programmer to furnish code Basic Set of Material to Cover that implements these common in Lecture on Chapter One of services. 9th Edition of Silberschatz. It's better to have a single The OS performs as an program, the OS, that provides intermediary between the user these common services to all of the computing system and the other programs. the hardware, functioning as a virtual computer that makes SECTION 1.2 - Computer System the use of the hardware more Organization convenient and/or efficient. 1.2.1 - Computer System The first chapter Operation * Describes how a computing Components system is organized, and * CPU(s), primary memory, and * What the components are device controllers sharing a bus It also explains about the * CPUs and controllers can variety of different kinds of execute in parallel computing systems * CPUs and controllers compete (environment) and gives some to use the primary memory examples. * The memory controller arbitrates competition for use SECTION 1.1 - What Operating of memory Systems Do * operate the hardware Typically, computers boot (minimizing misuse) through automatic execution of * coordinates use of the a program in ROM that knows hardware among all the how to load the OS from programs running on the system secondary memory and jump into * makes the hardware (much) it. Details vary. easier to use * insures that the hardware is The primary purpose of CPUs is utilized efficiently to execute user program. * allocates resources (such as Therefore, whenever the CPU time and memory) to operating system is executing running programs on a CPU, its job is to finish whatever it needs to do as Most or all programs running soon as possible, and then on a computer need to be VACATE the CPU by dispatching provided with the services a user process. listed above. This means that the OS is NOT It does not make sense to EXECUTING much of the time. require every application (When people say that the OS
Basic Set of Material to Cover in Lecture on Chapter One of 9Th
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