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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 …

Re: Voodoo2 Memory: Disable rear TMU chips

Posted on 2024-05-06, 17:31

Thx for sharing info, may be useful someday 😀 Just for the record, I recently modded v2 Diamond Monster 3D II 8MB->12MB and have 2nd one waiting for mem mod. On both these resistors were soldered. So, no stress with mem upgrade. Added location of these r149/r150 (both 47ohm).

Re: Voodoo 2 color issue (pinks instead of blues)

Posted on 2024-05-03, 13:32

It looks like missing green color in rgb on stb v2. Check inductors between vga and dac. Use 3dfx test tools to display colors for v2 and diagnose. Do not trust regular viewers coz video will be handled by main 2d card. You may try unplug problematic card and measure resistance on each rgb pins on …

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