INT 61 - Atari Portfolio - GET SERIAL PORTIBM PC Portable (uses same BIOS as XT) PARAMETERS AH = 19h DX = serial port number Return: AH = status 00h successful AL = composite parameters (see #00300 at INT 14/AH=00h"SERIAL") other error SeeAlso: AH=00h"Portfolio",AH=15h"Portfolio",AH=1Ah"Portfolio"