INT 21 P - OS/286, OS/386 - CHANGE SEGMENTS
AH = E9h
AL = function
01h change code segment parameters
02h change data segment parameters
05h adjust segment limit
06h change segment base address
???
Return: ???
SeeAlso: AH=E8h"OS/286",AH=EAh"OS/286",AH=EDh"OS/286"

See also: 21E7

21E9 - OS/286, OS/386 - CHANGE SEGMENTS