for an event such as a button press or other interrupt; power consumption while sleeping (CPU clock and most peripherals off) may be just nanowatts‚ making many of them well suited for long lasting battery applications. Other microcontrollers may serve performance-critical roles‚ where they may need to act more like a digital signal processor (DSP)‚ with higher clock speeds and power consumption. Contents * 1 Embedded design * 1.1 Interrupts * 1.2 Programs * 1.3 Other microcontroller
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is the purpose of interrupts? What are the differences between a trap and an interrupt? Can traps be generated intentionally by a user program? If so‚ for what purpose? Interrupt is that causes a computer processor to temporarily stop executing its current program and execute another program instead‚ finally returning control to the original program. So it prevent that more important task goes back because of less important task. The main difference between a trap and an interrupt is where they are
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bios.h biosdisk Header bios.h Prototype int biosdisk(int cmd‚ int drive‚ int head‚ int track‚ int sector‚ int nsects‚ void *buffer); Description biosdisk accesses interrupt 0x13 for BIOS disk operations on the drive specified by the drive argument. For floppy drives‚ 0 identifies the first drive‚ 1 is for the second drive‚ and so forth. This function is not available under DOSX. cmd specifies the disk operation to perform. head‚ track‚ sector‚ nsects‚ and buffer provide further information
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purpose of interrupts? What are the differences between a trap and an interrupt? Can traps be generated intentionally by a user program? If so‚ for what purpose? (Chapter 1) Interrupt is that causes a computer processor to temporarily stop executing its current program and execute another program instead‚ finally returning control to the original program. So it prevent that more important task goes back because of less important task. The main difference between a trap and an interrupt is where
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The Simple Computer POST Power on self-test (POST) is a test which the computer completes on start-up which will verify whether the hardware is all working correctly. If the hardware is working correctly the computer will continue to boot if not a beep code is generated. A BIOS may have a different beep code depending on what type of BIOS it is. Steps of POST (Power on self-test) Power on self-test (POST) is a test which the computer completes on start-up which will verify whether the hardware
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1 CHAPTER Introduction Practice Exercises 1.1 What are the three main purposes of an operating system? Answer: The three main puropses are: • To provide an environment for a computer user to execute programs on computer hardware in a convenient and efficient manner. • To allocate the separate resources of the computer as needed to solve the problem given. The allocation process should be as fair and efficient as possible. • As a control program it serves two major functions:
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PIC16F87X Data Sheet 28/40-Pin 8-Bit CMOS FLASH Microcontrollers 2001 Microchip Technology Inc. DS30292C “All rights reserved. Copyright © 2001‚ Microchip Technology Trademarks Incorporated‚ USA. Information contained in this publication regarding device applications and the like is intended through The Microchip name‚ logo‚ PIC‚ PICmicro‚ PICMASTER‚ PICsuggestion only and may be superseded by updates. No repSTART‚ PRO MATE‚ KEELOQ‚ SEEVAL‚ MPLAB and The resentation or warranty is given and no
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1.5 Modern OS are interrupt driven. Events are almost signaled by the occurrence of an interrupt or a trap‚ which caused either by an error or by a specific request from a user program that an OS service be performed .Dual-mode Operation allows OS to protect itself and other system components whereas Multimode Operation increasingly CPUs support multi-mode operations. System call provides the means for a user program to ask OS to perform OS tasks on the user program’s behalf. When a system callis
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Assignment/Tutorial/Practical Report Cover Sheet Student’s Name : MUHAMAD LUKMAN BIN ISMAIL MOHAMMAD MUZAKKIR BIN MOHD JANNY MOHAMAD KHAIRUL NIZAM BIN MD NOOR NORANIZA BINTI ISHAK SYED JAFFAR BIN SYED MAHDZAR MOHAMAD SAFUAN BIN JOHARI Matric No. : 37209 34942 36967 39897
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Peripheral Component Interconnect (PCI) Babak Kia Adjunct Professor Boston University College of Engineering ENG SC757 - Advanced Microprocessor Design Why PCI? The original PC bus developed by IBM in 1982 was 16 bits wide and operated at 4.77 MHz This was known as the ISA bus‚ capable of transferring data at a whopping rate of 9 Mbytes per second! Gradually peripherals such as video cards and hard drives required a higher bandwidth‚ and in 1992 Intel introduced the PCI bus standard
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