Microsoft KB Archive/139839

= OpCode Values for x86 Based Computers =

Article ID: 139839

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Workstation 3.1
 * Microsoft Windows NT Advanced Server 3.1
 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51

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This article was previously published under Q139839



X86 Based machines may display STOP errors because of Opcode exceptions from the CPU. An error of this type usually causes STOP 0x7F. In the case of a STOP 0x7F, the first parameter contains the OpCode that caused the fault. The following is a list of the current Opcode exceptions which are reported by x86 CPUs.

0x00000000              Divide by Zero Error 0x00000001              Debugger Interrupt 0x00000002              Nonmaskable Interrupt 0x00000003              Breakpoint 0x00000004              Interrupt on overflow (INTO) 0x00000005              Array boundary violation (BOUND) 0x00000006              Invalid Opcode 0x00000007              Coprocessor Not Available 0x00000008              Double Fault 0x00000009              Coprocessor Segment Overrun (reserved on 486) 0x0000000A              Invalid TSS 0x0000000B              Segment Not Present 0x0000000C              StackException 0x0000000D              General Protection 0x0000000E              Page Fault 0x0000000F              (RESERVED) 0x00000010               Coprocessor Error 0x00000011              Alignment check (486 only) 0x00000012-0x0000001F   (RESERVED) 0x00000020-0x000000FF   Available for External Interrupts via INTR Pin

Additional query words: prodnt

Keywords: KB139839

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