INT 14,0 - Initialize Communications Port Parameters

AH = 00

AL = parms for initialization (see tables below)

DX = zero based serial port number (0-1) (0-3 for AT)

¦7¦6¦5¦4¦3¦2¦1¦0¦ AL Parity (bits 4 & 3)

¦ ¦ ¦ ¦ ¦ ¦ +------ word length bits 00 = none

¦ ¦ ¦ ¦ ¦ +------- stop bits flag 01 = odd

¦ ¦ ¦ +---------- parity bits 10 = none

+--------------- baud rate bits 11 = even

% Word length (bits 1 & 0) Stop bit count (bit 2)

10 = 7 bits 0 = 1 stop bit

11 = 8 bits 1 = 2 stop bits

% Baud rate (bits 7, 6 & 5)

000 = 110 baud 100 = 1200 baud

001 = 150 baud 101 = 2400 baud

010 = 300 baud 110 = 4800 baud

011 = 600 baud 111 = 9600 baud (4800 on PCjr)

on return:

AH = port status

AL = modem status

- for status bits see ~INT 14,STATUS~