Interrupt 2Fh Function 4800h Get DOSKEY.COM Installed State

mov ax, 4800h ;Get DOSKEY.COM Installed State

int 2Fh ;Multiplex Interrupt

cmp al, 00h ;00h means not installed

Get DOSKEY.COM Installed State (Interrupt 2Fh Function 4800h) determines whether the resident portion of the Doskey program has been loaded.

Parameters

This function has no parameters.

Return Value

The AL register contains a nonzero value if the Doskey program has been loaded or 00h if it has not.

See Also

Interrupt 2Fh Function 4810h Read Command Line