2.6 Interrupts and Exceptions 中断和异常 The 80386 has two mechanisms for interrupting program execution: 80386对中断处理执行有两个机制: Exceptions are synchronous events that are the responses of the CPU to certain conditions detected during the execution of an inst…

Intel 80386 Reference Programmer's Manual 80386程序员参考手册 Chapter 1 -- Introduction to the 80386 第1章 - 80386的介绍 The 80386 is an advanced 32-bit microprocessor optimized for multitasking operating systems and designed for applications needing very high p…

2.1 Memory Organization and Segmentation 内存组织和分段 The physical memory of an 80386 system is organized as a sequence of 8-bit bytes. Each byte is assigned a unique address that ranges from zero to a maximum of 2^(32) -1 (4 gigabytes). 80386系统的物理内存被看做8位…

Chapter 2 -- Basic Programming Model: 基本的程序模式 Introduces the models of memory organization. Defines the data types. Presents the register set used by applications. Introduces the stack. Explains string operations. Defines the parts of an instruction.…

10.3 Switching to Protected Mode  切换到保护模式 Setting the PE bit of the MSW in CR0 causes the 80386 to begin executing in protected mode. The current privilege level (CPL) starts at zero. The segment registers continue to point to the same linear address…

译注:一些异常没有翻译,因为看书时主要为了理解linux代码,所以代码中没有主要使用的就没有仔细看.这部分内容后期再看时再进行翻译. 9.8 Exception Conditions 异常条件 The following sections describe each of the possible exception conditions in detail. Each description classifies the exception as a fault, trap, or abort…

9.6 Interrupt Tasks and Interrupt Procedures 中断任务和中断处理程序 Just as a CALL instruction can call either a procedure or a task, so an interrupt or exception can "call" an interrupt handler that is either a procedure or a task. When responding to an i…

Chapter 9 Exceptions and Interrupts 第9章 异常和中断 Interrupts and exceptions are special kinds of control transfer; they work somewhat like unprogrammed CALLs. They alter the normal program flow to handle external events or to report errors or exceptional…

7.5 Task Switching 任务切换 The 80386 switches execution to another task in any of four cases: 80386在以下四种情况下会切换另一个任务去执行: The current task executes a JMP or CALL that refers to a TSS descriptor. 当前任务执行了一个引用了TSS描述符的JMP或CALL. The current task executes a JMP…

7.1 Task State Segment 任务状态段 All the information the processor needs in order to manage a task is stored in a special type of segment, a task state segment (TSS). Figure 7-1 shows the format of a TSS for executing 80386 tasks. (Another format is used…