Usage: VERW src Modifies flags: ZF Verifies the specified segment selector is valid and is ratable at the current privilege level. If the segment is writable, the Zero Flag is set, otherwise it is cleared. Clocks Size Operands 808x 286 386 486 Bytes reg16 - 14 15 11 3 mem16 - 16 16 11 5 - see Instruction Timing