INT 0A CP - CPU-generated (80286+) - INVALID TASK STATE SEGMENT Desc: automatically called during a task switch if the new TSS specified by the task gate is invalid for any of the following reasons: TSS limit is less than 43 (80286) or 103 (80386/80486) LDT selector invalid or segment not present null SS selector, or SS selector outside LDT/GDT limit stack segment is read-only stack segment DPLsee DOS Parameter List differs from new CPL, or RPL <> CPL CS selector is outside LDT/GDT limit or not code non-conforming code segment's DPLsee DOS Parameter List differs from CPL conforming code segment's DPLsee DOS Parameter List > CPL DS/ES selectors outside LDT/GDT limit or not readable segments Note: the handler must use a task gate in order to have a valid TSS under which to execute; it must also reset the busy bit in the new TSS SeeAlso: INT 0B"CPU(Central Processing Unit) The microprocessor which executes programs on your computer."