INT 14 - IBM/Yale EBIOS SERIAL I/O - SET RECEIVE BUFFER AX = FF02h CX = length of buffer (0000h to cancel buffer assignment) DX = port (00h-03h) ES:BX -> receive buffer Return: nothing SeeAlso: AH=18h,AH=83h"COURIERS",AH=A5h"BAPI",AH=FCh,AX=FF01h