Format of IFSHLP ??? data:
Offset Size Description )
00h DWORD -> DOS Swappable Data Area (see #01687,#01689)
02h WORD ??? offset in DOS data segment?
04h WORD offset in DOS data segment of current-PSP WORD
06h WORD ???
08h WORD ???
0Ah WORD ???
0Ch DWORD -> DOS List of Lists (see #01627)
10h ???
SeeAlso: #01416