mov ax, 0100h ;Get PRINT.EXE Installed State
int 2Fh ;Multiplex Interrupt
Get PRINT.EXE Installed State (Interrupt 2Fh Function 0100h) determines whether the resident portion of the print command has been loaded.
This function has no parameters.
The AL register contains 0FFh if print has been loaded or 00h if it has not.