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Re: Voodoo 2 with mild artefacts

Posted on 2024-08-06, 17:06

Check legs on both tmus, there may be bad contact, resolder if necessary all rows. Check ram chips related to each tmu, sometimes bad contact on corner chips. Check small smd resistors, especially 4-packs, sometimes have higher impedance, usually is 22r, but range 10-56 - replace if necessary. You …

Re: Creative Banshee AGP - missing parts

Posted on 2024-07-18, 16:33

Forgot reflow, go for reball, this card is worth additional effort. But first check all ladder resistor packs 4x33ohms, especially the blue ones - in other card I had to replace 25 pieces due their resistances floated from hundreds ohms to several kilos. Their values should be in range 22-56 ohms, …

Re: Voodoo 3 Shootout

Posted on 2024-06-12, 15:37

Great comparisons. I'd add 640x480x16 modes and please, convert textured pictures from bars in pdf to ordinary squared colored boxes. Now pdf has 44MB, it's total overkill where should have less than 100kB. Cheers 😀

Re: Causes for common VGA output artifacts?

Posted on 2024-06-12, 14:58

The ghosting effect on 1st picture. To me it looks like degradation of dac output transistors/amplifiers on analog lines rgb signals. I had similar issue with old GF256. I eliminated all aspects on analog outputs on vga lines and finally I fixed it by switching card to digital dvi output. The semi- …

Re: Voodoo 4440H

Posted on 2024-06-11, 20:00

Perfect results, seems 2nd tmu gives a lot of fps power. I think, i'll sacrifice my 2 v1 to build your v1 with 2 tmus. It is worth, but I'l will probably cry while desoldering chips 😉 I'd to see schematics and gerber files. Cheers.

Re: Voodoo 4440H

Posted on 2024-06-11, 18:52

It is great result with 2 tmus enabled, I'm curious how much fps are in 4400 variant. On my platform with p2 266/66, 128mb ram, asus p2b 440bx, however this is old one v1 4MB card (but fast version), according to your cards nomenclature 2200. All tests 640x480x16, 3dm99 double buffer 1462. Unreal 16 …

Re: Voodoo 2 4444SX

Posted on 2024-05-13, 17:44

"The level of selective reading you're doing is truly something." You didn't refer to my questions/conclusions too, you map your selective readings to me, however you do the same thing. "That's why they can use 3rd tmu, they use own drivers, they can multiplex data for 3rd tmu. This is hacky way. …

Re: Voodoo 2 4444SX

Posted on 2024-05-13, 15:33

"I'm not speaking of Primary Image architecture when talking about glide, since at that point it's just a V2 with an extra TMU. It's not using the MIPS CPU, it's not using the TEMPEST API. It's using a custom glide2x library for the extra TMU. So what's so special about this that you're not calling …

Re: Voodoo 2 4444SX

Posted on 2024-05-13, 14:24

I think we speak about the same thing but from 2 points of view. I speak from strictly 3dfx architecture and you from primary image. And we both can have right. Me: you can't jump out of the address space window, no mather what. You: primary image did 12MB. Then I wrote they use hacky way with copy …

Re: Voodoo 2 4444SX

Posted on 2024-05-13, 13:48

No needs to be nervous. Just wrote my opinion and thoughts. Piranha/Barracuda aren't 3dfx products. They have own drivers, will not work with regular ones from 3dfx. You can't use them with games and so on. They use external controller and multiplex to address 3dfx chips, because of limits of …

Re: Voodoo 2 4444SX

Posted on 2024-05-13, 12:51

Thx for extra info. Seems I had right. There was nothing done with extending address space window for tmus. Still 8MB and this implicts use of 3rd tmu to share same memory as 2nd tmu. Which makes these solutions in reality 2x12MB cards, not 2x16MB (including fbi: 4+8=12, but not 4+12=16). Usage of …

Re: Voodoo 2 4444SX

Posted on 2024-05-11, 19:52

It means that each tmu unit use only 2MB-4MB of mem depending of number of tmus, nothing else. 8MB is the max you can use for all tmus per one application. It means for one card 1 fbi+[1-4] tmu. In sli 2 fbi + [2-8] tmu.

Re: Voodoo 2 4444SX

Posted on 2024-05-11, 19:22

There is only 8MB address space per all tmu units. I mentioned there can be "possible" configuration of 4/2/2 or 2/4/2 or 2/2/4 MB per 1 tmu of 3 if you want to use 3 tmu units and full memory space. There is option of course for 2/2/2/2 theoretical 4 tmus. In SLI mode you have 2 address space, so …

Re: Voodoo 2 4444SX

Posted on 2024-05-11, 17:15

It's great what you're doing but... I'm curious how you solved address space issue in v2. There is only 8MB for all tmu units. How it's possible to use 3 or 4 chips with 4MB each? According to the spec, there is only 8MB window for all of them. Even other companies didn't make such cards due to this …

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