DOS / Functions / 0B

                  INT 21 - DOS - CHECK STANDARD INPUT STATUS

Input	DOS1	Y	DOS2	Y	DOS3	Y	DOS5	Y	Output
AX	0Bh						00h=No, FFh=Yes		AX
BX									BX
CX									CX
DX									DX
ES:DI									CF

Note:   ^C/^Break checked, and INT 23h called if pressed

See Also 06h 01h 07h 08h