Chapter goals

Memory addressing & allocation

• Memory allocation is the assignment or reservation of memory segments for system software, application programs, and data
• Memory allocation is the responsibility of the operating system
• Common scheme is to place OS in low memory and applications in high memory
• This can be demonstrated with C++ program

Memory allocation

Absolute vs. relative addressing

• Some programming languages (C, C++) allow instructions that reference explicit memory locations
• BRANCH to location #
• STO to location #
• Absolute addressing describes memory address operands that refer to actual physical memory locations