DOS / Interrupts / Int 2F / 12/10


          DOS INTERNAL SERVICES - Find Modified Buffer / Time Delay

Input	DOS1	N	DOS2	N	DOS3	Y	DOS5	Y	Output
AX	12h		10h						AX
BX									BX
CX									CX
DX					Pointer to First Dirty Buffer				DS:SI
ES:DI					Clear if Found				ZF

        DOS V3.xx - Finds a dirty buffer
        DOS V4.xx - Does nothing (time delay)