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Below is the full 8086/8088 instruction set of Intel (81 instructions total). [2] These instructions are also available in 32-bit mode, in which they operate on 32-bit registers (eax, ebx, etc.) and values instead of their 16-bit (ax, bx, etc.) counterparts.
The 8086 [3] (also called iAPX 86) [4] is a 16-bit microprocessor chip designed by Intel between early 1976 and June 8, 1978, when it was released. The Intel 8088, released July 1, 1979, [5] is a slightly modified chip with an external 8-bit data bus (allowing the use of cheaper and fewer supporting ICs), [note 1] and is notable as the processor used in the original IBM PC design.
Version 4.0 of OMF for the 8086 family was released in 1981 under the name Relocatable Object Module Format, [6] [3] [4] and is perhaps best known to DOS users as an .OBJ file. Versions for the 80286 ( OMF-286 ) [ 7 ] [ 8 ] and the 32-bit 80386 processors ( OMF-386 ) [ 9 ] [ 10 ] [ 3 ] were introduced in 1981 and 1985, respectively.
The SDK boards provided a system monitor ROM to operate the keyboard and other interfaces. Kits varied in their specific features but generally offered optional memory and interface configurations, a serial terminal link, audio cassette storage, and EPROM program memory. Intel's Intellec development system could download code to the SDK boards.
x86 (also known as 80x86 [3] or the 8086 family [4]) is a family of complex instruction set computer (CISC) instruction set architectures [a] initially developed by Intel, based on the 8086 microprocessor and its 8-bit-external-bus variant, the 8088.
Using the software interrupt 21h instruction to call the MS-DOS operating system for output to the display – other samples use libc's C printf() routine to write to stdout. Note that the first example, is a 30-year-old example using 16-bit mode as on an Intel 8086. The second example is Intel 386 code in 32-bit mode.
CP/M-86 is a discontinued version of the CP/M operating system that Digital Research (DR) made for the Intel 8086 and Intel 8088. The system commands are the same as in CP/M-80. Executable files used the relocatable .CMD file format.
The Intel 8086, the original x86 processor, is a non-strict extension of the 8080, so it loosely resembles the original Datapoint 2200 design as well. Almost every Datapoint 2200 and 8008 instruction has an equivalent not only in the instruction set of the 8080, 8085, and Z80 , but also in the instruction set of modern x86 processors (although ...