DOS / Interrupts / Int 2F / 12/16


                   DOS INTERNAL SERVICES - Get DCB Address

Input	DOS1	N	DOS2	N	DOS3	Y	DOS5	Y	Output
AX	12h		16h		Error Code				AX
BX	File Handle								BX
CX									CX
DX					Set if Error				CF
ES:DI					Pointer to DCB				ES:DI