Core Insights - The Intel 80386 processor, launched in October 1985, marked a significant turning point in personal computing as the first 32-bit chip in the Intel PC product line and the origin of the IA-32 instruction set [1][5][14] - The 80386 featured 275,000 transistors and operated at a frequency of up to 16 MHz, supporting a maximum address space of 4GB, which laid the foundation for true multitasking and virtual memory [1][4] - The introduction of the 80386 led to the development of various operating systems, including early versions of Windows and Linux, which utilized its advanced features [4][12] Group 1: Historical Context - The 80386 was developed as a response to the competitive landscape, particularly after IBM rejected Intel's earlier designs, leading Compaq to be the first company to launch a computer with the new CPU [2][11] - The Deskpro i386, released by Compaq in September 1986, was priced at $6,499 and became a pivotal product in the PC industry [2][10] - The architecture of the 80386 was influenced by the need for backward compatibility and the desire to create a more powerful and efficient processing unit compared to its predecessors [6][8] Group 2: Technical Advancements - The 80386 introduced a protected mode and paging capabilities, which allowed for better memory management and the ability to run multiple DOS sessions simultaneously [1][4][8] - It expanded the instruction set significantly, adding 54 new instructions and various addressing modes to effectively utilize the 4GB address space [8][10] - The architecture's design enabled the development of a robust ecosystem around the 80386, leading to its widespread adoption in servers and mobile computers [14] Group 3: Market Impact - The 80386's success was crucial for Intel, as it faced significant competition from other manufacturers who were also producing x86-compatible processors [5][12] - By the late 1980s, the 80386 had established itself as a standard in the PC market, leading to the creation of a diverse range of applications and operating systems that leveraged its capabilities [12][14] - The processor's legacy continues today, as modern x86 processors still retain the core architecture established by the 80386, highlighting its lasting influence on computing [14][15]

公众号记得加星标⭐️，第一时间看推送不会错过。 来 源 ： 内容 编译自 tomshardware 。 i386 搭载 275,000 个晶体管，发布时运行频率高达 16 MHz。它内部配备了 32 位通用寄存器、扁平 内存模型，并支持高达 4GB 的地址空间，但更大的变化在于系统架构。保护模式、虚拟 8086 模式 和硬件分页为 x86 上的真正多任务处理和虚拟内存奠定了基础。微软早期的 i386 开发工具包中包含 多 个 DOS 会 话 并 行 运 行 的 演 示 ， 每 个 会 话 都 在 各 自 的 分 页 虚 拟 机 中 运 行 。 这 在 1990 年 成 为 Windows 3.0 的核心功能，名为"386 增强模式"。 在遭到IBM拒绝后，康柏成为首家推出搭载英特尔新CPU的电脑的公司。1986年9月推出的Deskpro i386比IBM早了近一年上市。这完全是意料之中的事；康柏曾与英特尔直接合作开发芯片，并抢先获 得了硅片的使用权。这款电脑的起售价为6,499美元，成为了PC行业的转折点。英特尔制造了芯片， 但康柏却主导了整个行业的节奏。 Linux也是基于 i386 构建的。Linus T ...