This loads a handle from MP-sysmodule state.

• When the index is <16, the handle is loaded from an array of event handles. When eventhandle[nodeID] is signaled, this indicates that data is available via MP:RecvDataFrame with that same nodeID.
• When the index is 16, the handle is loaded from stateptrother+{someoffset}.
• When the index is >16(accessed via 17 by the user-process normally), the handle is loaded from stateptrother+{someoffsetother}. This is 0x3000-byte sharedmem, the user-process maps it with mypermissions=read-only and otherpermission=DONTCARE.