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School of Computer Science & Engineering
University of New South Wales
 Advanced Operating Systems 
 COMP9242 2002/S2 

OS Startup Code

1. Register itself for all free interrupts.
2. Grab all memory from (without interfering with other initial tasks).
3. Set up data structures for memory management:
   • reserved space for own tables,
   • free lists/frame table/page tables for client memory.
4. Grab all (inactive) tasks.
5. Start device drivers (may be started as separate initial server tasks).
   • Drivers map device pages.
6. Start other server threads (if multi-server implementation).
7. Set up data structures for services (TCBs, file system, ...)
8. Set up task management.
9. Start up initial ``user'' task(s).
10. Possibly donate tasks to subtasks.