43 INT 43 - VIDEO DATA - CHARACTER TABLE (EGA,MCGA,VGA)
43 INT 43 - Z100 - Master 8259 - Slave 8259 input
43 INT 43 - TI Professional PC - IRQ3 - TIMER1 25ms INTERVAL INTERRUPT
43 INT 43 - Acorn BBC Master 512 - "OSBGET" - READ SINGLE BYTE FROM FILE