If the BIOS interrupts are int 0, at the beginning of the XXX;
CodePudding user response:
No, less than 20 h is the BIOS interrupt level, the following were basically DOS support; In fact, even the BIOS interrupt, DOS as if it is also possible to change or expand, and during the period of POST does not necessarily exactly the same,CodePudding user response:
Began 80 h is reserved for the ROM BIOS (original) of the definition of IBM, and less than 20 h according to the definition of Intel is reserved for the processor exception, should not be used to soft interrupt, but Intel is a small company, IBM is a giant, no bird Intel specification, the 5 h used to print directly to the screen, 10 h is used to display the service, after 20 h ~ 7 fh also has a part is used by the BIOS service, 40 h, h, 41