Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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     On some early PC models, the amount of memory returned by this
     function is controlled by the settings of the dip switches on the
     system board and may not reflect all the memory that is physically
     present.
 
     On the PC/AT, the value returned is the amount of functional
     memory found during the power-on self-test, regardless of the
     memory size configuration information stored in CMOS RAM.
 
     The value returned does not reflect any extended memory (above the
     1=megabyte boundary) that may be installed on 80286 or 80386
     machines such as the PC/AT or PS/2 (Models 50 and above).
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