BIOS interrupt calls are a feature of a BIOS used by DOS programs and other software to invoke the BIOS's capabilities. An example of BIOS interrupt is when you press the Print Screen button on your keyboard the 05h BIOS interrupt gets called. If the BIOS were unable to detect any bootable volumes at start up this would be an 18h to execute BASIC interrupt call. For more on these with
. elaborate charts of BIOS interrupt calls, see the article at Wikipedia at http://en.wikipedia.org/wiki/BIOS_interrupt_call. For the short interrupts list for 8086 and DOS interrupts for x86, and AMD compatible microprocessors in PCs see the site at http://www.emu8086.com/assembly_language_tutorial_assembler_reference/8086_bios_and_dos_interrupts.html for the complete list of assembler emulators.
