MCOPY - Memory copying instruction

EIP 5656, MCOPY - Memory copying instruction. Provide an efficient EVM instruction for copying memory areas.

Official external source only
Design paper
Official source

Record

Authors: Alex Beregszaszi , Paul Dworzanski , Jared Wasinger , Casey Detrio , Pawel Bylica , Charles Cooper
Date: 2021
Publisher: Alex Beregszaszi , Paul Dworzanski , Jared Wasinger , Casey Detrio , Pawel Bylica , Charles Cooper
Version: Source cited by the 2021 study. The study is the reading. This page does not add a second essay.
Document ID: BLC-STUDY-0347
DOI: None recorded
Last reviewed: 1 October 2026
Licence: No licence recorded. Rights status under review.

No hash is published. This build does not store those PDF bytes, so a checksum would be invented. Where a legacy path exists, it points at the Internet Archive copy of the old library.

Direct answer

EIP 5656, MCOPY - Memory copying instruction. Provide an efficient EVM instruction for copying memory areas.

Where to read

Official source — EIP 5656
Blockchain Lab study, the canonical readingOriginal commentary. Not a transcription of the paper.

Metadata and commentary only. The reading is the study page.

Full text

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What changed

Status in the source: Final. A reading of the public specification, not a copy of it and not a certification.

Relationships

Canonical readingEIP 5656 study
Related paperEIP-4844
Related paperPlasma
Related paperArbitrum

Cite this record

These citations point at the source document. They are not a licence to copy it.

Author–date

Beregszaszi, A., Dworzanski, P., Wasinger, J., Detrio, C., Bylica, P., & Cooper, C. (2021). MCOPY - Memory copying instruction. Alex Beregszaszi , Paul Dworzanski , Jared Wasinger , Casey Detrio , Pawel Bylica , Charles Cooper. https://eips.ethereum.org/EIPS/eip-5656

BibTeX

@techreport{eip56562021,
  title = {MCOPY - Memory copying instruction},
  author = {Alex Beregszaszi , Paul Dworzanski , Jared Wasinger , Casey Detrio , Pawel Bylica , Charles Cooper},
  year = {2021},
  institution = {Alex Beregszaszi , Paul Dworzanski , Jared Wasinger , Casey Detrio , Pawel Bylica , Charles Cooper},
  url = {https://eips.ethereum.org/EIPS/eip-5656},
  note = {Rights status: Official external source only. Blockchain Lab record: https://blockchainlab.com/research/corpus/papers/eip-5656}
}

RIS

TY  - RPRT
TI  - MCOPY - Memory copying instruction
AU  - Alex Beregszaszi
AU  - Paul Dworzanski
AU  - Jared Wasinger
AU  - Casey Detrio
AU  - Pawel Bylica
AU  - Charles Cooper
PY  - 2021
PB  - Alex Beregszaszi , Paul Dworzanski , Jared Wasinger , Casey Detrio , Pawel Bylica , Charles Cooper
UR  - https://eips.ethereum.org/EIPS/eip-5656
N1  - Rights status: Official external source only
ER  -

CSL-JSON

[
  {
    "type": "report",
    "id": "BLC-STUDY-0347",
    "title": "MCOPY - Memory copying instruction",
    "author": [
      {
        "literal": "Alex Beregszaszi"
      },
      {
        "literal": "Paul Dworzanski"
      },
      {
        "literal": "Jared Wasinger"
      },
      {
        "literal": "Casey Detrio"
      },
      {
        "literal": "Pawel Bylica"
      },
      {
        "literal": "Charles Cooper"
      }
    ],
    "issued": {
      "date-parts": [
        [
          2021
        ]
      ]
    },
    "publisher": "Alex Beregszaszi , Paul Dworzanski , Jared Wasinger , Casey Detrio , Pawel Bylica , Charles Cooper",
    "URL": "https://eips.ethereum.org/EIPS/eip-5656",
    "note": "Rights status: Official external source only. Not a licence to republish the paper."
  }
]

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Rights record

Source status: Official source
Use status: Metadata and commentary only. The reading is the study page.
Rights: Official external source only
Training and retrieval: Not permitted from this site. There is no rights-cleared full text to retrieve or to train on.

Rights and licensing Corrections