Int 10 Fn CB02 - Unchain - Update Page 2 Offset [V]
AX = CB02h
BX = offset of page 2
Return: nothing
Desc: inform UNCHAIN of the location of video page 2 in video memory; the
default is 3E80h (16000, for 320x200)
See Also: AX=CB00h,AX=CB01h,AX=CB03h,AX=CB04h