Version V2, DLL injection is no longer required.

Hi! Is it possible to make such speedup fix for 32-bit system?

Pavel 69 wrote on 2026-09-03, 06:36:

Hi! Is it possible to make such speedup fix for 32-bit system?

You can try the fix, but I can't guarantee it will work.

Ok, I will try this version. I just read note that it for 64-bit OS so didn't try.

Pavel 69 wrote on 2026-09-03, 13:02:

Ok, I will try this version. I just read note that it for 64-bit OS so didn't try.

I made a quick test on XP 32-bit; there don't seem to be any issues, but it needs thorough testing. If you're up for a session of at least an hour to make sure everything is okay, please let us know—thanks!

By the way, regarding the 64-bit arithmetic: I was mistaken in thinking it wouldn't work on 32-bit systems. It's just a mathematical calculation, not a conversion of the executable to 64-bit—something 32-bit systems are perfectly capable of handling.

5a796d wrote on 2026-09-04, 10:50:

I made a quick test on XP 32-bit; there don't seem to be any issues, but it needs thorough testing. If you're up for a session of at least an hour to make sure everything is okay, please let us know—thanks!

By the way, regarding the 64-bit arithmetic: I was mistaken in thinking it wouldn't work on 32-bit systems. It's just a mathematical calculation, not a conversion of the executable to 64-bit—something 32-bit systems are perfectly capable of handling.

I'm back with report. It works! Main tests were with Win 7 32-bit, but I also run game with Win Xp 32-bit just to see it can be start there. So I spent whole evening yesterday playing GP500 with your fix. No issues were spotted, no frame drops or speedups. Game run smoothly. I was able to complete full distance race at Brno! Finally! Thank you very much for this fix!

One more question. I'm playing GP500 with steering wheel. When I enter game, go on track I have force feedback. But as soon as I crash somewhere force feedback is gone. So I have to restart GP500 to return FF back. It looks like some bug in game.exe and it existed before your fix. Maybe you can help with this too?

Pavel 69 wrote on Today, 07:57:

5a796d wrote on 2026-09-04, 10:50:

I made a quick test on XP 32-bit; there don't seem to be any issues, but it needs thorough testing. If you're up for a session of at least an hour to make sure everything is okay, please let us know—thanks!

By the way, regarding the 64-bit arithmetic: I was mistaken in thinking it wouldn't work on 32-bit systems. It's just a mathematical calculation, not a conversion of the executable to 64-bit—something 32-bit systems are perfectly capable of handling.

I'm back with report. It works! Main tests were with Win 7 32-bit, but I also run game with Win Xp 32-bit just to see it can be start there. So I spent whole evening yesterday playing GP500 with your fix. No issues were spotted, no frame drops or speedups. Game run smoothly. I was able to complete full distance race at Brno! Finally! Thank you very much for this fix!

One more question. I'm playing GP500 with steering wheel. When I enter game, go on track I have force feedback. But as soon as I crash somewhere force feedback is gone. So I have to restart GP500 to return FF back. It looks like some bug in game.exe and it existed before your fix. Maybe you can help with this too?

Good, I'm glad it's working! As for the FFB, you should look for a DirectInput or XInput wrapper, depending on your steering wheel model. It’s almost certainly not an issue with the executable itself; rather, the old DirectX 6.1 components are emulated on NT-based systems, which causes problems. You’ll definitely find something useful on GitHub—it’s similar to the graphics situation, where you need to use dgVoodoo to get it running correctly.