I have links here for ATi Rage2/2+ OpenGL drivers and earliler Mach64/Rage1 and Rage Pro non OpenGL drivers for NT 3.51 and we have many NT4.0 OpenGL drivers available for ATi second/third generation Rage cards, but not for Rage2c/Rage3 NT3.51 so directly. Maybe ATi Rage2+DVD also works with Rage2/Rage2+ drivers.

ATi early OpenGL dll-s where only mcd-s (minigl-s), not pure icd-s and all Rage3 cards did get full icd-s later. For Rage2/2+ cards NT 3.51 and NT4.0 OS was the only option for OpenGL i think, how well they work is another question, at least Rage3 is more capable. Does the NT4 minigl (atimcd.dll and atimcdr3.dll) work with NT3.51?

Rage2/Rage2c/RagePro drivers come together in early driver releases sometimes, i would love to see Rage Pro also with OpenGL stuff @ NT3.51, but seems that Rage3 cards where oriented more NT4.0 and up, many available NT 4.0 mcd and icd OpenGL exist for Rage3 cards and thats good.

NT3.51 Rage II/II+, Rage I, mach64 VT, mach64 CT and mach64 GX drivers, without OpenGL.
https://web.archive.org/web/20000829090516/ht … rs/nt351176.exe

Here is package for ATi RageII/II+ OpenGL drivers for NT3.51 and NT4.0:
https://www.upload.ee/files/15435715/winnt-ra … rivers.zip.html

Proof that ATi Rage Pro NT3.51 OpenGL driver or NT3.51 OpenGL .dll files exsisted is here:
https://web.archive.org/web/20001018021719/ht … rs/nt404392.txt
nt404392.txt readme has available OpenGL driver support info for theses cards and systems:
3D RAGE PRO: Windows NT 4.0 (ON WEB and ON CD) , Windows NT 3.51 (ON WEB, N/A ON CD)
3D RAG E II/II+: Windows NT 4.0 (ON WEB, N/A ON CD), Windows NT 3.51 (ON WEB, N/A ON CD)

NT3.51 Rage Pro drivers without OpenGL, they are available here:
http://vogonsdrivers.com/getfile.php?fileid=1560

if the NT3.51 package has atiogl.dll and igxogl.dll files, then they are OpenGL drivers.
NT4.0 early OpenGL drivers files called atimcd.dll and atimcdr3.dll, one or both files.
atimcd.dll (probably for Rage2) and atimcdr3.dll (probably only for Rage3 cards then).

Windows NT 3.51 Display Drivers Not Supported for RADEON, Rage 128 PRO, Rage 128, Rage Mobility, Rage XL,Rage XC:
The driver/software you have selected is NOT SUPPORTED.This means that ATI does NOT produce drivers or software for the particular combination of chipset and operating environment which you selected. In most cases, you can use a generic "VGA" or "VESA SVGA" driver that is provided with your operating system or operating environment.

Windows NT 3.51 Display Drivers info for Rage LT PRO,Rage PRO, Rage IIc:
NT 3.51 does not contain support for AGP display adapters. Use the VGA driver for AGP versions of these products.For PCI cards based on these chips, check your ATI Installation CD for an NT 3.51 driver (look for a \nt351 directory). If cannot locate the drivers on your ATI Installation CD, please contact ATI Technical Support for assistance.

This is then similar to Windows95A - that had no AGP support and Windows95B that had AGP support. So the NT3.51 drivers work only with PCI cards and NT4.0 works with both (AGP and PCI for NT4.0 SP3 or newer)? Does anybody use Rage Pro AGP with NT3.51 (without/with OpenGL)?

Seems there is update for AGP cards and Windows NT3.51, does the SP5 help/AGP patched HAL(i see some agp info here)?
https://microsoft.public.windowsnt.setup.nark … ere-to-download
https://forum.winworldpc.com/discussion/4718/ … this-out-nt3-51
https://www.betaarchive.com/forum/viewtopic.php?t=35993

Did ATi use ati3dcif for OpenGL 1.0 with NT3.51 OS?
Intresting that Rage2/2+ NT3.51 driver opgl351.exe has atiogl.dll (that is old ati3dcif.dll 4.03.2150 file). We should test this driver out with RageII+DVD or PCI versions Rage2C or Rage PRO first and upgrade atiogl.dll (ati3dcif.dll at least to 4.10.2661 - that supports Rage2c and Rage Pro cards). For Rage2/2+ it should just work as it is or it can be also upgraded later, if upgraded atiogl.dll cif works. Also we can add Rage Pro NT3.51 drivers with these Rage2 OpenGL file with updated 3dcif.dll (atiogl.dll), but does these Win9x cif files even work for NT?

3dcif files:
https://gona.mactar.hu/ATI3DCIF/drivers/all_ATI3DCIF_DLL.zip
https://gona.mactar.hu/ATI3DCIF/

This should be NT3.51 Rage2C drivers, cant unpack these japan drivers so easly to see inside:
https://ftp.zx.net.nz/pub/archive/ftp.compaq. … 000/sp13626.txt
https://ftp.zx.net.nz/pub/archive/ftp.compaq. … 000/sp13626.exe
With Japan OS or some unpack trick should help to extract these files, message it gives:
Cannot be run in US mode or some similar text in dos and windows98.

I can share all my NT 4.0 OpenGL drivers files also somewhere (mostly they are for Rage3), but i am looking ATi Rage2c/Rage Pro OpenGL NT3.51 drivers or dll files here. Somebody has time and is intrested testing early NT3.51 drivers out for Rage2/Rage3 with OpenGL support? Can someone unpack these Japan drivers, maybe even they have OpenGL dlls? If someone has more ATi Rage2/Rage2+/Rage2c/Rage Pro (Rage3) NT3.51 drivers to share, please share them here, Thank you!