DS:SI address of a filled-in XmsMoveInfoRec (see below)
Returns: AX status: 0000H = successful
Info: This fn copies a block of data from one location to another. Use
it to transfer data into and out of extended memory. It can also
copy data from place to place in conventional memory or between
DS:SI points to a structure that describes the data to be moved. It is
+0 4 lRgnLength DWORD size, in bytes to move
+4 2 wSrcHandle src XMB handle or 0=conventional mem
+6 4 lSrcOffset DWORD offset in src XMB block
or segment:offset in conventional mem
+0aH 2 wDestHandle dest XMB handle or 0=conventional mem
+0cH 4 lDestOffset DWORD offset in dest XMB block
or segment:offset in conventional mem
16 size of an XmsMoveInfoRec
When wSrcHandle or wDestHandle is 0000H, the source or
destination is in conventional memory. In that case, the
lSrcOffset (or lDestOffset) must be a 32-bit segment:offset in
Notes: If source and destination overlap, the source must be less than
The lRgnLength must be even.
The move is faster when both source and destination begin on
WORD boundaries and faster still when aligned on DWORD
boundaries (on 386+ CPUs).