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The Intel 386, originally released as the 80386 and later renamed i386, is the third-generation x86 architecture microprocessor from Intel. It was the first 32-bit processor in the line, making it a significant evolution in the x86 architecture.
The primary defining characteristic of IA-32 is the availability of 32-bit general-purpose processor registers (for example, EAX and EBX), 32-bit integer arithmetic and logical operations, 32-bit offsets within a segment in protected mode, and the translation of segmented addresses to 32-bit linear addresses.
The Intel Inboards allowed users to run 386-dependent software which would not normally run on an XT or AT class machine. Examples of such programs include: Ventura 2.0 Desktop Publishing Software (with Hercules monochrome graphics), AutoCAD 386, Windows 3.1 (Inboard 386/AT model only).
The original IBM PC (Model 5150) motivated the production of clones during the early 1980s. IBM decided in 1980 to market a low-cost single-user computer as quickly as possible. On August 12, 1981, the first IBM PC went on sale. There were three operating systems (OS) available for it.
The P75 was a released in 1990 upgraded version of P70 model, and is noted as being the first portable computer using a 486 CPU to be available for sale in the United States. It had a briefcase-shaped design and ran off A/C power only, as was common with high performance portable computers at the time.
The Personal System/2 Model 70 386 and Personal System/2 Model 70 486 are midrange desktop computers in IBM's Personal System/2 (PS/2) family of personal computers. The PS/2 Model 70 386, released in June 1988, features an Intel 386 microprocessor clocked between 16 MHz and 25 MHz (depending on the submodel) and features the 32-bit Micro Channel architecture (MCA) bus; the Model 70 486 ...
The Personal System/2 Model 25 and its later submodels the 25 286 and 25 SX are IBM's lowest-end entries in the Personal System/2 (PS/2) family of personal computers. Like its sibling the Model 30, the Model 25 features an Industry Standard Architecture bus, allowing it to use expansion cards from its direct predecessors, the PC/XT and the PC/AT—but not from higher entries in the PS/2 line ...
386BSD (also known as "Jolix" [2]) is a Unix-like operating system [3] that was developed by couple Lynne and William "Bill" Jolitz. [4] Released as free and open source in 1992, it was the first fully operational Unix built to run on IBM PC-compatible systems based on the Intel 80386 ("i386") microprocessor, and the first Unix-like system on affordable home-class hardware to be freely ...