Small programs could ignore the segmentation and just use plain
16-bit addressing. This allowed
8-bit software to be quite easily ported to the 8086. The authors of MS-DOS took advantage of this by providing an
Application Programming Interface very similar to
CP/M as well as including the simple .com executable file format, identical to CP/M. This was important when the 8086 and MS-DOS was new, because it allowed many existing CP/M (and other) applications to be quickly made available, greatly easing the acceptance of new platform
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