGA memory and compare …

Re: Doom vs Heretic VGA performance difference

Posted on 2021-05-20, 15:13

How much of the difference is due to vsync? I assume fdoomy is triple buffered and 13h raw non vsynced framebuffer? Now the question is what were the hardware combinations that really benefitted from mode Y? And was Mode Y an error on ID part? Why would they keep at it for Doom 2?

Re: Are Voodoo graphics card THAT good ?

Posted on 2021-05-11, 17:06

Where was that? New Zealand? For reference my Eastern European post Soviet occupation country had no availability problems. Also Eastern European post Soviet occupation country, the only country that actually spilled blood during the Eastern European revolutions (let's see how good your history …

Re: Are Voodoo graphics card THAT good ?

Posted on 2021-05-11, 11:44

Even Savage4 had if I'm correct 32bit and Motion Compensation and even if I didn't remember if only on paper also a sort of FSAA. It didn't matter that much at which frame rate.. it was not a bad solution compared to their prices. Savage4 is a perfect example, its another scam on the uninformed. …

Re: Are Voodoo graphics card THAT good ?

Posted on 2021-05-11, 11:19

Well, not quite... In my country (and in my city in particular) things were a "little" bit different. Intel parts/combos (even Celerons) were EXTREMELY expensive and completely out of reach for most people, not to mention that the Celeron 300A was probably unavailable most of the time - we only had …

Re: Are Voodoo graphics card THAT good ?

Posted on 2021-05-11, 09:48

It wasn't easy to attach to the "22bit train" if people actually could only "see" 16bit or 32bit in games; People buying new card couldnt see squat, all they had at home was some S3 Trio or worse an ISA card in the old system. Most didnt even know what >20 fps felt like in a game. All they had was …

Re: Has Anyone Ever Seen/Heard of a DigiSpeech Plus?

Posted on 2021-05-10, 01:37

Yes, it requires a 386+ and it traps access to those ports. Ditto for DMA stuff. That's the only way how a Sound Blaster could be emulated with a parallel port device. And from what I gathered from LGR's Oddware video on the Digispeech Plus, the Sound Blaster emulator that came with the Digispeech …

Re: Has Anyone Ever Seen/Heard of a DigiSpeech Plus?

Posted on 2021-05-09, 15:38

http://philipstorr.id.au/pcbook/book2/parallel.htm does it require specific type of lpt port? does it work with normal SPP one? how does its SB emulation work? does it require 386 cpu? How does it intercept port 220 writes? Data communication part is pretty trivial as we got 8+4 pins to work with, …

Re: Are Voodoo graphics card THAT good ?

Posted on 2021-05-09, 11:23

For example, in 1999, me and most of my friends had very slow CPUs (Pentium MMX or, at best, AMD K6-2), and I remember that, during the Summer of 1999, one friend in particular upgraded his PC from a Pentium MMX 166 to an AMD K6-2 450 & Riva TNT2 He got suckered by AMD :(. Celeron 300A was …

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