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Asked: 2026-05-15T16:01:29+00:00

In the Intel documentation manuals, I see references to 00+ multiple places, but no

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In the Intel documentation manuals, I see references to 00+ multiple places, but no definition. What is this 00+ instruction/opcode?

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  1. Editorial Team

    Referred to an instruction/opcode, it means it’s supported by 8086 or later processors.

    Instruction’s introductory processor code:

    * 00: 8086
* 01: 80186
* 02: 80286
* 03: 80386
* 04: 80486
* P1 (05): Pentium (1)
* PX (06): Pentium with MMX
* PP (07): Pentium Pro
* P2 (08): Pentium II
* P3 (09): Pentium III
* P4 (10): Pentium 4
* C1 (11): Core (1)
* C2 (12): Core 2
* C7 (13): Core i7
* IT (99): Itanium (only geek editions)
    1. If the processor marking is a range (e.g., 03-04), it means that the
      instruction is unsupported in later
      processors.
    2. XX+ means the instruction is supported in any later processors and also in 64-bit mode, if the next row doesn’t
      explicitly say otherwise.
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