INT 71 C - IRQ9 - REDIRECTED TO INT 0A BY BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. Notes: may be masked by setting bit 1 on I/O port A1h the default BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. handler invokes INT 0A for compatibility, since the pin for IRQ2 on the PCIBM PC expansion bus became the pin for IRQ9 on the ATIBM PC AT expansion bus. under DESQview, only the INT 15h vector and BASIC(Beginner's All-purpose Symbolic Instruction Code) A programming language originally designed as a means of teaching FORTRAN. There are many variations of BASIC with differing capabilities; the majority are interpreted but compiled BASIC is becoming more popular. All genuine IBMInternational Busiuness Machines personal computers (including the latest PS/2IBM PS/2, any model models) come equipped with a cassette-based BASIC interpreter in ROM. segment address (the word at 0000h:0510h) may be assumed to be valid for the handler's process SeeAlso: INT 0A"IRQ2",INT 59"IRQ9",MEM 0040h:006Bh