Int 2A Fn 06  - Netbios, Lantastic - Network Print-stream Control          [N]

   AH = 06h
   AL = function
       01h set concatenation mode
       all printer output put in one job until return to DOS prompt
       02h set truncation mode (default)
       printer open/close or BIOS/DOS output switch starts new job
       03h flush printer output and start new print job

Return: CF set on error
       AX = error code
   CF clear if successful

Notes: subfunction 03h is equivalent to Ctrl/Alt/keypad-*
   supported by PC LAN Program, LANtastic, NetWare, 10NET, etc.
   LANtastic v4.x no longer supports this call
   this function sets the printer mode for all redirected printers

See Also: INT 21/AX=5D08h,INT 21/AX=5D09h,INT 2F/AX=1125h