Int 10 Fn CB04  - Unchain - Update Page 4 Offset                           [V]

   AX = CB04h
   BX = offset of page 4

Return: nothing
Desc:  inform UNCHAIN of the location of video page 4 in video memory; the
     default is BB80h (48000, for 320x200)

See Also: AX=CB01h,AX=CB02h,AX=CB03h,AX=CB05h