Int 14 Fn 0D - Digiboard Digichannel PC/x* - Get Pointer To Ch_key_rdy F [S] AH = 0Dh DX = port number (00h-03h) (04h-43h for XAPCM232.SYS) Return: ES:BX -> CH_KEY_RDY flag See Also: AH=0Ah"Digiboard" Values for CH_KEY_RDY flag: 00h receive buffer empty FFh characters available