A 16 bit application
is software for MS-DOS
or Microsoft Windows
which originally ran on the 16-bit Intel 8088
and Intel 80286 microprocessors
. These used a segmented address space to extend the range of addresses from what is possible with just a 16-bit address. Programs with more than 64 kilobytes of code or data therefore had to waste time switching between segments. Furthermore, programming with segments is more difficult than programming in a flat address space. Segmented address space is the cause of the memory models in the C programming language
that many programmers feel are inelegant.
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