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A86 is an assembler for MS-DOS which generates 16-bit code for the Intel x86 family of microprocessors. Written by Eric Isaacson, it released as shareware in June 1986. The assembler is contained in one 32K executable and can directly produce a COM file or an object file for use with a standard linker. It comes with a debugger, D86.
Open Watcom Assembler or WASM is an x86 assembler produced by Watcom, based on the Watcom Assembler found in Watcom C/C++ compiler and Watcom FORTRAN 77. [ 1 ] [ 2 ] [ 3 ] Further development is being done on the 32- and 64-bit JWASM project, [ 4 ] which more closely matches the syntax of Microsoft's assembler .
By mid-1980 SCP advertised 86-DOS, priced at US$95 for owners of its US$1,290 8086-board and US$195 for others. It touted the software's ability to read Zilog Z80 source code from a CP/M disk and translate it to 8086 source code, and promised that only "minor hand correction and optimization" was needed to produce 8086 binaries. [7]
FASM (flat assembler) is an assembler for x86 processors. It supports Intel-style assembly language on the IA-32 and x86-64 computer architectures. It claims high speed, size optimizations, operating system (OS) portability, and macro abilities. [2] [3] It is a low-level assembler [3] and intentionally uses very few command-line options.
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.
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 [citation needed] and June 8, 1978, when it was released. [5] The Intel 8088, released July 1, 1979, [6] 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 ...
The last version of Turbo Assembler is 5.4, with files dated 1996 and patches up to 2010; it is still included with Delphi and C++Builder. TASM itself is a 16-bit program. It will run on 16- and 32-bit versions of Windows, and produce code for the same versions, but it does not generate 64-bit x86 code.