The tool scans the ROM to identify how the specific hardware abstraction layer (HAL) handles ARM calls (PceNativeCall). It alerts developers if their code relies on undocumented behavior that works on a Palm Tungsten T ROM but would crash a Sony Clie NX series ROM, both of which ran OS 5.0 but handled multimedia hardware differently.
The is the firmware image that powered Palm’s early ARM-based devices, most notably the Palm Tungsten T (2002). Unlike previous 68k-only OS versions, OS 5.0 introduced an ARM-native kernel while still running most legacy 68k apps via an on-the-fly emulation layer called PACE (Palm Application Compatibility Environment).