DOS / Interrupts / Int 2F / 12/26


                      DOS INTERNAL SERVICES - Open File

Input	DOS1	N	DOS2	N	DOS3	Y	DOS5	Y	Output
AX	12h		26h		Handle / Error Code				AX
BX									BX
CX			Access Code						CX
									DX
DS:DX	ASCIIZ File Specification				Set if Error				CF