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It is based on explicit memory allocation. When the .app file has been parsed, OS_Fma finds memory area according desired length and offset. Those area are allocated by OS_Axm and binaries are copied to them with OS_Mv. Memory handle, number of installed applications, first application DOR are stored in an installation handle (OZ 4.6 and newer). Each installation leaves two handles open : the memory handle (type 3) and the installation handle (type 7). It ends by chaining the application DORs to the previous installed or to the application front device ':APP.-'.
Remove principle
It is performed by getting DOR from selected application, finding its corresponding installation handle with OS_Fn. Commands FN_GH (find handle), FN_NH (find next handle) parse the handle list to find it (OZ 4.6 and newer). Then DORs are unchained from the current linked list of installed applications, memory freed by OS_MCl. Installation handle is freed by OS_Fn with FN_FH (free handle). Before removal, existing processes are checked by DC_Pol with A7 bit set option (OZ 4.6 and newer). The following processes are updated with the new application static handles because the static handle of the removed application will be used by another one if other application are installed. This update is performed by OS_Uash (OZ 4.6 and newer).
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