INT 16 - PC Tools v5.1+ DESKTOP API - GET/SET???
AX = FFB8h
BH = subfunction
00h get
Return: BL = old value of ???
CL = old value of ??? (v6.0+)
CH = old value of ??? (v6.0+)
nonzero set
BL = new value for ???
CL = new value for ??? (v6.0+)
CH = new value for ??? (v6.0+)
DH = ???
Return: AL = old value replaced by CL (v6.0+)
AH = old value replaced by CH (v6.0+)


16FFB8 - PC Tools v5.1+ DESKTOP API - GET/SET???