INT 14 - X00 FOSSIL - EXTENDED SERIAL PORT STATUS/CONTROL AH = 1Fh DX = port number AL = direction 00h read modem control register Return: BL = modem control register (see #00349) AH = status 01h write modem control register BL = modem control register (see #00349) Return: AX = status Notes: this function is intended to exactly emulate the PS/2 BIOS AH=05h call X00 forces BL bit 3 set (interrupts cannot be disabled) SeeAlso: AH=00h,AH=05h"SERIAL"