DOS / Functions / 58/02

                   INT 21 - DOS 5.x - GET UMB LINK STATUS

Input	DOS1	N	DOS2	N	DOS3	N	DOS5	Y	Output
AX	58h		02h		Result / Error Code				AX
BX									BX
CX									CX
DX									DX
ES:DI					Set if Error				CF

Result: 00h = Not Linked
        01h = Linked

See Also 48h 49h 4Ah Memory Control Block Error Codes