LYCOS RETRIEVER 
Intel 80386: Programs
built 255 days ago
Intel later introduced the 80486, but neither it nor its successors going by the Pentium name were as big a step as the 32-bit flat addressing made by the 80386. Most applications running on PCs in 2001 will run on the older 80386; there are only a few instructions that the later generations added and they can in most cases be easily replaced. Building a program for the 80286 is much harder, and usually requires fundamental changes to the application.
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Intel later introduced the 80486 , but not until the introduction of EM64T in 2004 did Intel's processors introduce as important a feature as the 32-bit flat addressing made possible by the 80386. (Other microprocessor architectures, such as the Motorola 68000 , had long since supported this form of addressing.) Most applications running on current Intel-based personal computers will still run on the older 80386, albeit very slowly; there were relatively few instructions added to the main instruction set in later generations, and in most cases their usage can be avoided. Building a program for the 80286 was often much harder.
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Intel eventually addressed this problem with the 80386 chip. This was the first CPU for the PC which had features such as virtual memory management and was ... 32 bit. Although the 80386 systems were capable of running existing 16-bit DOS and Windows programs, these new powers allowed the PC to run more powerful operating systems, and led to the development of new operating systems such as Windows NT and, of course, Linux (see History).
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DJGPP is a complete 32-bit C/C++ development system for Intel 80386 (and higher) PCs running DOS. It includes ports of many GNU development utilities. The development tools require a 80386 or newer computer to run, as do the programs they produce. In most cases, the programs it produces can be sold commercially without license or royalties.
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