The x86 architecture has a long and convoluted history dating back to 1978, when Intel announced the 16-bit 8086 microprocessor. IBM selected the 8086 and its cousin, the 8088, for IBM’s first personal computers. In 1985, Intel introduced the 32-bit 80386 microprocessor, which was backward ...
and Zimmerman, Richard E., "An Analysis of 8086 Instruction Set Usage in MS DOS Programs", (excerpt) 1989 ACM 0-89791-300-0/89/0004/0152, pp. 152-160. Slater, M., "AMD's K5 Designed to Outrun Pentium," Microprocessor Report, 8(14):1, 6-11 Oct. 24, 1994. Gwennap, L.,...
Two of the best known families of microprocessor are those based on the Motorola 68000 and Intel 8086 architectures, the 680x0 family gaining notoriety through its association with the Apple Macintosh and the 80x86 family through association with the IBM PC. By adopting this family approach, firs...
The 8086 microprocessor provided eight 16-bit registers. It could separately access the upper and lower eight bits of some of these registers. When the 32-bit 80386 was introduced, the registers were extended to 32 bits. These registers are called EAX, ECX, EDX, EBX, ESP, EBP, ESI, and...
Two of the best known families of microprocessor are those based on the Motorola 68000 and Intel 8086 architectures, the 680脳0 family gaining popularity through its association with the Apple Macintosh and the 80脳86 family through association with the original IBM PC. By adopting this family ...
instruction set in a first instruction set mode, receive a first interruption indication in the first instruction set mode, service the first interruption indication in a second instruction set mode, return to the first instruction set mode, receive a second interruption indication in the first ...
instructionsetarchitecture
Slightly later, Intel produced the 8008 microprocessor. Both chips copied the Datapoint 2200's instruction set architecture with minor changes. The Intel 8008 chip in its 18-pin package. The small number of pins hampered the performance of the 8008, but Intel was hesitant to even go to the...
then DI will automatically be incremented by one for a byte string or incremented by two for a word String Instruction in 8086. If the directionflagis set, DI will be automatically decremented by ono for a byte string or decremented by two for a word string. STOS does not affect any flag...
9. The microprocessor as recited in claim 8 wherein said enable value comprises a paging enable bit indicative, when set, of enablement of a paging translation mechanism within said microprocessor. 10. The microprocessor as recited in claim 1 wherein said instruction decode unit comprises: ...