Описание патча от UCyborg
https://www.vogons.org/viewtopic.php?f=8&t=57091#p632407
I made my own patch bypassing CPUID queries that works with all processors. Why does it care about L1 and L2 caches? Zeus' patch doesn't bypass anything, it just makes function querying vendor string always return AuthenticAMD, so no practical difference for AMD CPUs. I NOPed out entire function dealing with CPUID queries. There are a lot CPUID instructions in the code, majority seems like unused code. There's even a branch that would execute privileged instructions, with a check to only do it on Win9x. Doesn't Win9x just silently ignore privileged instruction exceptions?
I also fixed the bug that prevented Direct3D mode from working with a lot of video RAM. It can easily be reproduced with dgVoodoo2. Set onboard RAM to 512 MB and it works, set it to 1024 MB and it exits with an odd error in the log file. I think it uses a magic value of 999,99 MB when processing data files to tell when to break out of some loop. The value is compared against video RAM amount and when there is more than 999,99 MB, the condition to break out of the loop no longer applies.
The game also has checks that make it fallback from DirectSound to WaveOut if it detects NT based Windows system. It doesn't utilize any special DirectSound features by default, need to open .\dll\sound\Snd_cpa.ini and under [DLL_Sxd] set Unconditionnal setting from None to WAVd3 to enable 3D sound. This requires Creative ALchemy on Vista+. I'm using Win98VersionLie and SingleProcAffinity shims from Compatibility Administrator for ProRally.exe, for RallySetup.exe and RallySetupSound.exe I also applied RunAsInvoker shim to stop them from asking for administrative rights; Windows' Compatibility Engine treats them as installers due to presence of word "setup" in file properties/resources.
SingleProcAffinity appears to prevent hang when exiting via menu (another case of multithreading went wrong with multiple CPUs), I haven't played for extended period of time; it never hung on exit on my previous PC with single-core Celeron CPU and GeForce4 MX 440 GPU running Windows XP, Alt + F4 still hangs. I settled with running the game in Direct3D mode via dgVoodoo2, forcing resolution to 1440x1080, the maximum 4:3 resolution on 1920x1080 monitor. By leaving in-game resolution set to 640x480, the transitions from menu to gameplay are smooth. Also have Scaling mode in dgVoodoo2 set to Stretched, keep Aspect Ratio, which ensures the physical monitor resolution is never changed.
Forgot to mention; on Windows 8+, DirectPlay must be installed for game to launch (Control Panel->Programs and Features->Turn Windows features on or off->Legacy Components->DirectPlay).
Edit: updated DirectSound information.
