INT 10 - VIDEO - AX PC - GET/SET SCROLL MODE
AX = 8200h
BL = new scroll mode or FFh to get current mode
00h dynamic, 01h software
Return: AL = scroll mode (current mode if BL=FFh, previous mode otherwise)
SeeAlso: AH=07h

See also: 1006

108200 - VIDEO - AX PC - GET/SET SCROLL MODE