The parameter packet is a location in application storage that contains the following data:

┌────────────────────────────────────┐
│Field        Length     C Datatype  │
├────────────────────────────────────┤
│X offset     WORD       SHORT       │
├────────────────────────────────────┤
│Y offset     WORD       SHORT       │
└────────────────────────────────────┘