Function 04h Auxiliary Output

mov dl, OutputChar ;character to output

mov ah, 04h ;Auxiliary Output

int 21h

Auxiliary Output (Function 04h) sends a character to the auxiliary output device.

This function has been superseded by Write File or Device (Function 40h).

Parameter

OutputChar

Specifies the ASCII value of the character to be displayed.

Return Value

This function has no return value.

Comment

If the output device is busy, this function waits until the device is ready.

See Also

Function 03h Auxiliary Input
Function 40h Write File or Device