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.Returns the amount of conventional memory available for use by MS-DOS and application programs.
Call with:
Nothing
Returns:
AX = memory size (in KB)
Notes:
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 MB boundary) that may be installed on 80286 or 80386 machines such as the PC/AT or PS/2 (Models 50 and above).