RBIL61 - Browse Interrupt 0x4C
INT 4C - Acorn BBC Master 512 - "OSCLI" - INTERPRET COMMAND LINE INT 4C - Tandy 2000 - GET MEMORY SIZE INT 4C - TI Professional PCIBM PC - CLOCK/ANALOG INTERFACE INT 4C - Z100 - Slave 8259 - S100 vectored line 4