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Function 4Fh Get/Set Partial Page Map
These four subfunctions are provided for context switching
required by interrupt routines, operating environments and
systems. This set of functions provides extended functionality
over the EEMS function 6Ah (function 43) involving subsets of
pages. In EEMS, a subset of pages could be specified by starting
position and number of pages; in this function a list of pages is
specified, which need not be contiguous. Interrupt routines can
use this function in place of functions 47h and 48h, especially
if the interrupt routine wants to use more than the standard four
physical pages. |