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nVidia Forceware driver 77.72 patch for 512MB VGAs

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First post, by RayeR

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As you know, R.Loew made nvidia videomem size patch for >256MB cards, that modifies NVCORE.VXD of 82.69 drivers. A friend of mine asked me if the patch can be backported to 77.72 drivers because he claims the newer drivers renders artefacts in some games on his GF7800. I never had GF7800, only GF7600 and GF7900 and had no problems with 82.69 drivers (except shutdown problem). So I tried to look what the patch changed on NVCORE.VXD ver 82.69. I found 3 code hooks by JMP/CALL that referenced a piece of new code added in a caveat near EOF. I tried to find similar code in ver 77.72, patched it, copied new code and modified the offsets to match. I'm not sure that I found the right matching code and how much the 77.72 differs but some parts looked pretty similar. I only don't know what to do with 3 changed Bytes at offset 144-146h. I thought it may be a checkusm in LE header but it's further and my tool says the checksum is 0 even in original file. I hope Windows would not complain and load the driver anyway.

I cannot test it and he too coz his GF7800 had died. So if someone interested plese test it on GF7800/512MB and let me know how it works. Patched driver is temporarly here

http://www.rayer.g6.cz/1tmp/7772mod.vxd

rename to NVCORE.VXD and replace your version. Use with 77.72 don't mix with other version of installed drivers.

UPDATE: Permanent patched file location is now here:
http://windows98.xf.cz/index.htm#NV7722PATCHED

Last edited by RayeR on 2022-02-07, 03:28. Edited 1 time in total.

Gigabyte GA-P67-DS3-B3, Core i7-2600K @4,5GHz, 8GB DDR3, 128GB SSD, GTX970(GF7900GT), SB Audigy + YMF724F + DreamBlaster combo + LPC2ISA

Reply 1 of 9, by RayeR

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The previous version of patched driver caused crash. This was probably due to Dword at 144h that I left untouched but it seems it may be code size so I had to adjust it. Now it should go a bit step further, file reuploaded:

http://rayer.g6.cz/1tmp/7772mod.vxd

Last edited by RayeR on 2022-02-07, 03:28. Edited 1 time in total.

Gigabyte GA-P67-DS3-B3, Core i7-2600K @4,5GHz, 8GB DDR3, 128GB SSD, GTX970(GF7900GT), SB Audigy + YMF724F + DreamBlaster combo + LPC2ISA

Reply 2 of 9, by RayeR

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I got report that patched driver now works with 256MB VRAM card so anyone interested to try with 512MB?

Gigabyte GA-P67-DS3-B3, Core i7-2600K @4,5GHz, 8GB DDR3, 128GB SSD, GTX970(GF7900GT), SB Audigy + YMF724F + DreamBlaster combo + LPC2ISA

Reply 3 of 9, by RayeR

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Daniel (for whom I made this mod) finally had a luck to buy 7800GT AGP with G70 chip and 512MB VRAM. He tested my patched w9x driver 77.72 and played some games on it without any problem 😀
Permanent patched file location is now here:
http://windows98.xf.cz/index.htm#NV7722PATCHED

Gigabyte GA-P67-DS3-B3, Core i7-2600K @4,5GHz, 8GB DDR3, 128GB SSD, GTX970(GF7900GT), SB Audigy + YMF724F + DreamBlaster combo + LPC2ISA

Reply 4 of 9, by Imperator

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Hello.
I tried to download the patched version you've made for 77.72.
Unfortunately the web page returned an error 404 - not found.
Would you be so kind and post it on another server and put the link so we can try it?
Thanks mate

PC 1: - Intel STL2 G7ESZ Dual Socket 370 Motherboard + 2 x Pentium III 1Gz CPU + 4 x 1 Gb RAM + VooDoo2
PC 2: - ECS K7VTA3 + Athlon XP 3000 + 1Gb RAM + 3dfx VooDoo 5 5500 AGP 64MB
PC 3: - ASrock 775i65G v2.03 + Intel QX6800 + 2GBRAM + ATI HD3850 AGP

Reply 5 of 9, by agent_x007

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Have a archive file : LINK

Also, it returned 404, because it doesn't use https protocol (required at this point on all websites) :
Try here : http://windows98.xf.cz:8080 file you are looking for is "nvc7772p.zip [1 MB]"

Reply 6 of 9, by DarthSun

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agent_x007 wrote on 2024-08-17, 11:48:

Have a archive file : LINK

Also, it returned 404, because it doesn't use https protocol (required at this point on all websites) :
Try here : http://windows98.xf.cz:8080 file you are looking for is "nvc7772p.zip [1 MB]"

Thanks! I downloaded it too. I use 82.69 on Madness machines, but I'll try this mod as well. The 77.72 / win9x driver is no longer up on the NV side, but it has come down from an alternative side.

The 3 body problems cannot be solved, neither for future quantum computers, even for the remainder of the universe. The Proton 2D is circling a planet and stepping back to the quantum size in 11 dimensions.

Reply 7 of 9, by RayeR

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Hi, sorry my win98 collection website was completly deleted some year ago without any warning (but the domain could be registered again). I had not ful backup but I have most of files on various CD/DVDs. I restored only index.html yet and I can upload most of files on request. So for others I'll reupload the modded drivers...

Gigabyte GA-P67-DS3-B3, Core i7-2600K @4,5GHz, 8GB DDR3, 128GB SSD, GTX970(GF7900GT), SB Audigy + YMF724F + DreamBlaster combo + LPC2ISA

Reply 8 of 9, by Imperator

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@agent_x007

Thanks mate!
It is awesome to have all this quality stuff in one place.

@RayeR
Thanks mate for all your effort !

PC 1: - Intel STL2 G7ESZ Dual Socket 370 Motherboard + 2 x Pentium III 1Gz CPU + 4 x 1 Gb RAM + VooDoo2
PC 2: - ECS K7VTA3 + Athlon XP 3000 + 1Gb RAM + 3dfx VooDoo 5 5500 AGP 64MB
PC 3: - ASrock 775i65G v2.03 + Intel QX6800 + 2GBRAM + ATI HD3850 AGP

Reply 9 of 9, by RayeR

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The file is back on http://windows98.xf.cz if any reup req. send me a PM...

Gigabyte GA-P67-DS3-B3, Core i7-2600K @4,5GHz, 8GB DDR3, 128GB SSD, GTX970(GF7900GT), SB Audigy + YMF724F + DreamBlaster combo + LPC2ISA

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