INT 14 - Digiboard DigiCHANNEL PC/X* - CHANGE BAUD RATE
AH = 04h
AL = initializing parameters
bits 7-5 unused
bits 4,3: parity (00 none, 01 odd, 11 even)
bit 2: stop bits (0 = one, 1 = two)
bits 1,0: data bits (00 = five, 01 = six, 10 = seven, 11 = eight)
BX = baud rate
DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)
Return: AH = status
00h successful
FFh error

See also: 1405

1404 - Digiboard DigiCHANNEL PC/X* - CHANGE BAUD RATE