INT FA - Sanyo MBC-550/555 - IRQ2 - SERIAL PORTIBM PC Portable (uses same BIOS as XT) USART(Universal Synchronous/Asynchronous Receiver/Transmitter) see also UART INTERRUPT Note: this vector is not used on the Tandy 1000TL SeeAlso: INT 0A"IRQ2",INT F9"Sanyo",INT FB"Sanyo"