an example can be found on AMOSPro_Examples:Examples/H-4/Help_41.AMOS
Performs a Screen PACK and saves it into a memory bank. The graphics, screen modes and all location details are saved together, ready to be unpacked at a later date.
Spack screennumber To Banknumber
Packs an entire screen
Spack screennumber To banknumber,tx,ty,bx,by
Compresses the region from tx,ty to bx,by