## ALP Programming Guide and Reference

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### Protected Mode Exceptions

#GP(0) if the current privilege level is greater than the I/O privilege level and any of the corresponding I/O permission bits in TSS equals 1; #GP (0) for an illegal memory operand effective address in the CS, DS, ES, FS, or GS segments; #SS(0) for an illegal address in the SS segment; #PF(fault- code) for a page fault; #AC for unaligned memory reference if the current privilege level is 3.