Int 21 Fn FFB1  - Topware Network OS V5.10+ - Set Spooler Printing Priori  [N]

   AX = FFB1h
   CH = printer number (00h LPT1, 01h LPT2, 02h LPT3)
   CH = new priority (00h normal, 01h high)

Return: nothing

See Also: AX=FFB0h